'use strict';
Object.defineProperty(exports, '__esModule', { value: true });
function _objectWithoutPropertiesLoose(source, excluded) {
if (source == null) return {};
var target = {};
var sourceKeys = Object.keys(source);
var key, i;
for (i = 0; i < sourceKeys.length; i++) {
key = sourceKeys[i];
if (excluded.indexOf(key) >= 0) continue;
target[key] = source[key];
}
return target;
}
class Position {
constructor(line, col, index) {
this.line = void 0;
this.column = void 0;
this.index = void 0;
this.line = line;
this.column = col;
this.index = index;
}
}
class SourceLocation {
constructor(start, end) {
this.start = void 0;
this.end = void 0;
this.filename = void 0;
this.identifierName = void 0;
this.start = start;
this.end = end;
}
}
function createPositionWithColumnOffset(position, columnOffset) {
const { line, column, index } = position;
return new Position(line, column + columnOffset, index + columnOffset);
}
const ParseErrorCodes = Object.freeze({
SyntaxError: 'BABEL_PARSER_SYNTAX_ERROR',
SourceTypeModuleError: 'BABEL_PARSER_SOURCETYPE_MODULE_REQUIRED',
});
const reflect = (keys, last = keys.length - 1) => ({
get() {
return keys.reduce((object, key) => object[key], this);
},
set(value) {
keys.reduce(
(item, key, i) => (i === last ? (item[key] = value) : item[key]),
this
);
},
});
const instantiate = (constructor, properties, descriptors) =>
Object.keys(descriptors)
.map((key) => [key, descriptors[key]])
.filter(([, descriptor]) => !!descriptor)
.map(([key, descriptor]) => [
key,
typeof descriptor === 'function' ?
{
value: descriptor,
enumerable: false,
}
: typeof descriptor.reflect === 'string' ?
Object.assign({}, descriptor, reflect(descriptor.reflect.split('.')))
: descriptor,
])
.reduce(
(instance, [key, descriptor]) =>
Object.defineProperty(
instance,
key,
Object.assign(
{
configurable: true,
},
descriptor
)
),
Object.assign(new constructor(), properties)
);
var ModuleErrors = (_) => ({
ImportMetaOutsideModule: _(
`import.meta may appear only with 'sourceType: "module"'`,
{
code: ParseErrorCodes.SourceTypeModuleError,
}
),
ImportOutsideModule: _(
`'import' and 'export' may appear only with 'sourceType: "module"'`,
{
code: ParseErrorCodes.SourceTypeModuleError,
}
),
});
const NodeDescriptions = {
ArrayPattern: 'array destructuring pattern',
AssignmentExpression: 'assignment expression',
AssignmentPattern: 'assignment expression',
ArrowFunctionExpression: 'arrow function expression',
ConditionalExpression: 'conditional expression',
ForOfStatement: 'for-of statement',
ForInStatement: 'for-in statement',
ForStatement: 'for-loop',
FormalParameters: 'function parameter list',
Identifier: 'identifier',
ObjectPattern: 'object destructuring pattern',
ParenthesizedExpression: 'parenthesized expression',
RestElement: 'rest element',
UpdateExpression: {
true: 'prefix operation',
false: 'postfix operation',
},
VariableDeclarator: 'variable declaration',
YieldExpression: 'yield expression',
};
const toNodeDescription = ({ type, prefix }) =>
type === 'UpdateExpression' ?
NodeDescriptions.UpdateExpression[String(prefix)]
: NodeDescriptions[type];
var StandardErrors = (_) => ({
AccessorIsGenerator: _(({ kind }) => `A ${kind}ter cannot be a generator.`),
ArgumentsInClass: _(
"'arguments' is only allowed in functions and class methods."
),
AsyncFunctionInSingleStatementContext: _(
'Async functions can only be declared at the top level or inside a block.'
),
AwaitBindingIdentifier: _(
"Can not use 'await' as identifier inside an async function."
),
AwaitBindingIdentifierInStaticBlock: _(
"Can not use 'await' as identifier inside a static block."
),
AwaitExpressionFormalParameter: _(
"'await' is not allowed in async function parameters."
),
AwaitNotInAsyncContext: _(
"'await' is only allowed within async functions and at the top levels of modules."
),
AwaitNotInAsyncFunction: _("'await' is only allowed within async functions."),
BadGetterArity: _("A 'get' accesor must not have any formal parameters."),
BadSetterArity: _("A 'set' accesor must have exactly one formal parameter."),
BadSetterRestParameter: _(
"A 'set' accesor function argument must not be a rest parameter."
),
ConstructorClassField: _("Classes may not have a field named 'constructor'."),
ConstructorClassPrivateField: _(
"Classes may not have a private field named '#constructor'."
),
ConstructorIsAccessor: _('Class constructor may not be an accessor.'),
ConstructorIsAsync: _("Constructor can't be an async function."),
ConstructorIsGenerator: _("Constructor can't be a generator."),
DeclarationMissingInitializer: _(
({ kind }) => `Missing initializer in ${kind} declaration.`
),
DecoratorBeforeExport: _(
"Decorators must be placed *before* the 'export' keyword. You can set the 'decoratorsBeforeExport' option to false to use the 'export @decorator class {}' syntax."
),
DecoratorConstructor: _(
"Decorators can't be used with a constructor. Did you mean '@dec class { ... }'?"
),
DecoratorExportClass: _(
'Using the export keyword between a decorator and a class is not allowed. Please use `export @dec class` instead.'
),
DecoratorSemicolon: _('Decorators must not be followed by a semicolon.'),
DecoratorStaticBlock: _("Decorators can't be used with a static block."),
DeletePrivateField: _('Deleting a private field is not allowed.'),
DestructureNamedImport: _(
'ES2015 named imports do not destructure. Use another statement for destructuring after the import.'
),
DuplicateConstructor: _('Duplicate constructor in the same class.'),
DuplicateDefaultExport: _('Only one default export allowed per module.'),
DuplicateExport: _(
({ exportName }) =>
`\`${exportName}\` has already been exported. Exported identifiers must be unique.`
),
DuplicateProto: _('Redefinition of __proto__ property.'),
DuplicateRegExpFlags: _('Duplicate regular expression flag.'),
ElementAfterRest: _('Rest element must be last element.'),
EscapedCharNotAnIdentifier: _('Invalid Unicode escape.'),
ExportBindingIsString: _(
({ localName, exportName }) =>
`A string literal cannot be used as an exported binding without \`from\`.\n- Did you mean \`export { '${localName}' as '${exportName}' } from 'some-module'\`?`
),
ExportDefaultFromAsIdentifier: _(
"'from' is not allowed as an identifier after 'export default'."
),
ForInOfLoopInitializer: _(
({ type }) =>
`'${type === 'ForInStatement' ? 'for-in' : 'for-of'}' loop variable declaration may not have an initializer.`
),
ForOfAsync: _("The left-hand side of a for-of loop may not be 'async'."),
ForOfLet: _("The left-hand side of a for-of loop may not start with 'let'."),
GeneratorInSingleStatementContext: _(
'Generators can only be declared at the top level or inside a block.'
),
IllegalBreakContinue: _(
({ type }) =>
`Unsyntactic ${type === 'BreakStatement' ? 'break' : 'continue'}.`
),
IllegalLanguageModeDirective: _(
"Illegal 'use strict' directive in function with non-simple parameter list."
),
IllegalReturn: _("'return' outside of function."),
ImportBindingIsString: _(
({ importName }) =>
`A string literal cannot be used as an imported binding.\n- Did you mean \`import { "${importName}" as foo }\`?`
),
ImportCallArgumentTrailingComma: _(
'Trailing comma is disallowed inside import(...) arguments.'
),
ImportCallArity: _(
({ maxArgumentCount }) =>
`\`import()\` requires exactly ${maxArgumentCount === 1 ? 'one argument' : 'one or two arguments'}.`
),
ImportCallNotNewExpression: _('Cannot use new with import(...).'),
ImportCallSpreadArgument: _('`...` is not allowed in `import()`.'),
IncompatibleRegExpUVFlags: _(
"The 'u' and 'v' regular expression flags cannot be enabled at the same time."
),
InvalidBigIntLiteral: _('Invalid BigIntLiteral.'),
InvalidCodePoint: _('Code point out of bounds.'),
InvalidCoverInitializedName: _('Invalid shorthand property initializer.'),
InvalidDecimal: _('Invalid decimal.'),
InvalidDigit: _(({ radix }) => `Expected number in radix ${radix}.`),
InvalidEscapeSequence: _('Bad character escape sequence.'),
InvalidEscapeSequenceTemplate: _('Invalid escape sequence in template.'),
InvalidEscapedReservedWord: _(
({ reservedWord }) => `Escape sequence in keyword ${reservedWord}.`
),
InvalidIdentifier: _(
({ identifierName }) => `Invalid identifier ${identifierName}.`
),
InvalidLhs: _(
({ ancestor }) =>
`Invalid left-hand side in ${toNodeDescription(ancestor)}.`
),
InvalidLhsBinding: _(
({ ancestor }) =>
`Binding invalid left-hand side in ${toNodeDescription(ancestor)}.`
),
InvalidNumber: _('Invalid number.'),
InvalidOrMissingExponent: _(
"Floating-point numbers require a valid exponent after the 'e'."
),
InvalidOrUnexpectedToken: _(
({ unexpected }) => `Unexpected character '${unexpected}'.`
),
InvalidParenthesizedAssignment: _(
'Invalid parenthesized assignment pattern.'
),
InvalidPrivateFieldResolution: _(
({ identifierName }) => `Private name #${identifierName} is not defined.`
),
InvalidPropertyBindingPattern: _('Binding member expression.'),
InvalidRecordProperty: _(
'Only properties and spread elements are allowed in record definitions.'
),
InvalidRestAssignmentPattern: _("Invalid rest operator's argument."),
LabelRedeclaration: _(
({ labelName }) => `Label '${labelName}' is already declared.`
),
LetInLexicalBinding: _(
"'let' is not allowed to be used as a name in 'let' or 'const' declarations."
),
LineTerminatorBeforeArrow: _("No line break is allowed before '=>'."),
MalformedRegExpFlags: _('Invalid regular expression flag.'),
MissingClassName: _('A class name is required.'),
MissingEqInAssignment: _(
"Only '=' operator can be used for specifying default value."
),
MissingSemicolon: _('Missing semicolon.'),
MissingPlugin: _(
({ missingPlugin }) =>
`This experimental syntax requires enabling the parser plugin: ${missingPlugin.map((name) => JSON.stringify(name)).join(', ')}.`
),
MissingOneOfPlugins: _(
({ missingPlugin }) =>
`This experimental syntax requires enabling one of the following parser plugin(s): ${missingPlugin.map((name) => JSON.stringify(name)).join(', ')}.`
),
MissingUnicodeEscape: _('Expecting Unicode escape sequence \\uXXXX.'),
MixingCoalesceWithLogical: _(
'Nullish coalescing operator(??) requires parens when mixing with logical operators.'
),
ModuleAttributeDifferentFromType: _(
'The only accepted module attribute is `type`.'
),
ModuleAttributeInvalidValue: _(
'Only string literals are allowed as module attribute values.'
),
ModuleAttributesWithDuplicateKeys: _(
({ key }) => `Duplicate key "${key}" is not allowed in module attributes.`
),
ModuleExportNameHasLoneSurrogate: _(
({ surrogateCharCode }) =>
`An export name cannot include a lone surrogate, found '\\u${surrogateCharCode.toString(16)}'.`
),
ModuleExportUndefined: _(
({ localName }) => `Export '${localName}' is not defined.`
),
MultipleDefaultsInSwitch: _('Multiple default clauses.'),
NewlineAfterThrow: _('Illegal newline after throw.'),
NoCatchOrFinally: _('Missing catch or finally clause.'),
NumberIdentifier: _('Identifier directly after number.'),
NumericSeparatorInEscapeSequence: _(
'Numeric separators are not allowed inside unicode escape sequences or hex escape sequences.'
),
ObsoleteAwaitStar: _(
"'await*' has been removed from the async functions proposal. Use Promise.all() instead."
),
OptionalChainingNoNew: _(
'Constructors in/after an Optional Chain are not allowed.'
),
OptionalChainingNoTemplate: _(
'Tagged Template Literals are not allowed in optionalChain.'
),
OverrideOnConstructor: _(
"'override' modifier cannot appear on a constructor declaration."
),
ParamDupe: _('Argument name clash.'),
PatternHasAccessor: _("Object pattern can't contain getter or setter."),
PatternHasMethod: _("Object pattern can't contain methods."),
PrivateInExpectedIn: _(
({ identifierName }) =>
`Private names are only allowed in property accesses (\`obj.#${identifierName}\`) or in \`in\` expressions (\`#${identifierName} in obj\`).`
),
PrivateNameRedeclaration: _(
({ identifierName }) => `Duplicate private name #${identifierName}.`
),
RecordExpressionBarIncorrectEndSyntaxType: _(
"Record expressions ending with '|}' are only allowed when the 'syntaxType' option of the 'recordAndTuple' plugin is set to 'bar'."
),
RecordExpressionBarIncorrectStartSyntaxType: _(
"Record expressions starting with '{|' are only allowed when the 'syntaxType' option of the 'recordAndTuple' plugin is set to 'bar'."
),
RecordExpressionHashIncorrectStartSyntaxType: _(
"Record expressions starting with '#{' are only allowed when the 'syntaxType' option of the 'recordAndTuple' plugin is set to 'hash'."
),
RecordNoProto: _("'__proto__' is not allowed in Record expressions."),
RestTrailingComma: _('Unexpected trailing comma after rest element.'),
SloppyFunction: _(
'In non-strict mode code, functions can only be declared at top level, inside a block, or as the body of an if statement.'
),
StaticPrototype: _('Classes may not have static property named prototype.'),
SuperNotAllowed: _(
"`super()` is only valid inside a class constructor of a subclass. Maybe a typo in the method name ('constructor') or not extending another class?"
),
SuperPrivateField: _("Private fields can't be accessed on super."),
TrailingDecorator: _('Decorators must be attached to a class element.'),
TupleExpressionBarIncorrectEndSyntaxType: _(
"Tuple expressions ending with '|]' are only allowed when the 'syntaxType' option of the 'recordAndTuple' plugin is set to 'bar'."
),
TupleExpressionBarIncorrectStartSyntaxType: _(
"Tuple expressions starting with '[|' are only allowed when the 'syntaxType' option of the 'recordAndTuple' plugin is set to 'bar'."
),
TupleExpressionHashIncorrectStartSyntaxType: _(
"Tuple expressions starting with '#[' are only allowed when the 'syntaxType' option of the 'recordAndTuple' plugin is set to 'hash'."
),
UnexpectedArgumentPlaceholder: _('Unexpected argument placeholder.'),
UnexpectedAwaitAfterPipelineBody: _(
'Unexpected "await" after pipeline body; await must have parentheses in minimal proposal.'
),
UnexpectedDigitAfterHash: _('Unexpected digit after hash token.'),
UnexpectedImportExport: _(
"'import' and 'export' may only appear at the top level."
),
UnexpectedKeyword: _(({ keyword }) => `Unexpected keyword '${keyword}'.`),
UnexpectedLeadingDecorator: _(
'Leading decorators must be attached to a class declaration.'
),
UnexpectedLexicalDeclaration: _(
'Lexical declaration cannot appear in a single-statement context.'
),
UnexpectedNewTarget: _(
'`new.target` can only be used in functions or class properties.'
),
UnexpectedNumericSeparator: _(
'A numeric separator is only allowed between two digits.'
),
UnexpectedPrivateField: _('Unexpected private name.'),
UnexpectedReservedWord: _(
({ reservedWord }) => `Unexpected reserved word '${reservedWord}'.`
),
UnexpectedSuper: _("'super' is only allowed in object methods and classes."),
UnexpectedToken: _(
({ expected, unexpected }) =>
`Unexpected token${unexpected ? ` '${unexpected}'.` : ''}${expected ? `, expected "${expected}"` : ''}`
),
UnexpectedTokenUnaryExponentiation: _(
'Illegal expression. Wrap left hand side or entire exponentiation in parentheses.'
),
UnsupportedBind: _('Binding should be performed on object property.'),
UnsupportedDecoratorExport: _(
'A decorated export must export a class declaration.'
),
UnsupportedDefaultExport: _(
'Only expressions, functions or classes are allowed as the `default` export.'
),
UnsupportedImport: _(
'`import` can only be used in `import()` or `import.meta`.'
),
UnsupportedMetaProperty: _(
({ target, onlyValidPropertyName }) =>
`The only valid meta property for ${target} is ${target}.${onlyValidPropertyName}.`
),
UnsupportedParameterDecorator: _(
'Decorators cannot be used to decorate parameters.'
),
UnsupportedPropertyDecorator: _(
'Decorators cannot be used to decorate object literal properties.'
),
UnsupportedSuper: _(
"'super' can only be used with function calls (i.e. super()) or in property accesses (i.e. super.prop or super[prop])."
),
UnterminatedComment: _('Unterminated comment.'),
UnterminatedRegExp: _('Unterminated regular expression.'),
UnterminatedString: _('Unterminated string constant.'),
UnterminatedTemplate: _('Unterminated template.'),
VarRedeclaration: _(
({ identifierName }) =>
`Identifier '${identifierName}' has already been declared.`
),
YieldBindingIdentifier: _(
"Can not use 'yield' as identifier inside a generator."
),
YieldInParameter: _('Yield expression is not allowed in formal parameters.'),
ZeroDigitNumericSeparator: _(
'Numeric separator can not be used after leading 0.'
),
});
var StrictModeErrors = (_) => ({
StrictDelete: _('Deleting local variable in strict mode.'),
StrictEvalArguments: _(
({ referenceName }) => `Assigning to '${referenceName}' in strict mode.`
),
StrictEvalArgumentsBinding: _(
({ bindingName }) => `Binding '${bindingName}' in strict mode.`
),
StrictFunction: _(
'In strict mode code, functions can only be declared at top level or inside a block.'
),
StrictNumericEscape: _(
"The only valid numeric escape in strict mode is '\\0'."
),
StrictOctalLiteral: _(
'Legacy octal literals are not allowed in strict mode.'
),
StrictWith: _("'with' in strict mode."),
});
const UnparenthesizedPipeBodyDescriptions = new Set([
'ArrowFunctionExpression',
'AssignmentExpression',
'ConditionalExpression',
'YieldExpression',
]);
var PipelineOperatorErrors = (_) => ({
PipeBodyIsTighter: _(
'Unexpected yield after pipeline body; any yield expression acting as Hack-style pipe body must be parenthesized due to its loose operator precedence.'
),
PipeTopicRequiresHackPipes: _(
'Topic reference is used, but the pipelineOperator plugin was not passed a "proposal": "hack" or "smart" option.'
),
PipeTopicUnbound: _(
'Topic reference is unbound; it must be inside a pipe body.'
),
PipeTopicUnconfiguredToken: _(
({ token }) =>
`Invalid topic token ${token}. In order to use ${token} as a topic reference, the pipelineOperator plugin must be configured with { "proposal": "hack", "topicToken": "${token}" }.`
),
PipeTopicUnused: _(
'Hack-style pipe body does not contain a topic reference; Hack-style pipes must use topic at least once.'
),
PipeUnparenthesizedBody: _(
({ type }) =>
`Hack-style pipe body cannot be an unparenthesized ${toNodeDescription({
type,
})}; please wrap it in parentheses.`
),
PipelineBodyNoArrow: _(
'Unexpected arrow "=>" after pipeline body; arrow function in pipeline body must be parenthesized.'
),
PipelineBodySequenceExpression: _(
'Pipeline body may not be a comma-separated sequence expression.'
),
PipelineHeadSequenceExpression: _(
'Pipeline head should not be a comma-separated sequence expression.'
),
PipelineTopicUnused: _(
'Pipeline is in topic style but does not use topic reference.'
),
PrimaryTopicNotAllowed: _(
'Topic reference was used in a lexical context without topic binding.'
),
PrimaryTopicRequiresSmartPipeline: _(
'Topic reference is used, but the pipelineOperator plugin was not passed a "proposal": "hack" or "smart" option.'
),
});
const _excluded$1 = ['toMessage'];
function toParseErrorConstructor(_ref) {
let { toMessage } = _ref,
properties = _objectWithoutPropertiesLoose(_ref, _excluded$1);
return function constructor({ loc, details }) {
return instantiate(
SyntaxError,
Object.assign({}, properties, {
loc,
}),
{
clone(overrides = {}) {
const loc = overrides.loc || {};
return constructor({
loc: new Position(
'line' in loc ? loc.line : this.loc.line,
'column' in loc ? loc.column : this.loc.column,
'index' in loc ? loc.index : this.loc.index
),
details: Object.assign({}, this.details, overrides.details),
});
},
details: {
value: details,
enumerable: false,
},
message: {
get() {
return `${toMessage(this.details)} (${this.loc.line}:${this.loc.column})`;
},
set(value) {
Object.defineProperty(this, 'message', {
value,
});
},
},
pos: {
reflect: 'loc.index',
enumerable: true,
},
missingPlugin: 'missingPlugin' in details && {
reflect: 'details.missingPlugin',
enumerable: true,
},
}
);
};
}
function toParseErrorCredentials(toMessageOrMessage, credentials) {
return Object.assign(
{
toMessage:
typeof toMessageOrMessage === 'string' ?
() => toMessageOrMessage
: toMessageOrMessage,
},
credentials
);
}
function ParseErrorEnum(argument, syntaxPlugin) {
if (Array.isArray(argument)) {
return (toParseErrorCredentialsMap) =>
ParseErrorEnum(toParseErrorCredentialsMap, argument[0]);
}
const partialCredentials = argument(toParseErrorCredentials);
const ParseErrorConstructors = {};
for (const reasonCode of Object.keys(partialCredentials)) {
ParseErrorConstructors[reasonCode] = toParseErrorConstructor(
Object.assign(
{
code: ParseErrorCodes.SyntaxError,
reasonCode,
},
syntaxPlugin ?
{
syntaxPlugin,
}
: {},
partialCredentials[reasonCode]
)
);
}
return ParseErrorConstructors;
}
const Errors = Object.assign(
{},
ParseErrorEnum(ModuleErrors),
ParseErrorEnum(StandardErrors),
ParseErrorEnum(StrictModeErrors),
ParseErrorEnum`pipelineOperator`(PipelineOperatorErrors)
);
const { defineProperty } = Object;
const toUnenumerable = (object, key) =>
defineProperty(object, key, {
enumerable: false,
value: object[key],
});
function toESTreeLocation(node) {
node.loc.start && toUnenumerable(node.loc.start, 'index');
node.loc.end && toUnenumerable(node.loc.end, 'index');
return node;
}
var estree = (superClass) =>
class extends superClass {
parse() {
const file = toESTreeLocation(super.parse());
if (this.options.tokens) {
file.tokens = file.tokens.map(toESTreeLocation);
}
return file;
}
parseRegExpLiteral({ pattern, flags }) {
let regex = null;
try {
regex = new RegExp(pattern, flags);
} catch (e) {}
const node = this.estreeParseLiteral(regex);
node.regex = {
pattern,
flags,
};
return node;
}
parseBigIntLiteral(value) {
let bigInt;
try {
bigInt = BigInt(value);
} catch (_unused) {
bigInt = null;
}
const node = this.estreeParseLiteral(bigInt);
node.bigint = String(node.value || value);
return node;
}
parseDecimalLiteral(value) {
const decimal = null;
const node = this.estreeParseLiteral(decimal);
node.decimal = String(node.value || value);
return node;
}
estreeParseLiteral(value) {
return this.parseLiteral(value, 'Literal');
}
parseStringLiteral(value) {
return this.estreeParseLiteral(value);
}
parseNumericLiteral(value) {
return this.estreeParseLiteral(value);
}
parseNullLiteral() {
return this.estreeParseLiteral(null);
}
parseBooleanLiteral(value) {
return this.estreeParseLiteral(value);
}
directiveToStmt(directive) {
const directiveLiteral = directive.value;
const stmt = this.startNodeAt(directive.start, directive.loc.start);
const expression = this.startNodeAt(
directiveLiteral.start,
directiveLiteral.loc.start
);
expression.value = directiveLiteral.extra.expressionValue;
expression.raw = directiveLiteral.extra.raw;
stmt.expression = this.finishNodeAt(
expression,
'Literal',
directiveLiteral.loc.end
);
stmt.directive = directiveLiteral.extra.raw.slice(1, -1);
return this.finishNodeAt(stmt, 'ExpressionStatement', directive.loc.end);
}
initFunction(node, isAsync) {
super.initFunction(node, isAsync);
node.expression = false;
}
checkDeclaration(node) {
if (node != null && this.isObjectProperty(node)) {
this.checkDeclaration(node.value);
} else {
super.checkDeclaration(node);
}
}
getObjectOrClassMethodParams(method) {
return method.value.params;
}
isValidDirective(stmt) {
var _stmt$expression$extr;
return (
stmt.type === 'ExpressionStatement' &&
stmt.expression.type === 'Literal' &&
typeof stmt.expression.value === 'string' &&
!(
(_stmt$expression$extr = stmt.expression.extra) != null &&
_stmt$expression$extr.parenthesized
)
);
}
parseBlockBody(node, ...args) {
super.parseBlockBody(node, ...args);
const directiveStatements = node.directives.map((d) =>
this.directiveToStmt(d)
);
node.body = directiveStatements.concat(node.body);
delete node.directives;
}
pushClassMethod(
classBody,
method,
isGenerator,
isAsync,
isConstructor,
allowsDirectSuper
) {
this.parseMethod(
method,
isGenerator,
isAsync,
isConstructor,
allowsDirectSuper,
'ClassMethod',
true
);
if (method.typeParameters) {
method.value.typeParameters = method.typeParameters;
delete method.typeParameters;
}
classBody.body.push(method);
}
parsePrivateName() {
const node = super.parsePrivateName();
{
if (!this.getPluginOption('estree', 'classFeatures')) {
return node;
}
}
return this.convertPrivateNameToPrivateIdentifier(node);
}
convertPrivateNameToPrivateIdentifier(node) {
const name = super.getPrivateNameSV(node);
node = node;
delete node.id;
node.name = name;
node.type = 'PrivateIdentifier';
return node;
}
isPrivateName(node) {
{
if (!this.getPluginOption('estree', 'classFeatures')) {
return super.isPrivateName(node);
}
}
return node.type === 'PrivateIdentifier';
}
getPrivateNameSV(node) {
{
if (!this.getPluginOption('estree', 'classFeatures')) {
return super.getPrivateNameSV(node);
}
}
return node.name;
}
parseLiteral(value, type) {
const node = super.parseLiteral(value, type);
node.raw = node.extra.raw;
delete node.extra;
return node;
}
parseFunctionBody(node, allowExpression, isMethod = false) {
super.parseFunctionBody(node, allowExpression, isMethod);
node.expression = node.body.type !== 'BlockStatement';
}
parseMethod(
node,
isGenerator,
isAsync,
isConstructor,
allowDirectSuper,
type,
inClassScope = false
) {
let funcNode = this.startNode();
funcNode.kind = node.kind;
funcNode = super.parseMethod(
funcNode,
isGenerator,
isAsync,
isConstructor,
allowDirectSuper,
type,
inClassScope
);
funcNode.type = 'FunctionExpression';
delete funcNode.kind;
node.value = funcNode;
if (type === 'ClassPrivateMethod') {
node.computed = false;
}
type = 'MethodDefinition';
return this.finishNode(node, type);
}
parseClassProperty(...args) {
const propertyNode = super.parseClassProperty(...args);
{
if (!this.getPluginOption('estree', 'classFeatures')) {
return propertyNode;
}
}
propertyNode.type = 'PropertyDefinition';
return propertyNode;
}
parseClassPrivateProperty(...args) {
const propertyNode = super.parseClassPrivateProperty(...args);
{
if (!this.getPluginOption('estree', 'classFeatures')) {
return propertyNode;
}
}
propertyNode.type = 'PropertyDefinition';
propertyNode.computed = false;
return propertyNode;
}
parseObjectMethod(prop, isGenerator, isAsync, isPattern, isAccessor) {
const node = super.parseObjectMethod(
prop,
isGenerator,
isAsync,
isPattern,
isAccessor
);
if (node) {
node.type = 'Property';
if (node.kind === 'method') node.kind = 'init';
node.shorthand = false;
}
return node;
}
parseObjectProperty(
prop,
startPos,
startLoc,
isPattern,
refExpressionErrors
) {
const node = super.parseObjectProperty(
prop,
startPos,
startLoc,
isPattern,
refExpressionErrors
);
if (node) {
node.kind = 'init';
node.type = 'Property';
}
return node;
}
isValidLVal(type, ...rest) {
return type === 'Property' ? 'value' : super.isValidLVal(type, ...rest);
}
isAssignable(node, isBinding) {
if (node != null && this.isObjectProperty(node)) {
return this.isAssignable(node.value, isBinding);
}
return super.isAssignable(node, isBinding);
}
toAssignable(node, isLHS = false) {
if (node != null && this.isObjectProperty(node)) {
const { key, value } = node;
if (this.isPrivateName(key)) {
this.classScope.usePrivateName(
this.getPrivateNameSV(key),
key.loc.start
);
}
this.toAssignable(value, isLHS);
} else {
super.toAssignable(node, isLHS);
}
}
toAssignableObjectExpressionProp(prop) {
if (prop.kind === 'get' || prop.kind === 'set') {
this.raise(Errors.PatternHasAccessor, {
at: prop.key,
});
} else if (prop.method) {
this.raise(Errors.PatternHasMethod, {
at: prop.key,
});
} else {
super.toAssignableObjectExpressionProp(...arguments);
}
}
finishCallExpression(node, optional) {
super.finishCallExpression(node, optional);
if (node.callee.type === 'Import') {
node.type = 'ImportExpression';
node.source = node.arguments[0];
if (this.hasPlugin('importAssertions')) {
var _node$arguments$;
node.attributes =
(_node$arguments$ = node.arguments[1]) != null ?
_node$arguments$
: null;
}
delete node.arguments;
delete node.callee;
}
return node;
}
toReferencedArguments(node) {
if (node.type === 'ImportExpression') {
return;
}
super.toReferencedArguments(node);
}
parseExport(node) {
super.parseExport(node);
switch (node.type) {
case 'ExportAllDeclaration':
node.exported = null;
break;
case 'ExportNamedDeclaration':
if (
node.specifiers.length === 1 &&
node.specifiers[0].type === 'ExportNamespaceSpecifier'
) {
node.type = 'ExportAllDeclaration';
node.exported = node.specifiers[0].exported;
delete node.specifiers;
}
break;
}
return node;
}
parseSubscript(base, startPos, startLoc, noCalls, state) {
const node = super.parseSubscript(
base,
startPos,
startLoc,
noCalls,
state
);
if (state.optionalChainMember) {
if (
node.type === 'OptionalMemberExpression' ||
node.type === 'OptionalCallExpression'
) {
node.type = node.type.substring(8);
}
if (state.stop) {
const chain = this.startNodeAtNode(node);
chain.expression = node;
return this.finishNode(chain, 'ChainExpression');
}
} else if (
node.type === 'MemberExpression' ||
node.type === 'CallExpression'
) {
node.optional = false;
}
return node;
}
hasPropertyAsPrivateName(node) {
if (node.type === 'ChainExpression') {
node = node.expression;
}
return super.hasPropertyAsPrivateName(node);
}
isOptionalChain(node) {
return node.type === 'ChainExpression';
}
isObjectProperty(node) {
return node.type === 'Property' && node.kind === 'init' && !node.method;
}
isObjectMethod(node) {
return node.method || node.kind === 'get' || node.kind === 'set';
}
finishNodeAt(node, type, endLoc) {
return toESTreeLocation(super.finishNodeAt(node, type, endLoc));
}
resetStartLocation(node, start, startLoc) {
super.resetStartLocation(node, start, startLoc);
toESTreeLocation(node);
}
resetEndLocation(node, endLoc = this.state.lastTokEndLoc) {
super.resetEndLocation(node, endLoc);
toESTreeLocation(node);
}
};
class TokContext {
constructor(token, preserveSpace) {
this.token = void 0;
this.preserveSpace = void 0;
this.token = token;
this.preserveSpace = !!preserveSpace;
}
}
const types = {
brace: new TokContext('{'),
j_oTag: new TokContext('<tag'),
j_cTag: new TokContext('</tag'),
j_expr: new TokContext('<tag>...</tag>', true),
};
{
types.template = new TokContext('`', true);
}
const beforeExpr = true;
const startsExpr = true;
const isLoop = true;
const isAssign = true;
const prefix = true;
const postfix = true;
class ExportedTokenType {
constructor(label, conf = {}) {
this.label = void 0;
this.keyword = void 0;
this.beforeExpr = void 0;
this.startsExpr = void 0;
this.rightAssociative = void 0;
this.isLoop = void 0;
this.isAssign = void 0;
this.prefix = void 0;
this.postfix = void 0;
this.binop = void 0;
this.label = label;
this.keyword = conf.keyword;
this.beforeExpr = !!conf.beforeExpr;
this.startsExpr = !!conf.startsExpr;
this.rightAssociative = !!conf.rightAssociative;
this.isLoop = !!conf.isLoop;
this.isAssign = !!conf.isAssign;
this.prefix = !!conf.prefix;
this.postfix = !!conf.postfix;
this.binop = conf.binop != null ? conf.binop : null;
{
this.updateContext = null;
}
}
}
const keywords$1 = new Map();
function createKeyword(name, options = {}) {
options.keyword = name;
const token = createToken(name, options);
keywords$1.set(name, token);
return token;
}
function createBinop(name, binop) {
return createToken(name, {
beforeExpr,
binop,
});
}
let tokenTypeCounter = -1;
const tokenTypes = [];
const tokenLabels = [];
const tokenBinops = [];
const tokenBeforeExprs = [];
const tokenStartsExprs = [];
const tokenPrefixes = [];
function createToken(name, options = {}) {
var _options$binop, _options$beforeExpr, _options$startsExpr, _options$prefix;
++tokenTypeCounter;
tokenLabels.push(name);
tokenBinops.push(
(_options$binop = options.binop) != null ? _options$binop : -1
);
tokenBeforeExprs.push(
(_options$beforeExpr = options.beforeExpr) != null ?
_options$beforeExpr
: false
);
tokenStartsExprs.push(
(_options$startsExpr = options.startsExpr) != null ?
_options$startsExpr
: false
);
tokenPrefixes.push(
(_options$prefix = options.prefix) != null ? _options$prefix : false
);
tokenTypes.push(new ExportedTokenType(name, options));
return tokenTypeCounter;
}
function createKeywordLike(name, options = {}) {
var _options$binop2,
_options$beforeExpr2,
_options$startsExpr2,
_options$prefix2;
++tokenTypeCounter;
keywords$1.set(name, tokenTypeCounter);
tokenLabels.push(name);
tokenBinops.push(
(_options$binop2 = options.binop) != null ? _options$binop2 : -1
);
tokenBeforeExprs.push(
(_options$beforeExpr2 = options.beforeExpr) != null ?
_options$beforeExpr2
: false
);
tokenStartsExprs.push(
(_options$startsExpr2 = options.startsExpr) != null ?
_options$startsExpr2
: false
);
tokenPrefixes.push(
(_options$prefix2 = options.prefix) != null ? _options$prefix2 : false
);
tokenTypes.push(new ExportedTokenType('name', options));
return tokenTypeCounter;
}
const tt = {
bracketL: createToken('[', {
beforeExpr,
startsExpr,
}),
bracketHashL: createToken('#[', {
beforeExpr,
startsExpr,
}),
bracketBarL: createToken('[|', {
beforeExpr,
startsExpr,
}),
bracketR: createToken(']'),
bracketBarR: createToken('|]'),
braceL: createToken('{', {
beforeExpr,
startsExpr,
}),
braceBarL: createToken('{|', {
beforeExpr,
startsExpr,
}),
braceHashL: createToken('#{', {
beforeExpr,
startsExpr,
}),
braceR: createToken('}'),
braceBarR: createToken('|}'),
parenL: createToken('(', {
beforeExpr,
startsExpr,
}),
parenR: createToken(')'),
comma: createToken(',', {
beforeExpr,
}),
semi: createToken(';', {
beforeExpr,
}),
colon: createToken(':', {
beforeExpr,
}),
doubleColon: createToken('::', {
beforeExpr,
}),
dot: createToken('.'),
question: createToken('?', {
beforeExpr,
}),
questionDot: createToken('?.'),
arrow: createToken('=>', {
beforeExpr,
}),
template: createToken('template'),
ellipsis: createToken('...', {
beforeExpr,
}),
backQuote: createToken('`', {
startsExpr,
}),
dollarBraceL: createToken('${', {
beforeExpr,
startsExpr,
}),
templateTail: createToken('...`', {
startsExpr,
}),
templateNonTail: createToken('...${', {
beforeExpr,
startsExpr,
}),
at: createToken('@'),
hash: createToken('#', {
startsExpr,
}),
interpreterDirective: createToken('#!...'),
eq: createToken('=', {
beforeExpr,
isAssign,
}),
assign: createToken('_=', {
beforeExpr,
isAssign,
}),
slashAssign: createToken('_=', {
beforeExpr,
isAssign,
}),
xorAssign: createToken('_=', {
beforeExpr,
isAssign,
}),
moduloAssign: createToken('_=', {
beforeExpr,
isAssign,
}),
incDec: createToken('++/--', {
prefix,
postfix,
startsExpr,
}),
bang: createToken('!', {
beforeExpr,
prefix,
startsExpr,
}),
tilde: createToken('~', {
beforeExpr,
prefix,
startsExpr,
}),
doubleCaret: createToken('^^', {
startsExpr,
}),
doubleAt: createToken('@@', {
startsExpr,
}),
pipeline: createBinop('|>', 0),
nullishCoalescing: createBinop('??', 1),
logicalOR: createBinop('||', 1),
logicalAND: createBinop('&&', 2),
bitwiseOR: createBinop('|', 3),
bitwiseXOR: createBinop('^', 4),
bitwiseAND: createBinop('&', 5),
equality: createBinop('==/!=/===/!==', 6),
lt: createBinop('</>/<=/>=', 7),
gt: createBinop('</>/<=/>=', 7),
relational: createBinop('</>/<=/>=', 7),
bitShift: createBinop('<</>>/>>>', 8),
bitShiftL: createBinop('<</>>/>>>', 8),
bitShiftR: createBinop('<</>>/>>>', 8),
plusMin: createToken('+/-', {
beforeExpr,
binop: 9,
prefix,
startsExpr,
}),
modulo: createToken('%', {
binop: 10,
startsExpr,
}),
star: createToken('*', {
binop: 10,
}),
slash: createBinop('/', 10),
exponent: createToken('**', {
beforeExpr,
binop: 11,
rightAssociative: true,
}),
_in: createKeyword('in', {
beforeExpr,
binop: 7,
}),
_instanceof: createKeyword('instanceof', {
beforeExpr,
binop: 7,
}),
_break: createKeyword('break'),
_case: createKeyword('case', {
beforeExpr,
}),
_catch: createKeyword('catch'),
_continue: createKeyword('continue'),
_debugger: createKeyword('debugger'),
_default: createKeyword('default', {
beforeExpr,
}),
_else: createKeyword('else', {
beforeExpr,
}),
_finally: createKeyword('finally'),
_function: createKeyword('function', {
startsExpr,
}),
_if: createKeyword('if'),
_return: createKeyword('return', {
beforeExpr,
}),
_switch: createKeyword('switch'),
_throw: createKeyword('throw', {
beforeExpr,
prefix,
startsExpr,
}),
_try: createKeyword('try'),
_var: createKeyword('var'),
_const: createKeyword('const'),
_with: createKeyword('with'),
_new: createKeyword('new', {
beforeExpr,
startsExpr,
}),
_this: createKeyword('this', {
startsExpr,
}),
_super: createKeyword('super', {
startsExpr,
}),
_class: createKeyword('class', {
startsExpr,
}),
_extends: createKeyword('extends', {
beforeExpr,
}),
_export: createKeyword('export'),
_import: createKeyword('import', {
startsExpr,
}),
_null: createKeyword('null', {
startsExpr,
}),
_true: createKeyword('true', {
startsExpr,
}),
_false: createKeyword('false', {
startsExpr,
}),
_typeof: createKeyword('typeof', {
beforeExpr,
prefix,
startsExpr,
}),
_void: createKeyword('void', {
beforeExpr,
prefix,
startsExpr,
}),
_delete: createKeyword('delete', {
beforeExpr,
prefix,
startsExpr,
}),
_do: createKeyword('do', {
isLoop,
beforeExpr,
}),
_for: createKeyword('for', {
isLoop,
}),
_while: createKeyword('while', {
isLoop,
}),
_as: createKeywordLike('as', {
startsExpr,
}),
_assert: createKeywordLike('assert', {
startsExpr,
}),
_async: createKeywordLike('async', {
startsExpr,
}),
_await: createKeywordLike('await', {
startsExpr,
}),
_from: createKeywordLike('from', {
startsExpr,
}),
_get: createKeywordLike('get', {
startsExpr,
}),
_let: createKeywordLike('let', {
startsExpr,
}),
_meta: createKeywordLike('meta', {
startsExpr,
}),
_of: createKeywordLike('of', {
startsExpr,
}),
_sent: createKeywordLike('sent', {
startsExpr,
}),
_set: createKeywordLike('set', {
startsExpr,
}),
_static: createKeywordLike('static', {
startsExpr,
}),
_yield: createKeywordLike('yield', {
startsExpr,
}),
_asserts: createKeywordLike('asserts', {
startsExpr,
}),
_checks: createKeywordLike('checks', {
startsExpr,
}),
_exports: createKeywordLike('exports', {
startsExpr,
}),
_global: createKeywordLike('global', {
startsExpr,
}),
_implements: createKeywordLike('implements', {
startsExpr,
}),
_intrinsic: createKeywordLike('intrinsic', {
startsExpr,
}),
_infer: createKeywordLike('infer', {
startsExpr,
}),
_is: createKeywordLike('is', {
startsExpr,
}),
_mixins: createKeywordLike('mixins', {
startsExpr,
}),
_proto: createKeywordLike('proto', {
startsExpr,
}),
_require: createKeywordLike('require', {
startsExpr,
}),
_keyof: createKeywordLike('keyof', {
startsExpr,
}),
_readonly: createKeywordLike('readonly', {
startsExpr,
}),
_unique: createKeywordLike('unique', {
startsExpr,
}),
_abstract: createKeywordLike('abstract', {
startsExpr,
}),
_declare: createKeywordLike('declare', {
startsExpr,
}),
_enum: createKeywordLike('enum', {
startsExpr,
}),
_module: createKeywordLike('module', {
startsExpr,
}),
_namespace: createKeywordLike('namespace', {
startsExpr,
}),
_interface: createKeywordLike('interface', {
startsExpr,
}),
_type: createKeywordLike('type', {
startsExpr,
}),
_opaque: createKeywordLike('opaque', {
startsExpr,
}),
name: createToken('name', {
startsExpr,
}),
string: createToken('string', {
startsExpr,
}),
num: createToken('num', {
startsExpr,
}),
bigint: createToken('bigint', {
startsExpr,
}),
decimal: createToken('decimal', {
startsExpr,
}),
regexp: createToken('regexp', {
startsExpr,
}),
privateName: createToken('#name', {
startsExpr,
}),
eof: createToken('eof'),
jsxName: createToken('jsxName'),
jsxText: createToken('jsxText', {
beforeExpr: true,
}),
jsxTagStart: createToken('jsxTagStart', {
startsExpr: true,
}),
jsxTagEnd: createToken('jsxTagEnd'),
placeholder: createToken('%%', {
startsExpr: true,
}),
};
function tokenIsIdentifier(token) {
return token >= 93 && token <= 128;
}
function tokenKeywordOrIdentifierIsKeyword(token) {
return token <= 92;
}
function tokenIsKeywordOrIdentifier(token) {
return token >= 58 && token <= 128;
}
function tokenIsLiteralPropertyName(token) {
return token >= 58 && token <= 132;
}
function tokenComesBeforeExpression(token) {
return tokenBeforeExprs[token];
}
function tokenCanStartExpression(token) {
return tokenStartsExprs[token];
}
function tokenIsAssignment(token) {
return token >= 29 && token <= 33;
}
function tokenIsFlowInterfaceOrTypeOrOpaque(token) {
return token >= 125 && token <= 127;
}
function tokenIsLoop(token) {
return token >= 90 && token <= 92;
}
function tokenIsKeyword(token) {
return token >= 58 && token <= 92;
}
function tokenIsOperator(token) {
return token >= 39 && token <= 59;
}
function tokenIsPostfix(token) {
return token === 34;
}
function tokenIsPrefix(token) {
return tokenPrefixes[token];
}
function tokenIsTSTypeOperator(token) {
return token >= 117 && token <= 119;
}
function tokenIsTSDeclarationStart(token) {
return token >= 120 && token <= 126;
}
function tokenLabelName(token) {
return tokenLabels[token];
}
function tokenOperatorPrecedence(token) {
return tokenBinops[token];
}
function tokenIsBinaryOperator(token) {
return tokenBinops[token] !== -1;
}
function tokenIsRightAssociative(token) {
return token === 57;
}
function tokenIsTemplate(token) {
return token >= 24 && token <= 25;
}
function getExportedToken(token) {
return tokenTypes[token];
}
{
tokenTypes[8].updateContext = (context) => {
context.pop();
};
tokenTypes[5].updateContext =
tokenTypes[7].updateContext =
tokenTypes[23].updateContext =
(context) => {
context.push(types.brace);
};
tokenTypes[22].updateContext = (context) => {
if (context[context.length - 1] === types.template) {
context.pop();
} else {
context.push(types.template);
}
};
tokenTypes[138].updateContext = (context) => {
context.push(types.j_expr, types.j_oTag);
};
}
let nonASCIIidentifierStartChars =
'\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0370-\u0374\u0376\u0377\u037a-\u037d\u037f\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0481\u048a-\u052f\u0531-\u0556\u0559\u0560-\u0588\u05d0-\u05ea\u05ef-\u05f2\u0620-\u064a\u066e\u066f\u0671-\u06d3\u06d5\u06e5\u06e6\u06ee\u06ef\u06fa-\u06fc\u06ff\u0710\u0712-\u072f\u074d-\u07a5\u07b1\u07ca-\u07ea\u07f4\u07f5\u07fa\u0800-\u0815\u081a\u0824\u0828\u0840-\u0858\u0860-\u086a\u0870-\u0887\u0889-\u088e\u08a0-\u08c9\u0904-\u0939\u093d\u0950\u0958-\u0961\u0971-\u0980\u0985-\u098c\u098f\u0990\u0993-\u09a8\u09aa-\u09b0\u09b2\u09b6-\u09b9\u09bd\u09ce\u09dc\u09dd\u09df-\u09e1\u09f0\u09f1\u09fc\u0a05-\u0a0a\u0a0f\u0a10\u0a13-\u0a28\u0a2a-\u0a30\u0a32\u0a33\u0a35\u0a36\u0a38\u0a39\u0a59-\u0a5c\u0a5e\u0a72-\u0a74\u0a85-\u0a8d\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2\u0ab3\u0ab5-\u0ab9\u0abd\u0ad0\u0ae0\u0ae1\u0af9\u0b05-\u0b0c\u0b0f\u0b10\u0b13-\u0b28\u0b2a-\u0b30\u0b32\u0b33\u0b35-\u0b39\u0b3d\u0b5c\u0b5d\u0b5f-\u0b61\u0b71\u0b83\u0b85-\u0b8a\u0b8e-\u0b90\u0b92-\u0b95\u0b99\u0b9a\u0b9c\u0b9e\u0b9f\u0ba3\u0ba4\u0ba8-\u0baa\u0bae-\u0bb9\u0bd0\u0c05-\u0c0c\u0c0e-\u0c10\u0c12-\u0c28\u0c2a-\u0c39\u0c3d\u0c58-\u0c5a\u0c5d\u0c60\u0c61\u0c80\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbd\u0cdd\u0cde\u0ce0\u0ce1\u0cf1\u0cf2\u0d04-\u0d0c\u0d0e-\u0d10\u0d12-\u0d3a\u0d3d\u0d4e\u0d54-\u0d56\u0d5f-\u0d61\u0d7a-\u0d7f\u0d85-\u0d96\u0d9a-\u0db1\u0db3-\u0dbb\u0dbd\u0dc0-\u0dc6\u0e01-\u0e30\u0e32\u0e33\u0e40-\u0e46\u0e81\u0e82\u0e84\u0e86-\u0e8a\u0e8c-\u0ea3\u0ea5\u0ea7-\u0eb0\u0eb2\u0eb3\u0ebd\u0ec0-\u0ec4\u0ec6\u0edc-\u0edf\u0f00\u0f40-\u0f47\u0f49-\u0f6c\u0f88-\u0f8c\u1000-\u102a\u103f\u1050-\u1055\u105a-\u105d\u1061\u1065\u1066\u106e-\u1070\u1075-\u1081\u108e\u10a0-\u10c5\u10c7\u10cd\u10d0-\u10fa\u10fc-\u1248\u124a-\u124d\u1250-\u1256\u1258\u125a-\u125d\u1260-\u1288\u128a-\u128d\u1290-\u12b0\u12b2-\u12b5\u12b8-\u12be\u12c0\u12c2-\u12c5\u12c8-\u12d6\u12d8-\u1310\u1312-\u1315\u1318-\u135a\u1380-\u138f\u13a0-\u13f5\u13f8-\u13fd\u1401-\u166c\u166f-\u167f\u1681-\u169a\u16a0-\u16ea\u16ee-\u16f8\u1700-\u1711\u171f-\u1731\u1740-\u1751\u1760-\u176c\u176e-\u1770\u1780-\u17b3\u17d7\u17dc\u1820-\u1878\u1880-\u18a8\u18aa\u18b0-\u18f5\u1900-\u191e\u1950-\u196d\u1970-\u1974\u1980-\u19ab\u19b0-\u19c9\u1a00-\u1a16\u1a20-\u1a54\u1aa7\u1b05-\u1b33\u1b45-\u1b4c\u1b83-\u1ba0\u1bae\u1baf\u1bba-\u1be5\u1c00-\u1c23\u1c4d-\u1c4f\u1c5a-\u1c7d\u1c80-\u1c88\u1c90-\u1cba\u1cbd-\u1cbf\u1ce9-\u1cec\u1cee-\u1cf3\u1cf5\u1cf6\u1cfa\u1d00-\u1dbf\u1e00-\u1f15\u1f18-\u1f1d\u1f20-\u1f45\u1f48-\u1f4d\u1f50-\u1f57\u1f59\u1f5b\u1f5d\u1f5f-\u1f7d\u1f80-\u1fb4\u1fb6-\u1fbc\u1fbe\u1fc2-\u1fc4\u1fc6-\u1fcc\u1fd0-\u1fd3\u1fd6-\u1fdb\u1fe0-\u1fec\u1ff2-\u1ff4\u1ff6-\u1ffc\u2071\u207f\u2090-\u209c\u2102\u2107\u210a-\u2113\u2115\u2118-\u211d\u2124\u2126\u2128\u212a-\u2139\u213c-\u213f\u2145-\u2149\u214e\u2160-\u2188\u2c00-\u2ce4\u2ceb-\u2cee\u2cf2\u2cf3\u2d00-\u2d25\u2d27\u2d2d\u2d30-\u2d67\u2d6f\u2d80-\u2d96\u2da0-\u2da6\u2da8-\u2dae\u2db0-\u2db6\u2db8-\u2dbe\u2dc0-\u2dc6\u2dc8-\u2dce\u2dd0-\u2dd6\u2dd8-\u2dde\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303c\u3041-\u3096\u309b-\u309f\u30a1-\u30fa\u30fc-\u30ff\u3105-\u312f\u3131-\u318e\u31a0-\u31bf\u31f0-\u31ff\u3400-\u4dbf\u4e00-\ua48c\ua4d0-\ua4fd\ua500-\ua60c\ua610-\ua61f\ua62a\ua62b\ua640-\ua66e\ua67f-\ua69d\ua6a0-\ua6ef\ua717-\ua71f\ua722-\ua788\ua78b-\ua7ca\ua7d0\ua7d1\ua7d3\ua7d5-\ua7d9\ua7f2-\ua801\ua803-\ua805\ua807-\ua80a\ua80c-\ua822\ua840-\ua873\ua882-\ua8b3\ua8f2-\ua8f7\ua8fb\ua8fd\ua8fe\ua90a-\ua925\ua930-\ua946\ua960-\ua97c\ua984-\ua9b2\ua9cf\ua9e0-\ua9e4\ua9e6-\ua9ef\ua9fa-\ua9fe\uaa00-\uaa28\uaa40-\uaa42\uaa44-\uaa4b\uaa60-\uaa76\uaa7a\uaa7e-\uaaaf\uaab1\uaab5\uaab6\uaab9-\uaabd\uaac0\uaac2\uaadb-\uaadd\uaae0-\uaaea\uaaf2-\uaaf4\uab01-\uab06\uab09-\uab0e\uab11-\uab16\uab20-\uab26\uab28-\uab2e\uab30-\uab5a\uab5c-\uab69\uab70-\uabe2\uac00-\ud7a3\ud7b0-\ud7c6\ud7cb-\ud7fb\uf900-\ufa6d\ufa70-\ufad9\ufb00-\ufb06\ufb13-\ufb17\ufb1d\ufb1f-\ufb28\ufb2a-\ufb36\ufb38-\ufb3c\ufb3e\ufb40\ufb41\ufb43\ufb44\ufb46-\ufbb1\ufbd3-\ufd3d\ufd50-\ufd8f\ufd92-\ufdc7\ufdf0-\ufdfb\ufe70-\ufe74\ufe76-\ufefc\uff21-\uff3a\uff41-\uff5a\uff66-\uffbe\uffc2-\uffc7\uffca-\uffcf\uffd2-\uffd7\uffda-\uffdc';
let nonASCIIidentifierChars =
'\u200c\u200d\xb7\u0300-\u036f\u0387\u0483-\u0487\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u0669\u0670\u06d6-\u06dc\u06df-\u06e4\u06e7\u06e8\u06ea-\u06ed\u06f0-\u06f9\u0711\u0730-\u074a\u07a6-\u07b0\u07c0-\u07c9\u07eb-\u07f3\u07fd\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0859-\u085b\u0898-\u089f\u08ca-\u08e1\u08e3-\u0903\u093a-\u093c\u093e-\u094f\u0951-\u0957\u0962\u0963\u0966-\u096f\u0981-\u0983\u09bc\u09be-\u09c4\u09c7\u09c8\u09cb-\u09cd\u09d7\u09e2\u09e3\u09e6-\u09ef\u09fe\u0a01-\u0a03\u0a3c\u0a3e-\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a66-\u0a71\u0a75\u0a81-\u0a83\u0abc\u0abe-\u0ac5\u0ac7-\u0ac9\u0acb-\u0acd\u0ae2\u0ae3\u0ae6-\u0aef\u0afa-\u0aff\u0b01-\u0b03\u0b3c\u0b3e-\u0b44\u0b47\u0b48\u0b4b-\u0b4d\u0b55-\u0b57\u0b62\u0b63\u0b66-\u0b6f\u0b82\u0bbe-\u0bc2\u0bc6-\u0bc8\u0bca-\u0bcd\u0bd7\u0be6-\u0bef\u0c00-\u0c04\u0c3c\u0c3e-\u0c44\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0c66-\u0c6f\u0c81-\u0c83\u0cbc\u0cbe-\u0cc4\u0cc6-\u0cc8\u0cca-\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0ce6-\u0cef\u0d00-\u0d03\u0d3b\u0d3c\u0d3e-\u0d44\u0d46-\u0d48\u0d4a-\u0d4d\u0d57\u0d62\u0d63\u0d66-\u0d6f\u0d81-\u0d83\u0dca\u0dcf-\u0dd4\u0dd6\u0dd8-\u0ddf\u0de6-\u0def\u0df2\u0df3\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0e50-\u0e59\u0eb1\u0eb4-\u0ebc\u0ec8-\u0ecd\u0ed0-\u0ed9\u0f18\u0f19\u0f20-\u0f29\u0f35\u0f37\u0f39\u0f3e\u0f3f\u0f71-\u0f84\u0f86\u0f87\u0f8d-\u0f97\u0f99-\u0fbc\u0fc6\u102b-\u103e\u1040-\u1049\u1056-\u1059\u105e-\u1060\u1062-\u1064\u1067-\u106d\u1071-\u1074\u1082-\u108d\u108f-\u109d\u135d-\u135f\u1369-\u1371\u1712-\u1715\u1732-\u1734\u1752\u1753\u1772\u1773\u17b4-\u17d3\u17dd\u17e0-\u17e9\u180b-\u180d\u180f-\u1819\u18a9\u1920-\u192b\u1930-\u193b\u1946-\u194f\u19d0-\u19da\u1a17-\u1a1b\u1a55-\u1a5e\u1a60-\u1a7c\u1a7f-\u1a89\u1a90-\u1a99\u1ab0-\u1abd\u1abf-\u1ace\u1b00-\u1b04\u1b34-\u1b44\u1b50-\u1b59\u1b6b-\u1b73\u1b80-\u1b82\u1ba1-\u1bad\u1bb0-\u1bb9\u1be6-\u1bf3\u1c24-\u1c37\u1c40-\u1c49\u1c50-\u1c59\u1cd0-\u1cd2\u1cd4-\u1ce8\u1ced\u1cf4\u1cf7-\u1cf9\u1dc0-\u1dff\u203f\u2040\u2054\u20d0-\u20dc\u20e1\u20e5-\u20f0\u2cef-\u2cf1\u2d7f\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua620-\ua629\ua66f\ua674-\ua67d\ua69e\ua69f\ua6f0\ua6f1\ua802\ua806\ua80b\ua823-\ua827\ua82c\ua880\ua881\ua8b4-\ua8c5\ua8d0-\ua8d9\ua8e0-\ua8f1\ua8ff-\ua909\ua926-\ua92d\ua947-\ua953\ua980-\ua983\ua9b3-\ua9c0\ua9d0-\ua9d9\ua9e5\ua9f0-\ua9f9\uaa29-\uaa36\uaa43\uaa4c\uaa4d\uaa50-\uaa59\uaa7b-\uaa7d\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uaaeb-\uaaef\uaaf5\uaaf6\uabe3-\uabea\uabec\uabed\uabf0-\uabf9\ufb1e\ufe00-\ufe0f\ufe20-\ufe2f\ufe33\ufe34\ufe4d-\ufe4f\uff10-\uff19\uff3f';
const nonASCIIidentifierStart = new RegExp(
'[' + nonASCIIidentifierStartChars + ']'
);
const nonASCIIidentifier = new RegExp(
'[' + nonASCIIidentifierStartChars + nonASCIIidentifierChars + ']'
);
nonASCIIidentifierStartChars = nonASCIIidentifierChars = null;
const astralIdentifierStartCodes = [
0, 11, 2, 25, 2, 18, 2, 1, 2, 14, 3, 13, 35, 122, 70, 52, 268, 28, 4, 48, 48,
31, 14, 29, 6, 37, 11, 29, 3, 35, 5, 7, 2, 4, 43, 157, 19, 35, 5, 35, 5, 39,
9, 51, 13, 10, 2, 14, 2, 6, 2, 1, 2, 10, 2, 14, 2, 6, 2, 1, 68, 310, 10, 21,
11, 7, 25, 5, 2, 41, 2, 8, 70, 5, 3, 0, 2, 43, 2, 1, 4, 0, 3, 22, 11, 22, 10,
30, 66, 18, 2, 1, 11, 21, 11, 25, 71, 55, 7, 1, 65, 0, 16, 3, 2, 2, 2, 28, 43,
28, 4, 28, 36, 7, 2, 27, 28, 53, 11, 21, 11, 18, 14, 17, 111, 72, 56, 50, 14,
50, 14, 35, 349, 41, 7, 1, 79, 28, 11, 0, 9, 21, 43, 17, 47, 20, 28, 22, 13,
52, 58, 1, 3, 0, 14, 44, 33, 24, 27, 35, 30, 0, 3, 0, 9, 34, 4, 0, 13, 47, 15,
3, 22, 0, 2, 0, 36, 17, 2, 24, 85, 6, 2, 0, 2, 3, 2, 14, 2, 9, 8, 46, 39, 7,
3, 1, 3, 21, 2, 6, 2, 1, 2, 4, 4, 0, 19, 0, 13, 4, 159, 52, 19, 3, 21, 2, 31,
47, 21, 1, 2, 0, 185, 46, 42, 3, 37, 47, 21, 0, 60, 42, 14, 0, 72, 26, 38, 6,
186, 43, 117, 63, 32, 7, 3, 0, 3, 7, 2, 1, 2, 23, 16, 0, 2, 0, 95, 7, 3, 38,
17, 0, 2, 0, 29, 0, 11, 39, 8, 0, 22, 0, 12, 45, 20, 0, 19, 72, 264, 8, 2, 36,
18, 0, 50, 29, 113, 6, 2, 1, 2, 37, 22, 0, 26, 5, 2, 1, 2, 31, 15, 0, 328, 18,
190, 0, 80, 921, 103, 110, 18, 195, 2637, 96, 16, 1070, 4050, 582, 8634, 568,
8, 30, 18, 78, 18, 29, 19, 47, 17, 3, 32, 20, 6, 18, 689, 63, 129, 74, 6, 0,
67, 12, 65, 1, 2, 0, 29, 6135, 9, 1237, 43, 8, 8936, 3, 2, 6, 2, 1, 2, 290,
46, 2, 18, 3, 9, 395, 2309, 106, 6, 12, 4, 8, 8, 9, 5991, 84, 2, 70, 2, 1, 3,
0, 3, 1, 3, 3, 2, 11, 2, 0, 2, 6, 2, 64, 2, 3, 3, 7, 2, 6, 2, 27, 2, 3, 2, 4,
2, 0, 4, 6, 2, 339, 3, 24, 2, 24, 2, 30, 2, 24, 2, 30, 2, 24, 2, 30, 2, 24, 2,
30, 2, 24, 2, 7, 1845, 30, 482, 44, 11, 6, 17, 0, 322, 29, 19, 43, 1269, 6, 2,
3, 2, 1, 2, 14, 2, 196, 60, 67, 8, 0, 1205, 3, 2, 26, 2, 1, 2, 0, 3, 0, 2, 9,
2, 3, 2, 0, 2, 0, 7, 0, 5, 0, 2, 0, 2, 0, 2, 2, 2, 1, 2, 0, 3, 0, 2, 0, 2, 0,
2, 0, 2, 0, 2, 1, 2, 0, 3, 3, 2, 6, 2, 3, 2, 3, 2, 0, 2, 9, 2, 16, 6, 2, 2, 4,
2, 16, 4421, 42719, 33, 4152, 8, 221, 3, 5761, 15, 7472, 3104, 541, 1507,
4938,
];
const astralIdentifierCodes = [
509, 0, 227, 0, 150, 4, 294, 9, 1368, 2, 2, 1, 6, 3, 41, 2, 5, 0, 166, 1, 574,
3, 9, 9, 370, 1, 154, 10, 50, 3, 123, 2, 54, 14, 32, 10, 3, 1, 11, 3, 46, 10,
8, 0, 46, 9, 7, 2, 37, 13, 2, 9, 6, 1, 45, 0, 13, 2, 49, 13, 9, 3, 2, 11, 83,
11, 7, 0, 161, 11, 6, 9, 7, 3, 56, 1, 2, 6, 3, 1, 3, 2, 10, 0, 11, 1, 3, 6, 4,
4, 193, 17, 10, 9, 5, 0, 82, 19, 13, 9, 214, 6, 3, 8, 28, 1, 83, 16, 16, 9,
82, 12, 9, 9, 84, 14, 5, 9, 243, 14, 166, 9, 71, 5, 2, 1, 3, 3, 2, 0, 2, 1,
13, 9, 120, 6, 3, 6, 4, 0, 29, 9, 41, 6, 2, 3, 9, 0, 10, 10, 47, 15, 406, 7,
2, 7, 17, 9, 57, 21, 2, 13, 123, 5, 4, 0, 2, 1, 2, 6, 2, 0, 9, 9, 49, 4, 2, 1,
2, 4, 9, 9, 330, 3, 19306, 9, 87, 9, 39, 4, 60, 6, 26, 9, 1014, 0, 2, 54, 8,
3, 82, 0, 12, 1, 19628, 1, 4706, 45, 3, 22, 543, 4, 4, 5, 9, 7, 3, 6, 31, 3,
149, 2, 1418, 49, 513, 54, 5, 49, 9, 0, 15, 0, 23, 4, 2, 14, 1361, 6, 2, 16,
3, 6, 2, 1, 2, 4, 262, 6, 10, 9, 357, 0, 62, 13, 1495, 6, 110, 6, 6, 9, 4759,
9, 787719, 239,
];
function isInAstralSet(code, set) {
let pos = 0x10000;
for (let i = 0, length = set.length; i < length; i += 2) {
pos += set[i];
if (pos > code) return false;
pos += set[i + 1];
if (pos >= code) return true;
}
return false;
}
function isIdentifierStart(code) {
if (code < 65) return code === 36;
if (code <= 90) return true;
if (code < 97) return code === 95;
if (code <= 122) return true;
if (code <= 0xffff) {
return (
code >= 0xaa && nonASCIIidentifierStart.test(String.fromCharCode(code))
);
}
return isInAstralSet(code, astralIdentifierStartCodes);
}
function isIdentifierChar(code) {
if (code < 48) return code === 36;
if (code < 58) return true;
if (code < 65) return false;
if (code <= 90) return true;
if (code < 97) return code === 95;
if (code <= 122) return true;
if (code <= 0xffff) {
return code >= 0xaa && nonASCIIidentifier.test(String.fromCharCode(code));
}
return (
isInAstralSet(code, astralIdentifierStartCodes) ||
isInAstralSet(code, astralIdentifierCodes)
);
}
const reservedWords = {
keyword: [
'break',
'case',
'catch',
'continue',
'debugger',
'default',
'do',
'else',
'finally',
'for',
'function',
'if',
'return',
'switch',
'throw',
'try',
'var',
'const',
'while',
'with',
'new',
'this',
'super',
'class',
'extends',
'export',
'import',
'null',
'true',
'false',
'in',
'instanceof',
'typeof',
'void',
'delete',
],
strict: [
'implements',
'interface',
'let',
'package',
'private',
'protected',
'public',
'static',
'yield',
],
strictBind: ['eval', 'arguments'],
};
const keywords = new Set(reservedWords.keyword);
const reservedWordsStrictSet = new Set(reservedWords.strict);
const reservedWordsStrictBindSet = new Set(reservedWords.strictBind);
function isReservedWord(word, inModule) {
return (inModule && word === 'await') || word === 'enum';
}
function isStrictReservedWord(word, inModule) {
return isReservedWord(word, inModule) || reservedWordsStrictSet.has(word);
}
function isStrictBindOnlyReservedWord(word) {
return reservedWordsStrictBindSet.has(word);
}
function isStrictBindReservedWord(word, inModule) {
return (
isStrictReservedWord(word, inModule) || isStrictBindOnlyReservedWord(word)
);
}
function isKeyword(word) {
return keywords.has(word);
}
function isIteratorStart(current, next, next2) {
return current === 64 && next === 64 && isIdentifierStart(next2);
}
const reservedWordLikeSet = new Set([
'break',
'case',
'catch',
'continue',
'debugger',
'default',
'do',
'else',
'finally',
'for',
'function',
'if',
'return',
'switch',
'throw',
'try',
'var',
'const',
'while',
'with',
'new',
'this',
'super',
'class',
'extends',
'export',
'import',
'null',
'true',
'false',
'in',
'instanceof',
'typeof',
'void',
'delete',
'implements',
'interface',
'let',
'package',
'private',
'protected',
'public',
'static',
'yield',
'eval',
'arguments',
'enum',
'await',
]);
function canBeReservedWord(word) {
return reservedWordLikeSet.has(word);
}
const SCOPE_OTHER = 0b000000000,
SCOPE_PROGRAM = 0b000000001,
SCOPE_FUNCTION = 0b000000010,
SCOPE_ARROW = 0b000000100,
SCOPE_SIMPLE_CATCH = 0b000001000,
SCOPE_SUPER = 0b000010000,
SCOPE_DIRECT_SUPER = 0b000100000,
SCOPE_CLASS = 0b001000000,
SCOPE_STATIC_BLOCK = 0b010000000,
SCOPE_TS_MODULE = 0b100000000,
SCOPE_VAR = SCOPE_PROGRAM | SCOPE_FUNCTION | SCOPE_TS_MODULE;
const BIND_KIND_VALUE = 0b000000000001,
BIND_KIND_TYPE = 0b000000000010,
BIND_SCOPE_VAR = 0b000000000100,
BIND_SCOPE_LEXICAL = 0b000000001000,
BIND_SCOPE_FUNCTION = 0b000000010000,
BIND_FLAGS_NONE = 0b000001000000,
BIND_FLAGS_CLASS = 0b000010000000,
BIND_FLAGS_TS_ENUM = 0b000100000000,
BIND_FLAGS_TS_CONST_ENUM = 0b001000000000,
BIND_FLAGS_TS_EXPORT_ONLY = 0b010000000000,
BIND_FLAGS_FLOW_DECLARE_FN = 0b100000000000;
const BIND_CLASS =
BIND_KIND_VALUE | BIND_KIND_TYPE | BIND_SCOPE_LEXICAL | BIND_FLAGS_CLASS,
BIND_LEXICAL = BIND_KIND_VALUE | 0 | BIND_SCOPE_LEXICAL | 0,
BIND_VAR = BIND_KIND_VALUE | 0 | BIND_SCOPE_VAR | 0,
BIND_FUNCTION = BIND_KIND_VALUE | 0 | BIND_SCOPE_FUNCTION | 0,
BIND_TS_INTERFACE = 0 | BIND_KIND_TYPE | 0 | BIND_FLAGS_CLASS,
BIND_TS_TYPE = 0 | BIND_KIND_TYPE | 0 | 0,
BIND_TS_ENUM =
BIND_KIND_VALUE | BIND_KIND_TYPE | BIND_SCOPE_LEXICAL | BIND_FLAGS_TS_ENUM,
BIND_TS_AMBIENT = 0 | 0 | 0 | BIND_FLAGS_TS_EXPORT_ONLY,
BIND_NONE = 0 | 0 | 0 | BIND_FLAGS_NONE,
BIND_OUTSIDE = BIND_KIND_VALUE | 0 | 0 | BIND_FLAGS_NONE,
BIND_TS_CONST_ENUM = BIND_TS_ENUM | BIND_FLAGS_TS_CONST_ENUM,
BIND_TS_NAMESPACE = 0 | 0 | 0 | BIND_FLAGS_TS_EXPORT_ONLY,
BIND_FLOW_DECLARE_FN = BIND_FLAGS_FLOW_DECLARE_FN;
const CLASS_ELEMENT_FLAG_STATIC = 0b100,
CLASS_ELEMENT_KIND_GETTER = 0b010,
CLASS_ELEMENT_KIND_SETTER = 0b001,
CLASS_ELEMENT_KIND_ACCESSOR =
CLASS_ELEMENT_KIND_GETTER | CLASS_ELEMENT_KIND_SETTER;
const CLASS_ELEMENT_STATIC_GETTER =
CLASS_ELEMENT_KIND_GETTER | CLASS_ELEMENT_FLAG_STATIC,
CLASS_ELEMENT_STATIC_SETTER =
CLASS_ELEMENT_KIND_SETTER | CLASS_ELEMENT_FLAG_STATIC,
CLASS_ELEMENT_INSTANCE_GETTER = CLASS_ELEMENT_KIND_GETTER,
CLASS_ELEMENT_INSTANCE_SETTER = CLASS_ELEMENT_KIND_SETTER,
CLASS_ELEMENT_OTHER = 0;
class BaseParser {
constructor() {
this.sawUnambiguousESM = false;
this.ambiguousScriptDifferentAst = false;
}
hasPlugin(pluginConfig) {
if (typeof pluginConfig === 'string') {
return this.plugins.has(pluginConfig);
} else {
const [pluginName, pluginOptions] = pluginConfig;
if (!this.hasPlugin(pluginName)) {
return false;
}
const actualOptions = this.plugins.get(pluginName);
for (const key of Object.keys(pluginOptions)) {
if (
(actualOptions == null ? void 0 : actualOptions[key]) !==
pluginOptions[key]
) {
return false;
}
}
return true;
}
}
getPluginOption(plugin, name) {
var _this$plugins$get;
return (_this$plugins$get = this.plugins.get(plugin)) == null ?
void 0
: _this$plugins$get[name];
}
}
function setTrailingComments(node, comments) {
if (node.trailingComments === undefined) {
node.trailingComments = comments;
} else {
node.trailingComments.unshift(...comments);
}
}
function setLeadingComments(node, comments) {
if (node.leadingComments === undefined) {
node.leadingComments = comments;
} else {
node.leadingComments.unshift(...comments);
}
}
function setInnerComments(node, comments) {
if (node.innerComments === undefined) {
node.innerComments = comments;
} else {
node.innerComments.unshift(...comments);
}
}
function adjustInnerComments(node, elements, commentWS) {
let lastElement = null;
let i = elements.length;
while (lastElement === null && i > 0) {
lastElement = elements[--i];
}
if (lastElement === null || lastElement.start > commentWS.start) {
setInnerComments(node, commentWS.comments);
} else {
setTrailingComments(lastElement, commentWS.comments);
}
}
class CommentsParser extends BaseParser {
addComment(comment) {
if (this.filename) comment.loc.filename = this.filename;
this.state.comments.push(comment);
}
processComment(node) {
const { commentStack } = this.state;
const commentStackLength = commentStack.length;
if (commentStackLength === 0) return;
let i = commentStackLength - 1;
const lastCommentWS = commentStack[i];
if (lastCommentWS.start === node.end) {
lastCommentWS.leadingNode = node;
i--;
}
const { start: nodeStart } = node;
for (; i >= 0; i--) {
const commentWS = commentStack[i];
const commentEnd = commentWS.end;
if (commentEnd > nodeStart) {
commentWS.containingNode = node;
this.finalizeComment(commentWS);
commentStack.splice(i, 1);
} else {
if (commentEnd === nodeStart) {
commentWS.trailingNode = node;
}
break;
}
}
}
finalizeComment(commentWS) {
const { comments } = commentWS;
if (commentWS.leadingNode !== null || commentWS.trailingNode !== null) {
if (commentWS.leadingNode !== null) {
setTrailingComments(commentWS.leadingNode, comments);
}
if (commentWS.trailingNode !== null) {
setLeadingComments(commentWS.trailingNode, comments);
}
} else {
const { containingNode: node, start: commentStart } = commentWS;
if (this.input.charCodeAt(commentStart - 1) === 44) {
switch (node.type) {
case 'ObjectExpression':
case 'ObjectPattern':
case 'RecordExpression':
adjustInnerComments(node, node.properties, commentWS);
break;
case 'CallExpression':
case 'OptionalCallExpression':
adjustInnerComments(node, node.arguments, commentWS);
break;
case 'FunctionDeclaration':
case 'FunctionExpression':
case 'ArrowFunctionExpression':
case 'ObjectMethod':
case 'ClassMethod':
case 'ClassPrivateMethod':
adjustInnerComments(node, node.params, commentWS);
break;
case 'ArrayExpression':
case 'ArrayPattern':
case 'TupleExpression':
adjustInnerComments(node, node.elements, commentWS);
break;
case 'ExportNamedDeclaration':
case 'ImportDeclaration':
adjustInnerComments(node, node.specifiers, commentWS);
break;
default: {
setInnerComments(node, comments);
}
}
} else {
setInnerComments(node, comments);
}
}
}
finalizeRemainingComments() {
const { commentStack } = this.state;
for (let i = commentStack.length - 1; i >= 0; i--) {
this.finalizeComment(commentStack[i]);
}
this.state.commentStack = [];
}
resetPreviousNodeTrailingComments(node) {
const { commentStack } = this.state;
const { length } = commentStack;
if (length === 0) return;
const commentWS = commentStack[length - 1];
if (commentWS.leadingNode === node) {
commentWS.leadingNode = null;
}
}
takeSurroundingComments(node, start, end) {
const { commentStack } = this.state;
const commentStackLength = commentStack.length;
if (commentStackLength === 0) return;
let i = commentStackLength - 1;
for (; i >= 0; i--) {
const commentWS = commentStack[i];
const commentEnd = commentWS.end;
const commentStart = commentWS.start;
if (commentStart === end) {
commentWS.leadingNode = node;
} else if (commentEnd === start) {
commentWS.trailingNode = node;
} else if (commentEnd < start) {
break;
}
}
}
}
const lineBreak = /\r\n?|[\n\u2028\u2029]/;
const lineBreakG = new RegExp(lineBreak.source, 'g');
function isNewLine(code) {
switch (code) {
case 10:
case 13:
case 8232:
case 8233:
return true;
default:
return false;
}
}
const skipWhiteSpace = /(?:\s|\/\/.*|\/\*[^]*?\*\/)*/g;
const skipWhiteSpaceInLine = /(?:[^\S\n\r\u2028\u2029]|\/\/.*|\/\*.*?\*\/)*/y;
const skipWhiteSpaceToLineBreak = new RegExp(
'(?=(' +
skipWhiteSpaceInLine.source +
'))\\1' +
/(?=[\n\r\u2028\u2029]|\/\*(?!.*?\*\/)|$)/.source,
'y'
);
function isWhitespace(code) {
switch (code) {
case 0x0009:
case 0x000b:
case 0x000c:
case 32:
case 160:
case 5760:
case 0x2000:
case 0x2001:
case 0x2002:
case 0x2003:
case 0x2004:
case 0x2005:
case 0x2006:
case 0x2007:
case 0x2008:
case 0x2009:
case 0x200a:
case 0x202f:
case 0x205f:
case 0x3000:
case 0xfeff:
return true;
default:
return false;
}
}
class State {
constructor() {
this.strict = void 0;
this.curLine = void 0;
this.lineStart = void 0;
this.startLoc = void 0;
this.endLoc = void 0;
this.errors = [];
this.potentialArrowAt = -1;
this.noArrowAt = [];
this.noArrowParamsConversionAt = [];
this.maybeInArrowParameters = false;
this.inType = false;
this.noAnonFunctionType = false;
this.hasFlowComment = false;
this.isAmbientContext = false;
this.inAbstractClass = false;
this.inDisallowConditionalTypesContext = false;
this.topicContext = {
maxNumOfResolvableTopics: 0,
maxTopicIndex: null,
};
this.soloAwait = false;
this.inFSharpPipelineDirectBody = false;
this.labels = [];
this.decoratorStack = [[]];
this.comments = [];
this.commentStack = [];
this.pos = 0;
this.type = 135;
this.value = null;
this.start = 0;
this.end = 0;
this.lastTokEndLoc = null;
this.lastTokStartLoc = null;
this.lastTokStart = 0;
this.context = [types.brace];
this.canStartJSXElement = true;
this.containsEsc = false;
this.strictErrors = new Map();
this.tokensLength = 0;
}
init({ strictMode, sourceType, startLine, startColumn }) {
this.strict =
strictMode === false ? false
: strictMode === true ? true
: sourceType === 'module';
this.curLine = startLine;
this.lineStart = -startColumn;
this.startLoc = this.endLoc = new Position(startLine, startColumn, 0);
}
curPosition() {
return new Position(this.curLine, this.pos - this.lineStart, this.pos);
}
clone(skipArrays) {
const state = new State();
const keys = Object.keys(this);
for (let i = 0, length = keys.length; i < length; i++) {
const key = keys[i];
let val = this[key];
if (!skipArrays && Array.isArray(val)) {
val = val.slice();
}
state[key] = val;
}
return state;
}
}
const _excluded = ['at'],
_excluded2 = ['at'];
var _isDigit = function isDigit(code) {
return code >= 48 && code <= 57;
};
const VALID_REGEX_FLAGS = new Set([103, 109, 115, 105, 121, 117, 100, 118]);
const forbiddenNumericSeparatorSiblings = {
decBinOct: new Set([46, 66, 69, 79, 95, 98, 101, 111]),
hex: new Set([46, 88, 95, 120]),
};
const isAllowedNumericSeparatorSibling = {
bin: (ch) => ch === 48 || ch === 49,
oct: (ch) => ch >= 48 && ch <= 55,
dec: (ch) => ch >= 48 && ch <= 57,
hex: (ch) =>
(ch >= 48 && ch <= 57) || (ch >= 65 && ch <= 70) || (ch >= 97 && ch <= 102),
};
class Token {
constructor(state) {
this.type = state.type;
this.value = state.value;
this.start = state.start;
this.end = state.end;
this.loc = new SourceLocation(state.startLoc, state.endLoc);
}
}
class Tokenizer extends CommentsParser {
constructor(options, input) {
super();
this.isLookahead = void 0;
this.tokens = [];
this.state = new State();
this.state.init(options);
this.input = input;
this.length = input.length;
this.isLookahead = false;
}
pushToken(token) {
this.tokens.length = this.state.tokensLength;
this.tokens.push(token);
++this.state.tokensLength;
}
next() {
this.checkKeywordEscapes();
if (this.options.tokens) {
this.pushToken(new Token(this.state));
}
this.state.lastTokStart = this.state.start;
this.state.lastTokEndLoc = this.state.endLoc;
this.state.lastTokStartLoc = this.state.startLoc;
this.nextToken();
}
eat(type) {
if (this.match(type)) {
this.next();
return true;
} else {
return false;
}
}
match(type) {
return this.state.type === type;
}
createLookaheadState(state) {
return {
pos: state.pos,
value: null,
type: state.type,
start: state.start,
end: state.end,
context: [this.curContext()],
inType: state.inType,
startLoc: state.startLoc,
lastTokEndLoc: state.lastTokEndLoc,
curLine: state.curLine,
lineStart: state.lineStart,
curPosition: state.curPosition,
};
}
lookahead() {
const old = this.state;
this.state = this.createLookaheadState(old);
this.isLookahead = true;
this.nextToken();
this.isLookahead = false;
const curr = this.state;
this.state = old;
return curr;
}
nextTokenStart() {
return this.nextTokenStartSince(this.state.pos);
}
nextTokenStartSince(pos) {
skipWhiteSpace.lastIndex = pos;
return skipWhiteSpace.test(this.input) ? skipWhiteSpace.lastIndex : pos;
}
lookaheadCharCode() {
return this.input.charCodeAt(this.nextTokenStart());
}
codePointAtPos(pos) {
let cp = this.input.charCodeAt(pos);
if ((cp & 0xfc00) === 0xd800 && ++pos < this.input.length) {
const trail = this.input.charCodeAt(pos);
if ((trail & 0xfc00) === 0xdc00) {
cp = 0x10000 + ((cp & 0x3ff) << 10) + (trail & 0x3ff);
}
}
return cp;
}
setStrict(strict) {
this.state.strict = strict;
if (strict) {
this.state.strictErrors.forEach(([toParseError, at]) =>
this.raise(toParseError, {
at,
})
);
this.state.strictErrors.clear();
}
}
curContext() {
return this.state.context[this.state.context.length - 1];
}
nextToken() {
this.skipSpace();
this.state.start = this.state.pos;
if (!this.isLookahead) this.state.startLoc = this.state.curPosition();
if (this.state.pos >= this.length) {
this.finishToken(135);
return;
}
this.getTokenFromCode(this.codePointAtPos(this.state.pos));
}
skipBlockComment() {
let startLoc;
if (!this.isLookahead) startLoc = this.state.curPosition();
const start = this.state.pos;
const end = this.input.indexOf('*/', start + 2);
if (end === -1) {
throw this.raise(Errors.UnterminatedComment, {
at: this.state.curPosition(),
});
}
this.state.pos = end + 2;
lineBreakG.lastIndex = start + 2;
while (lineBreakG.test(this.input) && lineBreakG.lastIndex <= end) {
++this.state.curLine;
this.state.lineStart = lineBreakG.lastIndex;
}
if (this.isLookahead) return;
const comment = {
type: 'CommentBlock',
value: this.input.slice(start + 2, end),
start,
end: end + 2,
loc: new SourceLocation(startLoc, this.state.curPosition()),
};
if (this.options.tokens) this.pushToken(comment);
return comment;
}
skipLineComment(startSkip) {
const start = this.state.pos;
let startLoc;
if (!this.isLookahead) startLoc = this.state.curPosition();
let ch = this.input.charCodeAt((this.state.pos += startSkip));
if (this.state.pos < this.length) {
while (!isNewLine(ch) && ++this.state.pos < this.length) {
ch = this.input.charCodeAt(this.state.pos);
}
}
if (this.isLookahead) return;
const end = this.state.pos;
const value = this.input.slice(start + startSkip, end);
const comment = {
type: 'CommentLine',
value,
start,
end,
loc: new SourceLocation(startLoc, this.state.curPosition()),
};
if (this.options.tokens) this.pushToken(comment);
return comment;
}
skipSpace() {
const spaceStart = this.state.pos;
const comments = [];
loop: while (this.state.pos < this.length) {
const ch = this.input.charCodeAt(this.state.pos);
switch (ch) {
case 32:
case 160:
case 9:
++this.state.pos;
break;
case 13:
if (this.input.charCodeAt(this.state.pos + 1) === 10) {
++this.state.pos;
}
case 10:
case 8232:
case 8233:
++this.state.pos;
++this.state.curLine;
this.state.lineStart = this.state.pos;
break;
case 47:
switch (this.input.charCodeAt(this.state.pos + 1)) {
case 42: {
const comment = this.skipBlockComment();
if (comment !== undefined) {
this.addComment(comment);
if (this.options.attachComment) comments.push(comment);
}
break;
}
case 47: {
const comment = this.skipLineComment(2);
if (comment !== undefined) {
this.addComment(comment);
if (this.options.attachComment) comments.push(comment);
}
break;
}
default:
break loop;
}
break;
default:
if (isWhitespace(ch)) {
++this.state.pos;
} else if (ch === 45 && !this.inModule) {
const pos = this.state.pos;
if (
this.input.charCodeAt(pos + 1) === 45 &&
this.input.charCodeAt(pos + 2) === 62 &&
(spaceStart === 0 || this.state.lineStart > spaceStart)
) {
const comment = this.skipLineComment(3);
if (comment !== undefined) {
this.addComment(comment);
if (this.options.attachComment) comments.push(comment);
}
} else {
break loop;
}
} else if (ch === 60 && !this.inModule) {
const pos = this.state.pos;
if (
this.input.charCodeAt(pos + 1) === 33 &&
this.input.charCodeAt(pos + 2) === 45 &&
this.input.charCodeAt(pos + 3) === 45
) {
const comment = this.skipLineComment(4);
if (comment !== undefined) {
this.addComment(comment);
if (this.options.attachComment) comments.push(comment);
}
} else {
break loop;
}
} else {
break loop;
}
}
}
if (comments.length > 0) {
const end = this.state.pos;
const CommentWhitespace = {
start: spaceStart,
end,
comments,
leadingNode: null,
trailingNode: null,
containingNode: null,
};
this.state.commentStack.push(CommentWhitespace);
}
}
finishToken(type, val) {
this.state.end = this.state.pos;
this.state.endLoc = this.state.curPosition();
const prevType = this.state.type;
this.state.type = type;
this.state.value = val;
if (!this.isLookahead) {
this.updateContext(prevType);
}
}
replaceToken(type) {
this.state.type = type;
this.updateContext();
}
readToken_numberSign() {
if (this.state.pos === 0 && this.readToken_interpreter()) {
return;
}
const nextPos = this.state.pos + 1;
const next = this.codePointAtPos(nextPos);
if (next >= 48 && next <= 57) {
throw this.raise(Errors.UnexpectedDigitAfterHash, {
at: this.state.curPosition(),
});
}
if (next === 123 || (next === 91 && this.hasPlugin('recordAndTuple'))) {
this.expectPlugin('recordAndTuple');
if (this.getPluginOption('recordAndTuple', 'syntaxType') !== 'hash') {
throw this.raise(
next === 123 ?
Errors.RecordExpressionHashIncorrectStartSyntaxType
: Errors.TupleExpressionHashIncorrectStartSyntaxType,
{
at: this.state.curPosition(),
}
);
}
this.state.pos += 2;
if (next === 123) {
this.finishToken(7);
} else {
this.finishToken(1);
}
} else if (isIdentifierStart(next)) {
++this.state.pos;
this.finishToken(134, this.readWord1(next));
} else if (next === 92) {
++this.state.pos;
this.finishToken(134, this.readWord1());
} else {
this.finishOp(27, 1);
}
}
readToken_dot() {
const next = this.input.charCodeAt(this.state.pos + 1);
if (next >= 48 && next <= 57) {
this.readNumber(true);
return;
}
if (next === 46 && this.input.charCodeAt(this.state.pos + 2) === 46) {
this.state.pos += 3;
this.finishToken(21);
} else {
++this.state.pos;
this.finishToken(16);
}
}
readToken_slash() {
const next = this.input.charCodeAt(this.state.pos + 1);
if (next === 61) {
this.finishOp(31, 2);
} else {
this.finishOp(56, 1);
}
}
readToken_interpreter() {
if (this.state.pos !== 0 || this.length < 2) return false;
let ch = this.input.charCodeAt(this.state.pos + 1);
if (ch !== 33) return false;
const start = this.state.pos;
this.state.pos += 1;
while (!isNewLine(ch) && ++this.state.pos < this.length) {
ch = this.input.charCodeAt(this.state.pos);
}
const value = this.input.slice(start + 2, this.state.pos);
this.finishToken(28, value);
return true;
}
readToken_mult_modulo(code) {
let type = code === 42 ? 55 : 54;
let width = 1;
let next = this.input.charCodeAt(this.state.pos + 1);
if (code === 42 && next === 42) {
width++;
next = this.input.charCodeAt(this.state.pos + 2);
type = 57;
}
if (next === 61 && !this.state.inType) {
width++;
type = code === 37 ? 33 : 30;
}
this.finishOp(type, width);
}
readToken_pipe_amp(code) {
const next = this.input.charCodeAt(this.state.pos + 1);
if (next === code) {
if (this.input.charCodeAt(this.state.pos + 2) === 61) {
this.finishOp(30, 3);
} else {
this.finishOp(code === 124 ? 41 : 42, 2);
}
return;
}
if (code === 124) {
if (next === 62) {
this.finishOp(39, 2);
return;
}
if (this.hasPlugin('recordAndTuple') && next === 125) {
if (this.getPluginOption('recordAndTuple', 'syntaxType') !== 'bar') {
throw this.raise(Errors.RecordExpressionBarIncorrectEndSyntaxType, {
at: this.state.curPosition(),
});
}
this.state.pos += 2;
this.finishToken(9);
return;
}
if (this.hasPlugin('recordAndTuple') && next === 93) {
if (this.getPluginOption('recordAndTuple', 'syntaxType') !== 'bar') {
throw this.raise(Errors.TupleExpressionBarIncorrectEndSyntaxType, {
at: this.state.curPosition(),
});
}
this.state.pos += 2;
this.finishToken(4);
return;
}
}
if (next === 61) {
this.finishOp(30, 2);
return;
}
this.finishOp(code === 124 ? 43 : 45, 1);
}
readToken_caret() {
const next = this.input.charCodeAt(this.state.pos + 1);
if (next === 61 && !this.state.inType) {
this.finishOp(32, 2);
} else if (
next === 94 &&
this.hasPlugin([
'pipelineOperator',
{
proposal: 'hack',
topicToken: '^^',
},
])
) {
this.finishOp(37, 2);
const lookaheadCh = this.input.codePointAt(this.state.pos);
if (lookaheadCh === 94) {
throw this.unexpected();
}
} else {
this.finishOp(44, 1);
}
}
readToken_atSign() {
const next = this.input.charCodeAt(this.state.pos + 1);
if (
next === 64 &&
this.hasPlugin([
'pipelineOperator',
{
proposal: 'hack',
topicToken: '@@',
},
])
) {
this.finishOp(38, 2);
} else {
this.finishOp(26, 1);
}
}
readToken_plus_min(code) {
const next = this.input.charCodeAt(this.state.pos + 1);
if (next === code) {
this.finishOp(34, 2);
return;
}
if (next === 61) {
this.finishOp(30, 2);
} else {
this.finishOp(53, 1);
}
}
readToken_lt() {
const { pos } = this.state;
const next = this.input.charCodeAt(pos + 1);
if (next === 60) {
if (this.input.charCodeAt(pos + 2) === 61) {
this.finishOp(30, 3);
return;
}
this.finishOp(51, 2);
return;
}
if (next === 61) {
this.finishOp(49, 2);
return;
}
this.finishOp(47, 1);
}
readToken_gt() {
const { pos } = this.state;
const next = this.input.charCodeAt(pos + 1);
if (next === 62) {
const size = this.input.charCodeAt(pos + 2) === 62 ? 3 : 2;
if (this.input.charCodeAt(pos + size) === 61) {
this.finishOp(30, size + 1);
return;
}
this.finishOp(52, size);
return;
}
if (next === 61) {
this.finishOp(49, 2);
return;
}
this.finishOp(48, 1);
}
readToken_eq_excl(code) {
const next = this.input.charCodeAt(this.state.pos + 1);
if (next === 61) {
this.finishOp(
46,
this.input.charCodeAt(this.state.pos + 2) === 61 ? 3 : 2
);
return;
}
if (code === 61 && next === 62) {
this.state.pos += 2;
this.finishToken(19);
return;
}
this.finishOp(code === 61 ? 29 : 35, 1);
}
readToken_question() {
const next = this.input.charCodeAt(this.state.pos + 1);
const next2 = this.input.charCodeAt(this.state.pos + 2);
if (next === 63) {
if (next2 === 61) {
this.finishOp(30, 3);
} else {
this.finishOp(40, 2);
}
} else if (next === 46 && !(next2 >= 48 && next2 <= 57)) {
this.state.pos += 2;
this.finishToken(18);
} else {
++this.state.pos;
this.finishToken(17);
}
}
getTokenFromCode(code) {
switch (code) {
case 46:
this.readToken_dot();
return;
case 40:
++this.state.pos;
this.finishToken(10);
return;
case 41:
++this.state.pos;
this.finishToken(11);
return;
case 59:
++this.state.pos;
this.finishToken(13);
return;
case 44:
++this.state.pos;
this.finishToken(12);
return;
case 91:
if (
this.hasPlugin('recordAndTuple') &&
this.input.charCodeAt(this.state.pos + 1) === 124
) {
if (this.getPluginOption('recordAndTuple', 'syntaxType') !== 'bar') {
throw this.raise(
Errors.TupleExpressionBarIncorrectStartSyntaxType,
{
at: this.state.curPosition(),
}
);
}
this.state.pos += 2;
this.finishToken(2);
} else {
++this.state.pos;
this.finishToken(0);
}
return;
case 93:
++this.state.pos;
this.finishToken(3);
return;
case 123:
if (
this.hasPlugin('recordAndTuple') &&
this.input.charCodeAt(this.state.pos + 1) === 124
) {
if (this.getPluginOption('recordAndTuple', 'syntaxType') !== 'bar') {
throw this.raise(
Errors.RecordExpressionBarIncorrectStartSyntaxType,
{
at: this.state.curPosition(),
}
);
}
this.state.pos += 2;
this.finishToken(6);
} else {
++this.state.pos;
this.finishToken(5);
}
return;
case 125:
++this.state.pos;
this.finishToken(8);
return;
case 58:
if (
this.hasPlugin('functionBind') &&
this.input.charCodeAt(this.state.pos + 1) === 58
) {
this.finishOp(15, 2);
} else {
++this.state.pos;
this.finishToken(14);
}
return;
case 63:
this.readToken_question();
return;
case 96:
this.readTemplateToken();
return;
case 48: {
const next = this.input.charCodeAt(this.state.pos + 1);
if (next === 120 || next === 88) {
this.readRadixNumber(16);
return;
}
if (next === 111 || next === 79) {
this.readRadixNumber(8);
return;
}
if (next === 98 || next === 66) {
this.readRadixNumber(2);
return;
}
}
case 49:
case 50:
case 51:
case 52:
case 53:
case 54:
case 55:
case 56:
case 57:
this.readNumber(false);
return;
case 34:
case 39:
this.readString(code);
return;
case 47:
this.readToken_slash();
return;
case 37:
case 42:
this.readToken_mult_modulo(code);
return;
case 124:
case 38:
this.readToken_pipe_amp(code);
return;
case 94:
this.readToken_caret();
return;
case 43:
case 45:
this.readToken_plus_min(code);
return;
case 60:
this.readToken_lt();
return;
case 62:
this.readToken_gt();
return;
case 61:
case 33:
this.readToken_eq_excl(code);
return;
case 126:
this.finishOp(36, 1);
return;
case 64:
this.readToken_atSign();
return;
case 35:
this.readToken_numberSign();
return;
case 92:
this.readWord();
return;
default:
if (isIdentifierStart(code)) {
this.readWord(code);
return;
}
}
throw this.raise(Errors.InvalidOrUnexpectedToken, {
at: this.state.curPosition(),
unexpected: String.fromCodePoint(code),
});
}
finishOp(type, size) {
const str = this.input.slice(this.state.pos, this.state.pos + size);
this.state.pos += size;
this.finishToken(type, str);
}
readRegexp() {
const startLoc = this.state.startLoc;
const start = this.state.start + 1;
let escaped, inClass;
let { pos } = this.state;
for (; ; ++pos) {
if (pos >= this.length) {
throw this.raise(Errors.UnterminatedRegExp, {
at: createPositionWithColumnOffset(startLoc, 1),
});
}
const ch = this.input.charCodeAt(pos);
if (isNewLine(ch)) {
throw this.raise(Errors.UnterminatedRegExp, {
at: createPositionWithColumnOffset(startLoc, 1),
});
}
if (escaped) {
escaped = false;
} else {
if (ch === 91) {
inClass = true;
} else if (ch === 93 && inClass) {
inClass = false;
} else if (ch === 47 && !inClass) {
break;
}
escaped = ch === 92;
}
}
const content = this.input.slice(start, pos);
++pos;
let mods = '';
const nextPos = () =>
createPositionWithColumnOffset(startLoc, pos + 2 - start);
while (pos < this.length) {
const cp = this.codePointAtPos(pos);
const char = String.fromCharCode(cp);
if (VALID_REGEX_FLAGS.has(cp)) {
if (cp === 118) {
this.expectPlugin('regexpUnicodeSets', nextPos());
if (mods.includes('u')) {
this.raise(Errors.IncompatibleRegExpUVFlags, {
at: nextPos(),
});
}
} else if (cp === 117) {
if (mods.includes('v')) {
this.raise(Errors.IncompatibleRegExpUVFlags, {
at: nextPos(),
});
}
}
if (mods.includes(char)) {
this.raise(Errors.DuplicateRegExpFlags, {
at: nextPos(),
});
}
} else if (isIdentifierChar(cp) || cp === 92) {
this.raise(Errors.MalformedRegExpFlags, {
at: nextPos(),
});
} else {
break;
}
++pos;
mods += char;
}
this.state.pos = pos;
this.finishToken(133, {
pattern: content,
flags: mods,
});
}
readInt(radix, len, forceLen, allowNumSeparator = true) {
const start = this.state.pos;
const forbiddenSiblings =
radix === 16 ?
forbiddenNumericSeparatorSiblings.hex
: forbiddenNumericSeparatorSiblings.decBinOct;
const isAllowedSibling =
radix === 16 ? isAllowedNumericSeparatorSibling.hex
: radix === 10 ? isAllowedNumericSeparatorSibling.dec
: radix === 8 ? isAllowedNumericSeparatorSibling.oct
: isAllowedNumericSeparatorSibling.bin;
let invalid = false;
let total = 0;
for (let i = 0, e = len == null ? Infinity : len; i < e; ++i) {
const code = this.input.charCodeAt(this.state.pos);
let val;
if (code === 95 && allowNumSeparator !== 'bail') {
const prev = this.input.charCodeAt(this.state.pos - 1);
const next = this.input.charCodeAt(this.state.pos + 1);
if (!allowNumSeparator) {
this.raise(Errors.NumericSeparatorInEscapeSequence, {
at: this.state.curPosition(),
});
} else if (
Number.isNaN(next) ||
!isAllowedSibling(next) ||
forbiddenSiblings.has(prev) ||
forbiddenSiblings.has(next)
) {
this.raise(Errors.UnexpectedNumericSeparator, {
at: this.state.curPosition(),
});
}
++this.state.pos;
continue;
}
if (code >= 97) {
val = code - 97 + 10;
} else if (code >= 65) {
val = code - 65 + 10;
} else if (_isDigit(code)) {
val = code - 48;
} else {
val = Infinity;
}
if (val >= radix) {
if (this.options.errorRecovery && val <= 9) {
val = 0;
this.raise(Errors.InvalidDigit, {
at: this.state.curPosition(),
radix,
});
} else if (forceLen) {
val = 0;
invalid = true;
} else {
break;
}
}
++this.state.pos;
total = total * radix + val;
}
if (
this.state.pos === start ||
(len != null && this.state.pos - start !== len) ||
invalid
) {
return null;
}
return total;
}
readRadixNumber(radix) {
const startLoc = this.state.curPosition();
let isBigInt = false;
this.state.pos += 2;
const val = this.readInt(radix);
if (val == null) {
this.raise(Errors.InvalidDigit, {
at: createPositionWithColumnOffset(startLoc, 2),
radix,
});
}
const next = this.input.charCodeAt(this.state.pos);
if (next === 110) {
++this.state.pos;
isBigInt = true;
} else if (next === 109) {
throw this.raise(Errors.InvalidDecimal, {
at: startLoc,
});
}
if (isIdentifierStart(this.codePointAtPos(this.state.pos))) {
throw this.raise(Errors.NumberIdentifier, {
at: this.state.curPosition(),
});
}
if (isBigInt) {
const str = this.input
.slice(startLoc.index, this.state.pos)
.replace(/[_n]/g, '');
this.finishToken(131, str);
return;
}
this.finishToken(130, val);
}
readNumber(startsWithDot) {
const start = this.state.pos;
const startLoc = this.state.curPosition();
let isFloat = false;
let isBigInt = false;
let isDecimal = false;
let hasExponent = false;
let isOctal = false;
if (!startsWithDot && this.readInt(10) === null) {
this.raise(Errors.InvalidNumber, {
at: this.state.curPosition(),
});
}
const hasLeadingZero =
this.state.pos - start >= 2 && this.input.charCodeAt(start) === 48;
if (hasLeadingZero) {
const integer = this.input.slice(start, this.state.pos);
this.recordStrictModeErrors(Errors.StrictOctalLiteral, {
at: startLoc,
});
if (!this.state.strict) {
const underscorePos = integer.indexOf('_');
if (underscorePos > 0) {
this.raise(Errors.ZeroDigitNumericSeparator, {
at: createPositionWithColumnOffset(startLoc, underscorePos),
});
}
}
isOctal = hasLeadingZero && !/[89]/.test(integer);
}
let next = this.input.charCodeAt(this.state.pos);
if (next === 46 && !isOctal) {
++this.state.pos;
this.readInt(10);
isFloat = true;
next = this.input.charCodeAt(this.state.pos);
}
if ((next === 69 || next === 101) && !isOctal) {
next = this.input.charCodeAt(++this.state.pos);
if (next === 43 || next === 45) {
++this.state.pos;
}
if (this.readInt(10) === null) {
this.raise(Errors.InvalidOrMissingExponent, {
at: startLoc,
});
}
isFloat = true;
hasExponent = true;
next = this.input.charCodeAt(this.state.pos);
}
if (next === 110) {
if (isFloat || hasLeadingZero) {
this.raise(Errors.InvalidBigIntLiteral, {
at: startLoc,
});
}
++this.state.pos;
isBigInt = true;
}
if (next === 109) {
this.expectPlugin('decimal', this.state.curPosition());
if (hasExponent || hasLeadingZero) {
this.raise(Errors.InvalidDecimal, {
at: startLoc,
});
}
++this.state.pos;
isDecimal = true;
}
if (isIdentifierStart(this.codePointAtPos(this.state.pos))) {
throw this.raise(Errors.NumberIdentifier, {
at: this.state.curPosition(),
});
}
const str = this.input.slice(start, this.state.pos).replace(/[_mn]/g, '');
if (isBigInt) {
this.finishToken(131, str);
return;
}
if (isDecimal) {
this.finishToken(132, str);
return;
}
const val = isOctal ? parseInt(str, 8) : parseFloat(str);
this.finishToken(130, val);
}
readCodePoint(throwOnInvalid) {
const ch = this.input.charCodeAt(this.state.pos);
let code;
if (ch === 123) {
++this.state.pos;
code = this.readHexChar(
this.input.indexOf('}', this.state.pos) - this.state.pos,
true,
throwOnInvalid
);
++this.state.pos;
if (code !== null && code > 0x10ffff) {
if (throwOnInvalid) {
this.raise(Errors.InvalidCodePoint, {
at: this.state.curPosition(),
});
} else {
return null;
}
}
} else {
code = this.readHexChar(4, false, throwOnInvalid);
}
return code;
}
readString(quote) {
let out = '',
chunkStart = ++this.state.pos;
for (;;) {
if (this.state.pos >= this.length) {
throw this.raise(Errors.UnterminatedString, {
at: this.state.startLoc,
});
}
const ch = this.input.charCodeAt(this.state.pos);
if (ch === quote) break;
if (ch === 92) {
out += this.input.slice(chunkStart, this.state.pos);
out += this.readEscapedChar(false);
chunkStart = this.state.pos;
} else if (ch === 8232 || ch === 8233) {
++this.state.pos;
++this.state.curLine;
this.state.lineStart = this.state.pos;
} else if (isNewLine(ch)) {
throw this.raise(Errors.UnterminatedString, {
at: this.state.startLoc,
});
} else {
++this.state.pos;
}
}
out += this.input.slice(chunkStart, this.state.pos++);
this.finishToken(129, out);
}
readTemplateContinuation() {
if (!this.match(8)) {
this.unexpected(null, 8);
}
this.state.pos--;
this.readTemplateToken();
}
readTemplateToken() {
let out = '',
chunkStart = this.state.pos,
containsInvalid = false;
++this.state.pos;
for (;;) {
if (this.state.pos >= this.length) {
throw this.raise(Errors.UnterminatedTemplate, {
at: createPositionWithColumnOffset(this.state.startLoc, 1),
});
}
const ch = this.input.charCodeAt(this.state.pos);
if (ch === 96) {
++this.state.pos;
out += this.input.slice(chunkStart, this.state.pos);
this.finishToken(24, containsInvalid ? null : out);
return;
}
if (ch === 36 && this.input.charCodeAt(this.state.pos + 1) === 123) {
this.state.pos += 2;
out += this.input.slice(chunkStart, this.state.pos);
this.finishToken(25, containsInvalid ? null : out);
return;
}
if (ch === 92) {
out += this.input.slice(chunkStart, this.state.pos);
const escaped = this.readEscapedChar(true);
if (escaped === null) {
containsInvalid = true;
} else {
out += escaped;
}
chunkStart = this.state.pos;
} else if (isNewLine(ch)) {
out += this.input.slice(chunkStart, this.state.pos);
++this.state.pos;
switch (ch) {
case 13:
if (this.input.charCodeAt(this.state.pos) === 10) {
++this.state.pos;
}
case 10:
out += '\n';
break;
default:
out += String.fromCharCode(ch);
break;
}
++this.state.curLine;
this.state.lineStart = this.state.pos;
chunkStart = this.state.pos;
} else {
++this.state.pos;
}
}
}
recordStrictModeErrors(toParseError, { at }) {
const index = at.index;
if (this.state.strict && !this.state.strictErrors.has(index)) {
this.raise(toParseError, {
at,
});
} else {
this.state.strictErrors.set(index, [toParseError, at]);
}
}
readEscapedChar(inTemplate) {
const throwOnInvalid = !inTemplate;
const ch = this.input.charCodeAt(++this.state.pos);
++this.state.pos;
switch (ch) {
case 110:
return '\n';
case 114:
return '\r';
case 120: {
const code = this.readHexChar(2, false, throwOnInvalid);
return code === null ? null : String.fromCharCode(code);
}
case 117: {
const code = this.readCodePoint(throwOnInvalid);
return code === null ? null : String.fromCodePoint(code);
}
case 116:
return '\t';
case 98:
return '\b';
case 118:
return '\u000b';
case 102:
return '\f';
case 13:
if (this.input.charCodeAt(this.state.pos) === 10) {
++this.state.pos;
}
case 10:
this.state.lineStart = this.state.pos;
++this.state.curLine;
case 8232:
case 8233:
return '';
case 56:
case 57:
if (inTemplate) {
return null;
} else {
this.recordStrictModeErrors(Errors.StrictNumericEscape, {
at: createPositionWithColumnOffset(this.state.curPosition(), -1),
});
}
default:
if (ch >= 48 && ch <= 55) {
const codePos = createPositionWithColumnOffset(
this.state.curPosition(),
-1
);
const match = this.input
.slice(this.state.pos - 1, this.state.pos + 2)
.match(/^[0-7]+/);
let octalStr = match[0];
let octal = parseInt(octalStr, 8);
if (octal > 255) {
octalStr = octalStr.slice(0, -1);
octal = parseInt(octalStr, 8);
}
this.state.pos += octalStr.length - 1;
const next = this.input.charCodeAt(this.state.pos);
if (octalStr !== '0' || next === 56 || next === 57) {
if (inTemplate) {
return null;
} else {
this.recordStrictModeErrors(Errors.StrictNumericEscape, {
at: codePos,
});
}
}
return String.fromCharCode(octal);
}
return String.fromCharCode(ch);
}
}
readHexChar(len, forceLen, throwOnInvalid) {
const codeLoc = this.state.curPosition();
const n = this.readInt(16, len, forceLen, false);
if (n === null) {
if (throwOnInvalid) {
this.raise(Errors.InvalidEscapeSequence, {
at: codeLoc,
});
} else {
this.state.pos = codeLoc.index - 1;
}
}
return n;
}
readWord1(firstCode) {
this.state.containsEsc = false;
let word = '';
const start = this.state.pos;
let chunkStart = this.state.pos;
if (firstCode !== undefined) {
this.state.pos += firstCode <= 0xffff ? 1 : 2;
}
while (this.state.pos < this.length) {
const ch = this.codePointAtPos(this.state.pos);
if (isIdentifierChar(ch)) {
this.state.pos += ch <= 0xffff ? 1 : 2;
} else if (ch === 92) {
this.state.containsEsc = true;
word += this.input.slice(chunkStart, this.state.pos);
const escStart = this.state.curPosition();
const identifierCheck =
this.state.pos === start ? isIdentifierStart : isIdentifierChar;
if (this.input.charCodeAt(++this.state.pos) !== 117) {
this.raise(Errors.MissingUnicodeEscape, {
at: this.state.curPosition(),
});
chunkStart = this.state.pos - 1;
continue;
}
++this.state.pos;
const esc = this.readCodePoint(true);
if (esc !== null) {
if (!identifierCheck(esc)) {
this.raise(Errors.EscapedCharNotAnIdentifier, {
at: escStart,
});
}
word += String.fromCodePoint(esc);
}
chunkStart = this.state.pos;
} else {
break;
}
}
return word + this.input.slice(chunkStart, this.state.pos);
}
readWord(firstCode) {
const word = this.readWord1(firstCode);
const type = keywords$1.get(word);
if (type !== undefined) {
this.finishToken(type, tokenLabelName(type));
} else {
this.finishToken(128, word);
}
}
checkKeywordEscapes() {
const { type } = this.state;
if (tokenIsKeyword(type) && this.state.containsEsc) {
this.raise(Errors.InvalidEscapedReservedWord, {
at: this.state.startLoc,
reservedWord: tokenLabelName(type),
});
}
}
raise(toParseError, raiseProperties) {
const { at } = raiseProperties,
details = _objectWithoutPropertiesLoose(raiseProperties, _excluded);
const loc = at instanceof Position ? at : at.loc.start;
const error = toParseError({
loc,
details,
});
if (!this.options.errorRecovery) throw error;
if (!this.isLookahead) this.state.errors.push(error);
return error;
}
raiseOverwrite(toParseError, raiseProperties) {
const { at } = raiseProperties,
details = _objectWithoutPropertiesLoose(raiseProperties, _excluded2);
const loc = at instanceof Position ? at : at.loc.start;
const pos = loc.index;
const errors = this.state.errors;
for (let i = errors.length - 1; i >= 0; i--) {
const error = errors[i];
if (error.loc.index === pos) {
return (errors[i] = toParseError({
loc,
details,
}));
}
if (error.loc.index < pos) break;
}
return this.raise(toParseError, raiseProperties);
}
updateContext(prevType) {}
unexpected(loc, type) {
throw this.raise(Errors.UnexpectedToken, {
expected: type ? tokenLabelName(type) : null,
at: loc != null ? loc : this.state.startLoc,
});
}
expectPlugin(pluginName, loc) {
if (this.hasPlugin(pluginName)) {
return true;
}
throw this.raise(Errors.MissingPlugin, {
at: loc != null ? loc : this.state.startLoc,
missingPlugin: [pluginName],
});
}
expectOnePlugin(pluginNames) {
if (!pluginNames.some((name) => this.hasPlugin(name))) {
throw this.raise(Errors.MissingOneOfPlugins, {
at: this.state.startLoc,
missingPlugin: pluginNames,
});
}
}
}
class Scope {
constructor(flags) {
this.var = new Set();
this.lexical = new Set();
this.functions = new Set();
this.flags = flags;
}
}
class ScopeHandler {
constructor(parser, inModule) {
this.parser = void 0;
this.scopeStack = [];
this.inModule = void 0;
this.undefinedExports = new Map();
this.parser = parser;
this.inModule = inModule;
}
get inFunction() {
return (this.currentVarScopeFlags() & SCOPE_FUNCTION) > 0;
}
get allowSuper() {
return (this.currentThisScopeFlags() & SCOPE_SUPER) > 0;
}
get allowDirectSuper() {
return (this.currentThisScopeFlags() & SCOPE_DIRECT_SUPER) > 0;
}
get inClass() {
return (this.currentThisScopeFlags() & SCOPE_CLASS) > 0;
}
get inClassAndNotInNonArrowFunction() {
const flags = this.currentThisScopeFlags();
return (flags & SCOPE_CLASS) > 0 && (flags & SCOPE_FUNCTION) === 0;
}
get inStaticBlock() {
for (let i = this.scopeStack.length - 1; ; i--) {
const { flags } = this.scopeStack[i];
if (flags & SCOPE_STATIC_BLOCK) {
return true;
}
if (flags & (SCOPE_VAR | SCOPE_CLASS)) {
return false;
}
}
}
get inNonArrowFunction() {
return (this.currentThisScopeFlags() & SCOPE_FUNCTION) > 0;
}
get treatFunctionsAsVar() {
return this.treatFunctionsAsVarInScope(this.currentScope());
}
createScope(flags) {
return new Scope(flags);
}
enter(flags) {
this.scopeStack.push(this.createScope(flags));
}
exit() {
this.scopeStack.pop();
}
treatFunctionsAsVarInScope(scope) {
return !!(
scope.flags & (SCOPE_FUNCTION | SCOPE_STATIC_BLOCK) ||
(!this.parser.inModule && scope.flags & SCOPE_PROGRAM)
);
}
declareName(name, bindingType, loc) {
let scope = this.currentScope();
if (bindingType & BIND_SCOPE_LEXICAL || bindingType & BIND_SCOPE_FUNCTION) {
this.checkRedeclarationInScope(scope, name, bindingType, loc);
if (bindingType & BIND_SCOPE_FUNCTION) {
scope.functions.add(name);
} else {
scope.lexical.add(name);
}
if (bindingType & BIND_SCOPE_LEXICAL) {
this.maybeExportDefined(scope, name);
}
} else if (bindingType & BIND_SCOPE_VAR) {
for (let i = this.scopeStack.length - 1; i >= 0; --i) {
scope = this.scopeStack[i];
this.checkRedeclarationInScope(scope, name, bindingType, loc);
scope.var.add(name);
this.maybeExportDefined(scope, name);
if (scope.flags & SCOPE_VAR) break;
}
}
if (this.parser.inModule && scope.flags & SCOPE_PROGRAM) {
this.undefinedExports.delete(name);
}
}
maybeExportDefined(scope, name) {
if (this.parser.inModule && scope.flags & SCOPE_PROGRAM) {
this.undefinedExports.delete(name);
}
}
checkRedeclarationInScope(scope, name, bindingType, loc) {
if (this.isRedeclaredInScope(scope, name, bindingType)) {
this.parser.raise(Errors.VarRedeclaration, {
at: loc,
identifierName: name,
});
}
}
isRedeclaredInScope(scope, name, bindingType) {
if (!(bindingType & BIND_KIND_VALUE)) return false;
if (bindingType & BIND_SCOPE_LEXICAL) {
return (
scope.lexical.has(name) ||
scope.functions.has(name) ||
scope.var.has(name)
);
}
if (bindingType & BIND_SCOPE_FUNCTION) {
return (
scope.lexical.has(name) ||
(!this.treatFunctionsAsVarInScope(scope) && scope.var.has(name))
);
}
return (
(scope.lexical.has(name) &&
!(
scope.flags & SCOPE_SIMPLE_CATCH &&
scope.lexical.values().next().value === name
)) ||
(!this.treatFunctionsAsVarInScope(scope) && scope.functions.has(name))
);
}
checkLocalExport(id) {
const { name } = id;
const topLevelScope = this.scopeStack[0];
if (
!topLevelScope.lexical.has(name) &&
!topLevelScope.var.has(name) &&
!topLevelScope.functions.has(name)
) {
this.undefinedExports.set(name, id.loc.start);
}
}
currentScope() {
return this.scopeStack[this.scopeStack.length - 1];
}
currentVarScopeFlags() {
for (let i = this.scopeStack.length - 1; ; i--) {
const { flags } = this.scopeStack[i];
if (flags & SCOPE_VAR) {
return flags;
}
}
}
currentThisScopeFlags() {
for (let i = this.scopeStack.length - 1; ; i--) {
const { flags } = this.scopeStack[i];
if (flags & (SCOPE_VAR | SCOPE_CLASS) && !(flags & SCOPE_ARROW)) {
return flags;
}
}
}
}
class FlowScope extends Scope {
constructor(...args) {
super(...args);
this.declareFunctions = new Set();
}
}
class FlowScopeHandler extends ScopeHandler {
createScope(flags) {
return new FlowScope(flags);
}
declareName(name, bindingType, loc) {
const scope = this.currentScope();
if (bindingType & BIND_FLAGS_FLOW_DECLARE_FN) {
this.checkRedeclarationInScope(scope, name, bindingType, loc);
this.maybeExportDefined(scope, name);
scope.declareFunctions.add(name);
return;
}
super.declareName(...arguments);
}
isRedeclaredInScope(scope, name, bindingType) {
if (super.isRedeclaredInScope(...arguments)) return true;
if (bindingType & BIND_FLAGS_FLOW_DECLARE_FN) {
return (
!scope.declareFunctions.has(name) &&
(scope.lexical.has(name) || scope.functions.has(name))
);
}
return false;
}
checkLocalExport(id) {
if (!this.scopeStack[0].declareFunctions.has(id.name)) {
super.checkLocalExport(id);
}
}
}
class ClassScope {
constructor() {
this.privateNames = new Set();
this.loneAccessors = new Map();
this.undefinedPrivateNames = new Map();
}
}
class ClassScopeHandler {
constructor(parser) {
this.parser = void 0;
this.stack = [];
this.undefinedPrivateNames = new Map();
this.parser = parser;
}
current() {
return this.stack[this.stack.length - 1];
}
enter() {
this.stack.push(new ClassScope());
}
exit() {
const oldClassScope = this.stack.pop();
const current = this.current();
for (const [name, loc] of Array.from(oldClassScope.undefinedPrivateNames)) {
if (current) {
if (!current.undefinedPrivateNames.has(name)) {
current.undefinedPrivateNames.set(name, loc);
}
} else {
this.parser.raise(Errors.InvalidPrivateFieldResolution, {
at: loc,
identifierName: name,
});
}
}
}
declarePrivateName(name, elementType, loc) {
const { privateNames, loneAccessors, undefinedPrivateNames } =
this.current();
let redefined = privateNames.has(name);
if (elementType & CLASS_ELEMENT_KIND_ACCESSOR) {
const accessor = redefined && loneAccessors.get(name);
if (accessor) {
const oldStatic = accessor & CLASS_ELEMENT_FLAG_STATIC;
const newStatic = elementType & CLASS_ELEMENT_FLAG_STATIC;
const oldKind = accessor & CLASS_ELEMENT_KIND_ACCESSOR;
const newKind = elementType & CLASS_ELEMENT_KIND_ACCESSOR;
redefined = oldKind === newKind || oldStatic !== newStatic;
if (!redefined) loneAccessors.delete(name);
} else if (!redefined) {
loneAccessors.set(name, elementType);
}
}
if (redefined) {
this.parser.raise(Errors.PrivateNameRedeclaration, {
at: loc,
identifierName: name,
});
}
privateNames.add(name);
undefinedPrivateNames.delete(name);
}
usePrivateName(name, loc) {
let classScope;
for (classScope of this.stack) {
if (classScope.privateNames.has(name)) return;
}
if (classScope) {
classScope.undefinedPrivateNames.set(name, loc);
} else {
this.parser.raise(Errors.InvalidPrivateFieldResolution, {
at: loc,
identifierName: name,
});
}
}
}
const kExpression = 0,
kMaybeArrowParameterDeclaration = 1,
kMaybeAsyncArrowParameterDeclaration = 2,
kParameterDeclaration = 3;
class ExpressionScope {
constructor(type = kExpression) {
this.type = void 0;
this.type = type;
}
canBeArrowParameterDeclaration() {
return (
this.type === kMaybeAsyncArrowParameterDeclaration ||
this.type === kMaybeArrowParameterDeclaration
);
}
isCertainlyParameterDeclaration() {
return this.type === kParameterDeclaration;
}
}
class ArrowHeadParsingScope extends ExpressionScope {
constructor(type) {
super(type);
this.declarationErrors = new Map();
}
recordDeclarationError(ParsingErrorClass, { at }) {
const index = at.index;
this.declarationErrors.set(index, [ParsingErrorClass, at]);
}
clearDeclarationError(index) {
this.declarationErrors.delete(index);
}
iterateErrors(iterator) {
this.declarationErrors.forEach(iterator);
}
}
class ExpressionScopeHandler {
constructor(parser) {
this.parser = void 0;
this.stack = [new ExpressionScope()];
this.parser = parser;
}
enter(scope) {
this.stack.push(scope);
}
exit() {
this.stack.pop();
}
recordParameterInitializerError(toParseError, { at: node }) {
const origin = {
at: node.loc.start,
};
const { stack } = this;
let i = stack.length - 1;
let scope = stack[i];
while (!scope.isCertainlyParameterDeclaration()) {
if (scope.canBeArrowParameterDeclaration()) {
scope.recordDeclarationError(toParseError, origin);
} else {
return;
}
scope = stack[--i];
}
this.parser.raise(toParseError, origin);
}
recordArrowParemeterBindingError(error, { at: node }) {
const { stack } = this;
const scope = stack[stack.length - 1];
const origin = {
at: node.loc.start,
};
if (scope.isCertainlyParameterDeclaration()) {
this.parser.raise(error, origin);
} else if (scope.canBeArrowParameterDeclaration()) {
scope.recordDeclarationError(error, origin);
} else {
return;
}
}
recordAsyncArrowParametersError({ at }) {
const { stack } = this;
let i = stack.length - 1;
let scope = stack[i];
while (scope.canBeArrowParameterDeclaration()) {
if (scope.type === kMaybeAsyncArrowParameterDeclaration) {
scope.recordDeclarationError(Errors.AwaitBindingIdentifier, {
at,
});
}
scope = stack[--i];
}
}
validateAsPattern() {
const { stack } = this;
const currentScope = stack[stack.length - 1];
if (!currentScope.canBeArrowParameterDeclaration()) return;
currentScope.iterateErrors(([toParseError, loc]) => {
this.parser.raise(toParseError, {
at: loc,
});
let i = stack.length - 2;
let scope = stack[i];
while (scope.canBeArrowParameterDeclaration()) {
scope.clearDeclarationError(loc.index);
scope = stack[--i];
}
});
}
}
function newParameterDeclarationScope() {
return new ExpressionScope(kParameterDeclaration);
}
function newArrowHeadScope() {
return new ArrowHeadParsingScope(kMaybeArrowParameterDeclaration);
}
function newAsyncArrowScope() {
return new ArrowHeadParsingScope(kMaybeAsyncArrowParameterDeclaration);
}
function newExpressionScope() {
return new ExpressionScope();
}
const PARAM = 0b0000,
PARAM_YIELD = 0b0001,
PARAM_AWAIT = 0b0010,
PARAM_RETURN = 0b0100,
PARAM_IN = 0b1000;
class ProductionParameterHandler {
constructor() {
this.stacks = [];
}
enter(flags) {
this.stacks.push(flags);
}
exit() {
this.stacks.pop();
}
currentFlags() {
return this.stacks[this.stacks.length - 1];
}
get hasAwait() {
return (this.currentFlags() & PARAM_AWAIT) > 0;
}
get hasYield() {
return (this.currentFlags() & PARAM_YIELD) > 0;
}
get hasReturn() {
return (this.currentFlags() & PARAM_RETURN) > 0;
}
get hasIn() {
return (this.currentFlags() & PARAM_IN) > 0;
}
}
function functionFlags(isAsync, isGenerator) {
return (isAsync ? PARAM_AWAIT : 0) | (isGenerator ? PARAM_YIELD : 0);
}
class UtilParser extends Tokenizer {
addExtra(node, key, value, enumerable = true) {
if (!node) return;
const extra = (node.extra = node.extra || {});
if (enumerable) {
extra[key] = value;
} else {
Object.defineProperty(extra, key, {
enumerable,
value,
});
}
}
isContextual(token) {
return this.state.type === token && !this.state.containsEsc;
}
isUnparsedContextual(nameStart, name) {
const nameEnd = nameStart + name.length;
if (this.input.slice(nameStart, nameEnd) === name) {
const nextCh = this.input.charCodeAt(nameEnd);
return !(isIdentifierChar(nextCh) || (nextCh & 0xfc00) === 0xd800);
}
return false;
}
isLookaheadContextual(name) {
const next = this.nextTokenStart();
return this.isUnparsedContextual(next, name);
}
eatContextual(token) {
if (this.isContextual(token)) {
this.next();
return true;
}
return false;
}
expectContextual(token, toParseError) {
if (!this.eatContextual(token)) {
if (toParseError != null) {
throw this.raise(toParseError, {
at: this.state.startLoc,
});
}
throw this.unexpected(null, token);
}
}
canInsertSemicolon() {
return this.match(135) || this.match(8) || this.hasPrecedingLineBreak();
}
hasPrecedingLineBreak() {
return lineBreak.test(
this.input.slice(this.state.lastTokEndLoc.index, this.state.start)
);
}
hasFollowingLineBreak() {
skipWhiteSpaceToLineBreak.lastIndex = this.state.end;
return skipWhiteSpaceToLineBreak.test(this.input);
}
isLineTerminator() {
return this.eat(13) || this.canInsertSemicolon();
}
semicolon(allowAsi = true) {
if (allowAsi ? this.isLineTerminator() : this.eat(13)) return;
this.raise(Errors.MissingSemicolon, {
at: this.state.lastTokEndLoc,
});
}
expect(type, loc) {
this.eat(type) || this.unexpected(loc, type);
}
tryParse(fn, oldState = this.state.clone()) {
const abortSignal = {
node: null,
};
try {
const node = fn((node = null) => {
abortSignal.node = node;
throw abortSignal;
});
if (this.state.errors.length > oldState.errors.length) {
const failState = this.state;
this.state = oldState;
this.state.tokensLength = failState.tokensLength;
return {
node,
error: failState.errors[oldState.errors.length],
thrown: false,
aborted: false,
failState,
};
}
return {
node,
error: null,
thrown: false,
aborted: false,
failState: null,
};
} catch (error) {
const failState = this.state;
this.state = oldState;
if (error instanceof SyntaxError) {
return {
node: null,
error,
thrown: true,
aborted: false,
failState,
};
}
if (error === abortSignal) {
return {
node: abortSignal.node,
error: null,
thrown: false,
aborted: true,
failState,
};
}
throw error;
}
}
checkExpressionErrors(refExpressionErrors, andThrow) {
if (!refExpressionErrors) return false;
const {
shorthandAssignLoc,
doubleProtoLoc,
privateKeyLoc,
optionalParametersLoc,
} = refExpressionErrors;
const hasErrors =
!!shorthandAssignLoc ||
!!doubleProtoLoc ||
!!optionalParametersLoc ||
!!privateKeyLoc;
if (!andThrow) {
return hasErrors;
}
if (shorthandAssignLoc != null) {
this.raise(Errors.InvalidCoverInitializedName, {
at: shorthandAssignLoc,
});
}
if (doubleProtoLoc != null) {
this.raise(Errors.DuplicateProto, {
at: doubleProtoLoc,
});
}
if (privateKeyLoc != null) {
this.raise(Errors.UnexpectedPrivateField, {
at: privateKeyLoc,
});
}
if (optionalParametersLoc != null) {
this.unexpected(optionalParametersLoc);
}
}
isLiteralPropertyName() {
return tokenIsLiteralPropertyName(this.state.type);
}
isPrivateName(node) {
return node.type === 'PrivateName';
}
getPrivateNameSV(node) {
return node.id.name;
}
hasPropertyAsPrivateName(node) {
return (
(node.type === 'MemberExpression' ||
node.type === 'OptionalMemberExpression') &&
this.isPrivateName(node.property)
);
}
isOptionalChain(node) {
return (
node.type === 'OptionalMemberExpression' ||
node.type === 'OptionalCallExpression'
);
}
isObjectProperty(node) {
return node.type === 'ObjectProperty';
}
isObjectMethod(node) {
return node.type === 'ObjectMethod';
}
initializeScopes(inModule = this.options.sourceType === 'module') {
const oldLabels = this.state.labels;
this.state.labels = [];
const oldExportedIdentifiers = this.exportedIdentifiers;
this.exportedIdentifiers = new Set();
const oldInModule = this.inModule;
this.inModule = inModule;
const oldScope = this.scope;
const ScopeHandler = this.getScopeHandler();
this.scope = new ScopeHandler(this, inModule);
const oldProdParam = this.prodParam;
this.prodParam = new ProductionParameterHandler();
const oldClassScope = this.classScope;
this.classScope = new ClassScopeHandler(this);
const oldExpressionScope = this.expressionScope;
this.expressionScope = new ExpressionScopeHandler(this);
return () => {
this.state.labels = oldLabels;
this.exportedIdentifiers = oldExportedIdentifiers;
this.inModule = oldInModule;
this.scope = oldScope;
this.prodParam = oldProdParam;
this.classScope = oldClassScope;
this.expressionScope = oldExpressionScope;
};
}
enterInitialScopes() {
let paramFlags = PARAM;
if (this.inModule) {
paramFlags |= PARAM_AWAIT;
}
this.scope.enter(SCOPE_PROGRAM);
this.prodParam.enter(paramFlags);
}
checkDestructuringPrivate(refExpressionErrors) {
const { privateKeyLoc } = refExpressionErrors;
if (privateKeyLoc !== null) {
this.expectPlugin('destructuringPrivate', privateKeyLoc);
}
}
}
class ExpressionErrors {
constructor() {
this.shorthandAssignLoc = null;
this.doubleProtoLoc = null;
this.privateKeyLoc = null;
this.optionalParametersLoc = null;
}
}
class Node {
constructor(parser, pos, loc) {
this.type = '';
this.start = pos;
this.end = 0;
this.loc = new SourceLocation(loc);
if (parser != null && parser.options.ranges) this.range = [pos, 0];
if (parser != null && parser.filename) this.loc.filename = parser.filename;
}
}
const NodePrototype = Node.prototype;
{
NodePrototype.__clone = function () {
const newNode = new Node();
const keys = Object.keys(this);
for (let i = 0, length = keys.length; i < length; i++) {
const key = keys[i];
if (
key !== 'leadingComments' &&
key !== 'trailingComments' &&
key !== 'innerComments'
) {
newNode[key] = this[key];
}
}
return newNode;
};
}
function clonePlaceholder(node) {
return cloneIdentifier(node);
}
function cloneIdentifier(node) {
const { type, start, end, loc, range, extra, name } = node;
const cloned = Object.create(NodePrototype);
cloned.type = type;
cloned.start = start;
cloned.end = end;
cloned.loc = loc;
cloned.range = range;
cloned.extra = extra;
cloned.name = name;
if (type === 'Placeholder') {
cloned.expectedNode = node.expectedNode;
}
return cloned;
}
function cloneStringLiteral(node) {
const { type, start, end, loc, range, extra } = node;
if (type === 'Placeholder') {
return clonePlaceholder(node);
}
const cloned = Object.create(NodePrototype);
cloned.type = type;
cloned.start = start;
cloned.end = end;
cloned.loc = loc;
cloned.range = range;
if (node.raw !== undefined) {
cloned.raw = node.raw;
} else {
cloned.extra = extra;
}
cloned.value = node.value;
return cloned;
}
class NodeUtils extends UtilParser {
startNode() {
return new Node(this, this.state.start, this.state.startLoc);
}
startNodeAt(pos, loc) {
return new Node(this, pos, loc);
}
startNodeAtNode(type) {
return this.startNodeAt(type.start, type.loc.start);
}
finishNode(node, type) {
return this.finishNodeAt(node, type, this.state.lastTokEndLoc);
}
finishNodeAt(node, type, endLoc) {
node.type = type;
node.end = endLoc.index;
node.loc.end = endLoc;
if (this.options.ranges) node.range[1] = endLoc.index;
if (this.options.attachComment) this.processComment(node);
return node;
}
resetStartLocation(node, start, startLoc) {
node.start = start;
node.loc.start = startLoc;
if (this.options.ranges) node.range[0] = start;
}
resetEndLocation(node, endLoc = this.state.lastTokEndLoc) {
node.end = endLoc.index;
node.loc.end = endLoc;
if (this.options.ranges) node.range[1] = endLoc.index;
}
resetStartLocationFromNode(node, locationNode) {
this.resetStartLocation(node, locationNode.start, locationNode.loc.start);
}
}
const reservedTypes = new Set([
'_',
'any',
'bool',
'boolean',
'empty',
'extends',
'false',
'interface',
'mixed',
'null',
'number',
'static',
'string',
'true',
'typeof',
'void',
]);
const FlowErrors = ParseErrorEnum`flow`((_) => ({
AmbiguousConditionalArrow: _(
'Ambiguous expression: wrap the arrow functions in parentheses to disambiguate.'
),
AmbiguousDeclareModuleKind: _(
'Found both `declare module.exports` and `declare export` in the same module. Modules can only have 1 since they are either an ES module or they are a CommonJS module.'
),
AssignReservedType: _(
({ reservedType }) => `Cannot overwrite reserved type ${reservedType}.`
),
DeclareClassElement: _(
'The `declare` modifier can only appear on class fields.'
),
DeclareClassFieldInitializer: _(
'Initializers are not allowed in fields with the `declare` modifier.'
),
DuplicateDeclareModuleExports: _(
'Duplicate `declare module.exports` statement.'
),
EnumBooleanMemberNotInitialized: _(
({ memberName, enumName }) =>
`Boolean enum members need to be initialized. Use either \`${memberName} = true,\` or \`${memberName} = false,\` in enum \`${enumName}\`.`
),
EnumDuplicateMemberName: _(
({ memberName, enumName }) =>
`Enum member names need to be unique, but the name \`${memberName}\` has already been used before in enum \`${enumName}\`.`
),
EnumInconsistentMemberValues: _(
({ enumName }) =>
`Enum \`${enumName}\` has inconsistent member initializers. Either use no initializers, or consistently use literals (either booleans, numbers, or strings) for all member initializers.`
),
EnumInvalidExplicitType: _(
({ invalidEnumType, enumName }) =>
`Enum type \`${invalidEnumType}\` is not valid. Use one of \`boolean\`, \`number\`, \`string\`, or \`symbol\` in enum \`${enumName}\`.`
),
EnumInvalidExplicitTypeUnknownSupplied: _(
({ enumName }) =>
`Supplied enum type is not valid. Use one of \`boolean\`, \`number\`, \`string\`, or \`symbol\` in enum \`${enumName}\`.`
),
EnumInvalidMemberInitializerPrimaryType: _(
({ enumName, memberName, explicitType }) =>
`Enum \`${enumName}\` has type \`${explicitType}\`, so the initializer of \`${memberName}\` needs to be a ${explicitType} literal.`
),
EnumInvalidMemberInitializerSymbolType: _(
({ enumName, memberName }) =>
`Symbol enum members cannot be initialized. Use \`${memberName},\` in enum \`${enumName}\`.`
),
EnumInvalidMemberInitializerUnknownType: _(
({ enumName, memberName }) =>
`The enum member initializer for \`${memberName}\` needs to be a literal (either a boolean, number, or string) in enum \`${enumName}\`.`
),
EnumInvalidMemberName: _(
({ enumName, memberName, suggestion }) =>
`Enum member names cannot start with lowercase 'a' through 'z'. Instead of using \`${memberName}\`, consider using \`${suggestion}\`, in enum \`${enumName}\`.`
),
EnumNumberMemberNotInitialized: _(
({ enumName, memberName }) =>
`Number enum members need to be initialized, e.g. \`${memberName} = 1\` in enum \`${enumName}\`.`
),
EnumStringMemberInconsistentlyInitailized: _(
({ enumName }) =>
`String enum members need to consistently either all use initializers, or use no initializers, in enum \`${enumName}\`.`
),
GetterMayNotHaveThisParam: _('A getter cannot have a `this` parameter.'),
ImportTypeShorthandOnlyInPureImport: _(
'The `type` and `typeof` keywords on named imports can only be used on regular `import` statements. It cannot be used with `import type` or `import typeof` statements.'
),
InexactInsideExact: _(
'Explicit inexact syntax cannot appear inside an explicit exact object type.'
),
InexactInsideNonObject: _(
'Explicit inexact syntax cannot appear in class or interface definitions.'
),
InexactVariance: _('Explicit inexact syntax cannot have variance.'),
InvalidNonTypeImportInDeclareModule: _(
'Imports within a `declare module` body must always be `import type` or `import typeof`.'
),
MissingTypeParamDefault: _(
'Type parameter declaration needs a default, since a preceding type parameter declaration has a default.'
),
NestedDeclareModule: _(
'`declare module` cannot be used inside another `declare module`.'
),
NestedFlowComment: _(
'Cannot have a flow comment inside another flow comment.'
),
PatternIsOptional: _(
'A binding pattern parameter cannot be optional in an implementation signature.',
{
reasonCode: 'OptionalBindingPattern',
}
),
SetterMayNotHaveThisParam: _('A setter cannot have a `this` parameter.'),
SpreadVariance: _('Spread properties cannot have variance.'),
ThisParamAnnotationRequired: _(
'A type annotation is required for the `this` parameter.'
),
ThisParamBannedInConstructor: _(
"Constructors cannot have a `this` parameter; constructors don't bind `this` like other functions."
),
ThisParamMayNotBeOptional: _('The `this` parameter cannot be optional.'),
ThisParamMustBeFirst: _(
'The `this` parameter must be the first function parameter.'
),
ThisParamNoDefault: _('The `this` parameter may not have a default value.'),
TypeBeforeInitializer: _(
'Type annotations must come before default assignments, e.g. instead of `age = 25: number` use `age: number = 25`.'
),
TypeCastInPattern: _(
'The type cast expression is expected to be wrapped with parenthesis.'
),
UnexpectedExplicitInexactInObject: _(
'Explicit inexact syntax must appear at the end of an inexact object.'
),
UnexpectedReservedType: _(
({ reservedType }) => `Unexpected reserved type ${reservedType}.`
),
UnexpectedReservedUnderscore: _(
'`_` is only allowed as a type argument to call or new.'
),
UnexpectedSpaceBetweenModuloChecks: _(
'Spaces between `%` and `checks` are not allowed here.'
),
UnexpectedSpreadType: _(
'Spread operator cannot appear in class or interface definitions.'
),
UnexpectedSubtractionOperand: _(
'Unexpected token, expected "number" or "bigint".'
),
UnexpectedTokenAfterTypeParameter: _(
'Expected an arrow function after this type parameter declaration.'
),
UnexpectedTypeParameterBeforeAsyncArrowFunction: _(
'Type parameters must come after the async keyword, e.g. instead of `<T> async () => {}`, use `async <T>() => {}`.'
),
UnsupportedDeclareExportKind: _(
({ unsupportedExportKind, suggestion }) =>
`\`declare export ${unsupportedExportKind}\` is not supported. Use \`${suggestion}\` instead.`
),
UnsupportedStatementInDeclareModule: _(
'Only declares and type imports are allowed inside declare module.'
),
UnterminatedFlowComment: _('Unterminated flow-comment.'),
}));
function isEsModuleType(bodyElement) {
return (
bodyElement.type === 'DeclareExportAllDeclaration' ||
(bodyElement.type === 'DeclareExportDeclaration' &&
(!bodyElement.declaration ||
(bodyElement.declaration.type !== 'TypeAlias' &&
bodyElement.declaration.type !== 'InterfaceDeclaration')))
);
}
function hasTypeImportKind(node) {
return node.importKind === 'type' || node.importKind === 'typeof';
}
function isMaybeDefaultImport(type) {
return tokenIsKeywordOrIdentifier(type) && type !== 97;
}
const exportSuggestions = {
const: 'declare export var',
let: 'declare export var',
type: 'export type',
interface: 'export interface',
};
function partition(list, test) {
const list1 = [];
const list2 = [];
for (let i = 0; i < list.length; i++) {
(test(list[i], i, list) ? list1 : list2).push(list[i]);
}
return [list1, list2];
}
const FLOW_PRAGMA_REGEX = /\*?\s*@((?:no)?flow)\b/;
var flow = (superClass) =>
class extends superClass {
constructor(...args) {
super(...args);
this.flowPragma = undefined;
}
getScopeHandler() {
return FlowScopeHandler;
}
shouldParseTypes() {
return this.getPluginOption('flow', 'all') || this.flowPragma === 'flow';
}
shouldParseEnums() {
return !!this.getPluginOption('flow', 'enums');
}
finishToken(type, val) {
if (type !== 129 && type !== 13 && type !== 28) {
if (this.flowPragma === undefined) {
this.flowPragma = null;
}
}
return super.finishToken(type, val);
}
addComment(comment) {
if (this.flowPragma === undefined) {
const matches = FLOW_PRAGMA_REGEX.exec(comment.value);
if (!matches);
else if (matches[1] === 'flow') {
this.flowPragma = 'flow';
} else if (matches[1] === 'noflow') {
this.flowPragma = 'noflow';
} else {
throw new Error('Unexpected flow pragma');
}
}
return super.addComment(comment);
}
flowParseTypeInitialiser(tok) {
const oldInType = this.state.inType;
this.state.inType = true;
this.expect(tok || 14);
const type = this.flowParseType();
this.state.inType = oldInType;
return type;
}
flowParsePredicate() {
const node = this.startNode();
const moduloLoc = this.state.startLoc;
this.next();
this.expectContextual(107);
if (this.state.lastTokStart > moduloLoc.index + 1) {
this.raise(FlowErrors.UnexpectedSpaceBetweenModuloChecks, {
at: moduloLoc,
});
}
if (this.eat(10)) {
node.value = this.parseExpression();
this.expect(11);
return this.finishNode(node, 'DeclaredPredicate');
} else {
return this.finishNode(node, 'InferredPredicate');
}
}
flowParseTypeAndPredicateInitialiser() {
const oldInType = this.state.inType;
this.state.inType = true;
this.expect(14);
let type = null;
let predicate = null;
if (this.match(54)) {
this.state.inType = oldInType;
predicate = this.flowParsePredicate();
} else {
type = this.flowParseType();
this.state.inType = oldInType;
if (this.match(54)) {
predicate = this.flowParsePredicate();
}
}
return [type, predicate];
}
flowParseDeclareClass(node) {
this.next();
this.flowParseInterfaceish(node, true);
return this.finishNode(node, 'DeclareClass');
}
flowParseDeclareFunction(node) {
this.next();
const id = (node.id = this.parseIdentifier());
const typeNode = this.startNode();
const typeContainer = this.startNode();
if (this.match(47)) {
typeNode.typeParameters = this.flowParseTypeParameterDeclaration();
} else {
typeNode.typeParameters = null;
}
this.expect(10);
const tmp = this.flowParseFunctionTypeParams();
typeNode.params = tmp.params;
typeNode.rest = tmp.rest;
typeNode.this = tmp._this;
this.expect(11);
[typeNode.returnType, node.predicate] =
this.flowParseTypeAndPredicateInitialiser();
typeContainer.typeAnnotation = this.finishNode(
typeNode,
'FunctionTypeAnnotation'
);
id.typeAnnotation = this.finishNode(typeContainer, 'TypeAnnotation');
this.resetEndLocation(id);
this.semicolon();
this.scope.declareName(
node.id.name,
BIND_FLOW_DECLARE_FN,
node.id.loc.start
);
return this.finishNode(node, 'DeclareFunction');
}
flowParseDeclare(node, insideModule) {
if (this.match(80)) {
return this.flowParseDeclareClass(node);
} else if (this.match(68)) {
return this.flowParseDeclareFunction(node);
} else if (this.match(74)) {
return this.flowParseDeclareVariable(node);
} else if (this.eatContextual(123)) {
if (this.match(16)) {
return this.flowParseDeclareModuleExports(node);
} else {
if (insideModule) {
this.raise(FlowErrors.NestedDeclareModule, {
at: this.state.lastTokStartLoc,
});
}
return this.flowParseDeclareModule(node);
}
} else if (this.isContextual(126)) {
return this.flowParseDeclareTypeAlias(node);
} else if (this.isContextual(127)) {
return this.flowParseDeclareOpaqueType(node);
} else if (this.isContextual(125)) {
return this.flowParseDeclareInterface(node);
} else if (this.match(82)) {
return this.flowParseDeclareExportDeclaration(node, insideModule);
} else {
throw this.unexpected();
}
}
flowParseDeclareVariable(node) {
this.next();
node.id = this.flowParseTypeAnnotatableIdentifier(true);
this.scope.declareName(node.id.name, BIND_VAR, node.id.loc.start);
this.semicolon();
return this.finishNode(node, 'DeclareVariable');
}
flowParseDeclareModule(node) {
this.scope.enter(SCOPE_OTHER);
if (this.match(129)) {
node.id = this.parseExprAtom();
} else {
node.id = this.parseIdentifier();
}
const bodyNode = (node.body = this.startNode());
const body = (bodyNode.body = []);
this.expect(5);
while (!this.match(8)) {
let bodyNode = this.startNode();
if (this.match(83)) {
this.next();
if (!this.isContextual(126) && !this.match(87)) {
this.raise(FlowErrors.InvalidNonTypeImportInDeclareModule, {
at: this.state.lastTokStartLoc,
});
}
this.parseImport(bodyNode);
} else {
this.expectContextual(
121,
FlowErrors.UnsupportedStatementInDeclareModule
);
bodyNode = this.flowParseDeclare(bodyNode, true);
}
body.push(bodyNode);
}
this.scope.exit();
this.expect(8);
this.finishNode(bodyNode, 'BlockStatement');
let kind = null;
let hasModuleExport = false;
body.forEach((bodyElement) => {
if (isEsModuleType(bodyElement)) {
if (kind === 'CommonJS') {
this.raise(FlowErrors.AmbiguousDeclareModuleKind, {
at: bodyElement,
});
}
kind = 'ES';
} else if (bodyElement.type === 'DeclareModuleExports') {
if (hasModuleExport) {
this.raise(FlowErrors.DuplicateDeclareModuleExports, {
at: bodyElement,
});
}
if (kind === 'ES') {
this.raise(FlowErrors.AmbiguousDeclareModuleKind, {
at: bodyElement,
});
}
kind = 'CommonJS';
hasModuleExport = true;
}
});
node.kind = kind || 'CommonJS';
return this.finishNode(node, 'DeclareModule');
}
flowParseDeclareExportDeclaration(node, insideModule) {
this.expect(82);
if (this.eat(65)) {
if (this.match(68) || this.match(80)) {
node.declaration = this.flowParseDeclare(this.startNode());
} else {
node.declaration = this.flowParseType();
this.semicolon();
}
node.default = true;
return this.finishNode(node, 'DeclareExportDeclaration');
} else {
if (
this.match(75) ||
this.isLet() ||
((this.isContextual(126) || this.isContextual(125)) && !insideModule)
) {
const label = this.state.value;
throw this.raise(FlowErrors.UnsupportedDeclareExportKind, {
at: this.state.startLoc,
unsupportedExportKind: label,
suggestion: exportSuggestions[label],
});
}
if (
this.match(74) ||
this.match(68) ||
this.match(80) ||
this.isContextual(127)
) {
node.declaration = this.flowParseDeclare(this.startNode());
node.default = false;
return this.finishNode(node, 'DeclareExportDeclaration');
} else if (
this.match(55) ||
this.match(5) ||
this.isContextual(125) ||
this.isContextual(126) ||
this.isContextual(127)
) {
node = this.parseExport(node);
if (node.type === 'ExportNamedDeclaration') {
node.type = 'ExportDeclaration';
node.default = false;
delete node.exportKind;
}
node.type = 'Declare' + node.type;
return node;
}
}
throw this.unexpected();
}
flowParseDeclareModuleExports(node) {
this.next();
this.expectContextual(108);
node.typeAnnotation = this.flowParseTypeAnnotation();
this.semicolon();
return this.finishNode(node, 'DeclareModuleExports');
}
flowParseDeclareTypeAlias(node) {
this.next();
this.flowParseTypeAlias(node);
node.type = 'DeclareTypeAlias';
return node;
}
flowParseDeclareOpaqueType(node) {
this.next();
this.flowParseOpaqueType(node, true);
node.type = 'DeclareOpaqueType';
return node;
}
flowParseDeclareInterface(node) {
this.next();
this.flowParseInterfaceish(node);
return this.finishNode(node, 'DeclareInterface');
}
flowParseInterfaceish(node, isClass = false) {
node.id = this.flowParseRestrictedIdentifier(!isClass, true);
this.scope.declareName(
node.id.name,
isClass ? BIND_FUNCTION : BIND_LEXICAL,
node.id.loc.start
);
if (this.match(47)) {
node.typeParameters = this.flowParseTypeParameterDeclaration();
} else {
node.typeParameters = null;
}
node.extends = [];
node.implements = [];
node.mixins = [];
if (this.eat(81)) {
do {
node.extends.push(this.flowParseInterfaceExtends());
} while (!isClass && this.eat(12));
}
if (this.isContextual(114)) {
this.next();
do {
node.mixins.push(this.flowParseInterfaceExtends());
} while (this.eat(12));
}
if (this.isContextual(110)) {
this.next();
do {
node.implements.push(this.flowParseInterfaceExtends());
} while (this.eat(12));
}
node.body = this.flowParseObjectType({
allowStatic: isClass,
allowExact: false,
allowSpread: false,
allowProto: isClass,
allowInexact: false,
});
}
flowParseInterfaceExtends() {
const node = this.startNode();
node.id = this.flowParseQualifiedTypeIdentifier();
if (this.match(47)) {
node.typeParameters = this.flowParseTypeParameterInstantiation();
} else {
node.typeParameters = null;
}
return this.finishNode(node, 'InterfaceExtends');
}
flowParseInterface(node) {
this.flowParseInterfaceish(node);
return this.finishNode(node, 'InterfaceDeclaration');
}
checkNotUnderscore(word) {
if (word === '_') {
this.raise(FlowErrors.UnexpectedReservedUnderscore, {
at: this.state.startLoc,
});
}
}
checkReservedType(word, startLoc, declaration) {
if (!reservedTypes.has(word)) return;
this.raise(
declaration ?
FlowErrors.AssignReservedType
: FlowErrors.UnexpectedReservedType,
{
at: startLoc,
reservedType: word,
}
);
}
flowParseRestrictedIdentifier(liberal, declaration) {
this.checkReservedType(
this.state.value,
this.state.startLoc,
declaration
);
return this.parseIdentifier(liberal);
}
flowParseTypeAlias(node) {
node.id = this.flowParseRestrictedIdentifier(false, true);
this.scope.declareName(node.id.name, BIND_LEXICAL, node.id.loc.start);
if (this.match(47)) {
node.typeParameters = this.flowParseTypeParameterDeclaration();
} else {
node.typeParameters = null;
}
node.right = this.flowParseTypeInitialiser(29);
this.semicolon();
return this.finishNode(node, 'TypeAlias');
}
flowParseOpaqueType(node, declare) {
this.expectContextual(126);
node.id = this.flowParseRestrictedIdentifier(true, true);
this.scope.declareName(node.id.name, BIND_LEXICAL, node.id.loc.start);
if (this.match(47)) {
node.typeParameters = this.flowParseTypeParameterDeclaration();
} else {
node.typeParameters = null;
}
node.supertype = null;
if (this.match(14)) {
node.supertype = this.flowParseTypeInitialiser(14);
}
node.impltype = null;
if (!declare) {
node.impltype = this.flowParseTypeInitialiser(29);
}
this.semicolon();
return this.finishNode(node, 'OpaqueType');
}
flowParseTypeParameter(requireDefault = false) {
const nodeStartLoc = this.state.startLoc;
const node = this.startNode();
const variance = this.flowParseVariance();
const ident = this.flowParseTypeAnnotatableIdentifier();
node.name = ident.name;
node.variance = variance;
node.bound = ident.typeAnnotation;
if (this.match(29)) {
this.eat(29);
node.default = this.flowParseType();
} else {
if (requireDefault) {
this.raise(FlowErrors.MissingTypeParamDefault, {
at: nodeStartLoc,
});
}
}
return this.finishNode(node, 'TypeParameter');
}
flowParseTypeParameterDeclaration() {
const oldInType = this.state.inType;
const node = this.startNode();
node.params = [];
this.state.inType = true;
if (this.match(47) || this.match(138)) {
this.next();
} else {
this.unexpected();
}
let defaultRequired = false;
do {
const typeParameter = this.flowParseTypeParameter(defaultRequired);
node.params.push(typeParameter);
if (typeParameter.default) {
defaultRequired = true;
}
if (!this.match(48)) {
this.expect(12);
}
} while (!this.match(48));
this.expect(48);
this.state.inType = oldInType;
return this.finishNode(node, 'TypeParameterDeclaration');
}
flowParseTypeParameterInstantiation() {
const node = this.startNode();
const oldInType = this.state.inType;
node.params = [];
this.state.inType = true;
this.expect(47);
const oldNoAnonFunctionType = this.state.noAnonFunctionType;
this.state.noAnonFunctionType = false;
while (!this.match(48)) {
node.params.push(this.flowParseType());
if (!this.match(48)) {
this.expect(12);
}
}
this.state.noAnonFunctionType = oldNoAnonFunctionType;
this.expect(48);
this.state.inType = oldInType;
return this.finishNode(node, 'TypeParameterInstantiation');
}
flowParseTypeParameterInstantiationCallOrNew() {
const node = this.startNode();
const oldInType = this.state.inType;
node.params = [];
this.state.inType = true;
this.expect(47);
while (!this.match(48)) {
node.params.push(this.flowParseTypeOrImplicitInstantiation());
if (!this.match(48)) {
this.expect(12);
}
}
this.expect(48);
this.state.inType = oldInType;
return this.finishNode(node, 'TypeParameterInstantiation');
}
flowParseInterfaceType() {
const node = this.startNode();
this.expectContextual(125);
node.extends = [];
if (this.eat(81)) {
do {
node.extends.push(this.flowParseInterfaceExtends());
} while (this.eat(12));
}
node.body = this.flowParseObjectType({
allowStatic: false,
allowExact: false,
allowSpread: false,
allowProto: false,
allowInexact: false,
});
return this.finishNode(node, 'InterfaceTypeAnnotation');
}
flowParseObjectPropertyKey() {
return this.match(130) || this.match(129) ?
this.parseExprAtom()
: this.parseIdentifier(true);
}
flowParseObjectTypeIndexer(node, isStatic, variance) {
node.static = isStatic;
if (this.lookahead().type === 14) {
node.id = this.flowParseObjectPropertyKey();
node.key = this.flowParseTypeInitialiser();
} else {
node.id = null;
node.key = this.flowParseType();
}
this.expect(3);
node.value = this.flowParseTypeInitialiser();
node.variance = variance;
return this.finishNode(node, 'ObjectTypeIndexer');
}
flowParseObjectTypeInternalSlot(node, isStatic) {
node.static = isStatic;
node.id = this.flowParseObjectPropertyKey();
this.expect(3);
this.expect(3);
if (this.match(47) || this.match(10)) {
node.method = true;
node.optional = false;
node.value = this.flowParseObjectTypeMethodish(
this.startNodeAt(node.start, node.loc.start)
);
} else {
node.method = false;
if (this.eat(17)) {
node.optional = true;
}
node.value = this.flowParseTypeInitialiser();
}
return this.finishNode(node, 'ObjectTypeInternalSlot');
}
flowParseObjectTypeMethodish(node) {
node.params = [];
node.rest = null;
node.typeParameters = null;
node.this = null;
if (this.match(47)) {
node.typeParameters = this.flowParseTypeParameterDeclaration();
}
this.expect(10);
if (this.match(78)) {
node.this = this.flowParseFunctionTypeParam(true);
node.this.name = null;
if (!this.match(11)) {
this.expect(12);
}
}
while (!this.match(11) && !this.match(21)) {
node.params.push(this.flowParseFunctionTypeParam(false));
if (!this.match(11)) {
this.expect(12);
}
}
if (this.eat(21)) {
node.rest = this.flowParseFunctionTypeParam(false);
}
this.expect(11);
node.returnType = this.flowParseTypeInitialiser();
return this.finishNode(node, 'FunctionTypeAnnotation');
}
flowParseObjectTypeCallProperty(node, isStatic) {
const valueNode = this.startNode();
node.static = isStatic;
node.value = this.flowParseObjectTypeMethodish(valueNode);
return this.finishNode(node, 'ObjectTypeCallProperty');
}
flowParseObjectType({
allowStatic,
allowExact,
allowSpread,
allowProto,
allowInexact,
}) {
const oldInType = this.state.inType;
this.state.inType = true;
const nodeStart = this.startNode();
nodeStart.callProperties = [];
nodeStart.properties = [];
nodeStart.indexers = [];
nodeStart.internalSlots = [];
let endDelim;
let exact;
let inexact = false;
if (allowExact && this.match(6)) {
this.expect(6);
endDelim = 9;
exact = true;
} else {
this.expect(5);
endDelim = 8;
exact = false;
}
nodeStart.exact = exact;
while (!this.match(endDelim)) {
let isStatic = false;
let protoStartLoc = null;
let inexactStartLoc = null;
const node = this.startNode();
if (allowProto && this.isContextual(115)) {
const lookahead = this.lookahead();
if (lookahead.type !== 14 && lookahead.type !== 17) {
this.next();
protoStartLoc = this.state.startLoc;
allowStatic = false;
}
}
if (allowStatic && this.isContextual(104)) {
const lookahead = this.lookahead();
if (lookahead.type !== 14 && lookahead.type !== 17) {
this.next();
isStatic = true;
}
}
const variance = this.flowParseVariance();
if (this.eat(0)) {
if (protoStartLoc != null) {
this.unexpected(protoStartLoc);
}
if (this.eat(0)) {
if (variance) {
this.unexpected(variance.loc.start);
}
nodeStart.internalSlots.push(
this.flowParseObjectTypeInternalSlot(node, isStatic)
);
} else {
nodeStart.indexers.push(
this.flowParseObjectTypeIndexer(node, isStatic, variance)
);
}
} else if (this.match(10) || this.match(47)) {
if (protoStartLoc != null) {
this.unexpected(protoStartLoc);
}
if (variance) {
this.unexpected(variance.loc.start);
}
nodeStart.callProperties.push(
this.flowParseObjectTypeCallProperty(node, isStatic)
);
} else {
let kind = 'init';
if (this.isContextual(98) || this.isContextual(103)) {
const lookahead = this.lookahead();
if (tokenIsLiteralPropertyName(lookahead.type)) {
kind = this.state.value;
this.next();
}
}
const propOrInexact = this.flowParseObjectTypeProperty(
node,
isStatic,
protoStartLoc,
variance,
kind,
allowSpread,
allowInexact != null ? allowInexact : !exact
);
if (propOrInexact === null) {
inexact = true;
inexactStartLoc = this.state.lastTokStartLoc;
} else {
nodeStart.properties.push(propOrInexact);
}
}
this.flowObjectTypeSemicolon();
if (inexactStartLoc && !this.match(8) && !this.match(9)) {
this.raise(FlowErrors.UnexpectedExplicitInexactInObject, {
at: inexactStartLoc,
});
}
}
this.expect(endDelim);
if (allowSpread) {
nodeStart.inexact = inexact;
}
const out = this.finishNode(nodeStart, 'ObjectTypeAnnotation');
this.state.inType = oldInType;
return out;
}
flowParseObjectTypeProperty(
node,
isStatic,
protoStartLoc,
variance,
kind,
allowSpread,
allowInexact
) {
if (this.eat(21)) {
const isInexactToken =
this.match(12) || this.match(13) || this.match(8) || this.match(9);
if (isInexactToken) {
if (!allowSpread) {
this.raise(FlowErrors.InexactInsideNonObject, {
at: this.state.lastTokStartLoc,
});
} else if (!allowInexact) {
this.raise(FlowErrors.InexactInsideExact, {
at: this.state.lastTokStartLoc,
});
}
if (variance) {
this.raise(FlowErrors.InexactVariance, {
at: variance,
});
}
return null;
}
if (!allowSpread) {
this.raise(FlowErrors.UnexpectedSpreadType, {
at: this.state.lastTokStartLoc,
});
}
if (protoStartLoc != null) {
this.unexpected(protoStartLoc);
}
if (variance) {
this.raise(FlowErrors.SpreadVariance, {
at: variance,
});
}
node.argument = this.flowParseType();
return this.finishNode(node, 'ObjectTypeSpreadProperty');
} else {
node.key = this.flowParseObjectPropertyKey();
node.static = isStatic;
node.proto = protoStartLoc != null;
node.kind = kind;
let optional = false;
if (this.match(47) || this.match(10)) {
node.method = true;
if (protoStartLoc != null) {
this.unexpected(protoStartLoc);
}
if (variance) {
this.unexpected(variance.loc.start);
}
node.value = this.flowParseObjectTypeMethodish(
this.startNodeAt(node.start, node.loc.start)
);
if (kind === 'get' || kind === 'set') {
this.flowCheckGetterSetterParams(node);
}
if (
!allowSpread &&
node.key.name === 'constructor' &&
node.value.this
) {
this.raise(FlowErrors.ThisParamBannedInConstructor, {
at: node.value.this,
});
}
} else {
if (kind !== 'init') this.unexpected();
node.method = false;
if (this.eat(17)) {
optional = true;
}
node.value = this.flowParseTypeInitialiser();
node.variance = variance;
}
node.optional = optional;
return this.finishNode(node, 'ObjectTypeProperty');
}
}
flowCheckGetterSetterParams(property) {
const paramCount = property.kind === 'get' ? 0 : 1;
const length =
property.value.params.length + (property.value.rest ? 1 : 0);
if (property.value.this) {
this.raise(
property.kind === 'get' ?
FlowErrors.GetterMayNotHaveThisParam
: FlowErrors.SetterMayNotHaveThisParam,
{
at: property.value.this,
}
);
}
if (length !== paramCount) {
this.raise(
property.kind === 'get' ?
Errors.BadGetterArity
: Errors.BadSetterArity,
{
at: property,
}
);
}
if (property.kind === 'set' && property.value.rest) {
this.raise(Errors.BadSetterRestParameter, {
at: property,
});
}
}
flowObjectTypeSemicolon() {
if (!this.eat(13) && !this.eat(12) && !this.match(8) && !this.match(9)) {
this.unexpected();
}
}
flowParseQualifiedTypeIdentifier(startPos, startLoc, id) {
startPos = startPos || this.state.start;
startLoc = startLoc || this.state.startLoc;
let node = id || this.flowParseRestrictedIdentifier(true);
while (this.eat(16)) {
const node2 = this.startNodeAt(startPos, startLoc);
node2.qualification = node;
node2.id = this.flowParseRestrictedIdentifier(true);
node = this.finishNode(node2, 'QualifiedTypeIdentifier');
}
return node;
}
flowParseGenericType(startPos, startLoc, id) {
const node = this.startNodeAt(startPos, startLoc);
node.typeParameters = null;
node.id = this.flowParseQualifiedTypeIdentifier(startPos, startLoc, id);
if (this.match(47)) {
node.typeParameters = this.flowParseTypeParameterInstantiation();
}
return this.finishNode(node, 'GenericTypeAnnotation');
}
flowParseTypeofType() {
const node = this.startNode();
this.expect(87);
node.argument = this.flowParsePrimaryType();
return this.finishNode(node, 'TypeofTypeAnnotation');
}
flowParseTupleType() {
const node = this.startNode();
node.types = [];
this.expect(0);
while (this.state.pos < this.length && !this.match(3)) {
node.types.push(this.flowParseType());
if (this.match(3)) break;
this.expect(12);
}
this.expect(3);
return this.finishNode(node, 'TupleTypeAnnotation');
}
flowParseFunctionTypeParam(first) {
let name = null;
let optional = false;
let typeAnnotation = null;
const node = this.startNode();
const lh = this.lookahead();
const isThis = this.state.type === 78;
if (lh.type === 14 || lh.type === 17) {
if (isThis && !first) {
this.raise(FlowErrors.ThisParamMustBeFirst, {
at: node,
});
}
name = this.parseIdentifier(isThis);
if (this.eat(17)) {
optional = true;
if (isThis) {
this.raise(FlowErrors.ThisParamMayNotBeOptional, {
at: node,
});
}
}
typeAnnotation = this.flowParseTypeInitialiser();
} else {
typeAnnotation = this.flowParseType();
}
node.name = name;
node.optional = optional;
node.typeAnnotation = typeAnnotation;
return this.finishNode(node, 'FunctionTypeParam');
}
reinterpretTypeAsFunctionTypeParam(type) {
const node = this.startNodeAt(type.start, type.loc.start);
node.name = null;
node.optional = false;
node.typeAnnotation = type;
return this.finishNode(node, 'FunctionTypeParam');
}
flowParseFunctionTypeParams(params = []) {
let rest = null;
let _this = null;
if (this.match(78)) {
_this = this.flowParseFunctionTypeParam(true);
_this.name = null;
if (!this.match(11)) {
this.expect(12);
}
}
while (!this.match(11) && !this.match(21)) {
params.push(this.flowParseFunctionTypeParam(false));
if (!this.match(11)) {
this.expect(12);
}
}
if (this.eat(21)) {
rest = this.flowParseFunctionTypeParam(false);
}
return {
params,
rest,
_this,
};
}
flowIdentToTypeAnnotation(startPos, startLoc, node, id) {
switch (id.name) {
case 'any':
return this.finishNode(node, 'AnyTypeAnnotation');
case 'bool':
case 'boolean':
return this.finishNode(node, 'BooleanTypeAnnotation');
case 'mixed':
return this.finishNode(node, 'MixedTypeAnnotation');
case 'empty':
return this.finishNode(node, 'EmptyTypeAnnotation');
case 'number':
return this.finishNode(node, 'NumberTypeAnnotation');
case 'string':
return this.finishNode(node, 'StringTypeAnnotation');
case 'symbol':
return this.finishNode(node, 'SymbolTypeAnnotation');
default:
this.checkNotUnderscore(id.name);
return this.flowParseGenericType(startPos, startLoc, id);
}
}
flowParsePrimaryType() {
const startPos = this.state.start;
const startLoc = this.state.startLoc;
const node = this.startNode();
let tmp;
let type;
let isGroupedType = false;
const oldNoAnonFunctionType = this.state.noAnonFunctionType;
switch (this.state.type) {
case 5:
return this.flowParseObjectType({
allowStatic: false,
allowExact: false,
allowSpread: true,
allowProto: false,
allowInexact: true,
});
case 6:
return this.flowParseObjectType({
allowStatic: false,
allowExact: true,
allowSpread: true,
allowProto: false,
allowInexact: false,
});
case 0:
this.state.noAnonFunctionType = false;
type = this.flowParseTupleType();
this.state.noAnonFunctionType = oldNoAnonFunctionType;
return type;
case 47:
node.typeParameters = this.flowParseTypeParameterDeclaration();
this.expect(10);
tmp = this.flowParseFunctionTypeParams();
node.params = tmp.params;
node.rest = tmp.rest;
node.this = tmp._this;
this.expect(11);
this.expect(19);
node.returnType = this.flowParseType();
return this.finishNode(node, 'FunctionTypeAnnotation');
case 10:
this.next();
if (!this.match(11) && !this.match(21)) {
if (tokenIsIdentifier(this.state.type) || this.match(78)) {
const token = this.lookahead().type;
isGroupedType = token !== 17 && token !== 14;
} else {
isGroupedType = true;
}
}
if (isGroupedType) {
this.state.noAnonFunctionType = false;
type = this.flowParseType();
this.state.noAnonFunctionType = oldNoAnonFunctionType;
if (
this.state.noAnonFunctionType ||
!(
this.match(12) ||
(this.match(11) && this.lookahead().type === 19)
)
) {
this.expect(11);
return type;
} else {
this.eat(12);
}
}
if (type) {
tmp = this.flowParseFunctionTypeParams([
this.reinterpretTypeAsFunctionTypeParam(type),
]);
} else {
tmp = this.flowParseFunctionTypeParams();
}
node.params = tmp.params;
node.rest = tmp.rest;
node.this = tmp._this;
this.expect(11);
this.expect(19);
node.returnType = this.flowParseType();
node.typeParameters = null;
return this.finishNode(node, 'FunctionTypeAnnotation');
case 129:
return this.parseLiteral(
this.state.value,
'StringLiteralTypeAnnotation'
);
case 85:
case 86:
node.value = this.match(85);
this.next();
return this.finishNode(node, 'BooleanLiteralTypeAnnotation');
case 53:
if (this.state.value === '-') {
this.next();
if (this.match(130)) {
return this.parseLiteralAtNode(
-this.state.value,
'NumberLiteralTypeAnnotation',
node
);
}
if (this.match(131)) {
return this.parseLiteralAtNode(
-this.state.value,
'BigIntLiteralTypeAnnotation',
node
);
}
throw this.raise(FlowErrors.UnexpectedSubtractionOperand, {
at: this.state.startLoc,
});
}
throw this.unexpected();
case 130:
return this.parseLiteral(
this.state.value,
'NumberLiteralTypeAnnotation'
);
case 131:
return this.parseLiteral(
this.state.value,
'BigIntLiteralTypeAnnotation'
);
case 88:
this.next();
return this.finishNode(node, 'VoidTypeAnnotation');
case 84:
this.next();
return this.finishNode(node, 'NullLiteralTypeAnnotation');
case 78:
this.next();
return this.finishNode(node, 'ThisTypeAnnotation');
case 55:
this.next();
return this.finishNode(node, 'ExistsTypeAnnotation');
case 87:
return this.flowParseTypeofType();
default:
if (tokenIsKeyword(this.state.type)) {
const label = tokenLabelName(this.state.type);
this.next();
return super.createIdentifier(node, label);
} else if (tokenIsIdentifier(this.state.type)) {
if (this.isContextual(125)) {
return this.flowParseInterfaceType();
}
return this.flowIdentToTypeAnnotation(
startPos,
startLoc,
node,
this.parseIdentifier()
);
}
}
throw this.unexpected();
}
flowParsePostfixType() {
const startPos = this.state.start;
const startLoc = this.state.startLoc;
let type = this.flowParsePrimaryType();
let seenOptionalIndexedAccess = false;
while ((this.match(0) || this.match(18)) && !this.canInsertSemicolon()) {
const node = this.startNodeAt(startPos, startLoc);
const optional = this.eat(18);
seenOptionalIndexedAccess = seenOptionalIndexedAccess || optional;
this.expect(0);
if (!optional && this.match(3)) {
node.elementType = type;
this.next();
type = this.finishNode(node, 'ArrayTypeAnnotation');
} else {
node.objectType = type;
node.indexType = this.flowParseType();
this.expect(3);
if (seenOptionalIndexedAccess) {
node.optional = optional;
type = this.finishNode(node, 'OptionalIndexedAccessType');
} else {
type = this.finishNode(node, 'IndexedAccessType');
}
}
}
return type;
}
flowParsePrefixType() {
const node = this.startNode();
if (this.eat(17)) {
node.typeAnnotation = this.flowParsePrefixType();
return this.finishNode(node, 'NullableTypeAnnotation');
} else {
return this.flowParsePostfixType();
}
}
flowParseAnonFunctionWithoutParens() {
const param = this.flowParsePrefixType();
if (!this.state.noAnonFunctionType && this.eat(19)) {
const node = this.startNodeAt(param.start, param.loc.start);
node.params = [this.reinterpretTypeAsFunctionTypeParam(param)];
node.rest = null;
node.this = null;
node.returnType = this.flowParseType();
node.typeParameters = null;
return this.finishNode(node, 'FunctionTypeAnnotation');
}
return param;
}
flowParseIntersectionType() {
const node = this.startNode();
this.eat(45);
const type = this.flowParseAnonFunctionWithoutParens();
node.types = [type];
while (this.eat(45)) {
node.types.push(this.flowParseAnonFunctionWithoutParens());
}
return node.types.length === 1 ?
type
: this.finishNode(node, 'IntersectionTypeAnnotation');
}
flowParseUnionType() {
const node = this.startNode();
this.eat(43);
const type = this.flowParseIntersectionType();
node.types = [type];
while (this.eat(43)) {
node.types.push(this.flowParseIntersectionType());
}
return node.types.length === 1 ?
type
: this.finishNode(node, 'UnionTypeAnnotation');
}
flowParseType() {
const oldInType = this.state.inType;
this.state.inType = true;
const type = this.flowParseUnionType();
this.state.inType = oldInType;
return type;
}
flowParseTypeOrImplicitInstantiation() {
if (this.state.type === 128 && this.state.value === '_') {
const startPos = this.state.start;
const startLoc = this.state.startLoc;
const node = this.parseIdentifier();
return this.flowParseGenericType(startPos, startLoc, node);
} else {
return this.flowParseType();
}
}
flowParseTypeAnnotation() {
const node = this.startNode();
node.typeAnnotation = this.flowParseTypeInitialiser();
return this.finishNode(node, 'TypeAnnotation');
}
flowParseTypeAnnotatableIdentifier(allowPrimitiveOverride) {
const ident =
allowPrimitiveOverride ?
this.parseIdentifier()
: this.flowParseRestrictedIdentifier();
if (this.match(14)) {
ident.typeAnnotation = this.flowParseTypeAnnotation();
this.resetEndLocation(ident);
}
return ident;
}
typeCastToParameter(node) {
node.expression.typeAnnotation = node.typeAnnotation;
this.resetEndLocation(node.expression, node.typeAnnotation.loc.end);
return node.expression;
}
flowParseVariance() {
let variance = null;
if (this.match(53)) {
variance = this.startNode();
if (this.state.value === '+') {
variance.kind = 'plus';
} else {
variance.kind = 'minus';
}
this.next();
this.finishNode(variance, 'Variance');
}
return variance;
}
parseFunctionBody(node, allowExpressionBody, isMethod = false) {
if (allowExpressionBody) {
return this.forwardNoArrowParamsConversionAt(node, () =>
super.parseFunctionBody(node, true, isMethod)
);
}
return super.parseFunctionBody(node, false, isMethod);
}
parseFunctionBodyAndFinish(node, type, isMethod = false) {
if (this.match(14)) {
const typeNode = this.startNode();
[typeNode.typeAnnotation, node.predicate] =
this.flowParseTypeAndPredicateInitialiser();
node.returnType =
typeNode.typeAnnotation ?
this.finishNode(typeNode, 'TypeAnnotation')
: null;
}
super.parseFunctionBodyAndFinish(node, type, isMethod);
}
parseStatement(context, topLevel) {
if (this.state.strict && this.isContextual(125)) {
const lookahead = this.lookahead();
if (tokenIsKeywordOrIdentifier(lookahead.type)) {
const node = this.startNode();
this.next();
return this.flowParseInterface(node);
}
} else if (this.shouldParseEnums() && this.isContextual(122)) {
const node = this.startNode();
this.next();
return this.flowParseEnumDeclaration(node);
}
const stmt = super.parseStatement(context, topLevel);
if (this.flowPragma === undefined && !this.isValidDirective(stmt)) {
this.flowPragma = null;
}
return stmt;
}
parseExpressionStatement(node, expr) {
if (expr.type === 'Identifier') {
if (expr.name === 'declare') {
if (
this.match(80) ||
tokenIsIdentifier(this.state.type) ||
this.match(68) ||
this.match(74) ||
this.match(82)
) {
return this.flowParseDeclare(node);
}
} else if (tokenIsIdentifier(this.state.type)) {
if (expr.name === 'interface') {
return this.flowParseInterface(node);
} else if (expr.name === 'type') {
return this.flowParseTypeAlias(node);
} else if (expr.name === 'opaque') {
return this.flowParseOpaqueType(node, false);
}
}
}
return super.parseExpressionStatement(node, expr);
}
shouldParseExportDeclaration() {
const { type } = this.state;
if (
tokenIsFlowInterfaceOrTypeOrOpaque(type) ||
(this.shouldParseEnums() && type === 122)
) {
return !this.state.containsEsc;
}
return super.shouldParseExportDeclaration();
}
isExportDefaultSpecifier() {
const { type } = this.state;
if (
tokenIsFlowInterfaceOrTypeOrOpaque(type) ||
(this.shouldParseEnums() && type === 122)
) {
return this.state.containsEsc;
}
return super.isExportDefaultSpecifier();
}
parseExportDefaultExpression() {
if (this.shouldParseEnums() && this.isContextual(122)) {
const node = this.startNode();
this.next();
return this.flowParseEnumDeclaration(node);
}
return super.parseExportDefaultExpression();
}
parseConditional(expr, startPos, startLoc, refExpressionErrors) {
if (!this.match(17)) return expr;
if (this.state.maybeInArrowParameters) {
const nextCh = this.lookaheadCharCode();
if (nextCh === 44 || nextCh === 61 || nextCh === 58 || nextCh === 41) {
this.setOptionalParametersError(refExpressionErrors);
return expr;
}
}
this.expect(17);
const state = this.state.clone();
const originalNoArrowAt = this.state.noArrowAt;
const node = this.startNodeAt(startPos, startLoc);
let { consequent, failed } = this.tryParseConditionalConsequent();
let [valid, invalid] = this.getArrowLikeExpressions(consequent);
if (failed || invalid.length > 0) {
const noArrowAt = [...originalNoArrowAt];
if (invalid.length > 0) {
this.state = state;
this.state.noArrowAt = noArrowAt;
for (let i = 0; i < invalid.length; i++) {
noArrowAt.push(invalid[i].start);
}
({ consequent, failed } = this.tryParseConditionalConsequent());
[valid, invalid] = this.getArrowLikeExpressions(consequent);
}
if (failed && valid.length > 1) {
this.raise(FlowErrors.AmbiguousConditionalArrow, {
at: state.startLoc,
});
}
if (failed && valid.length === 1) {
this.state = state;
noArrowAt.push(valid[0].start);
this.state.noArrowAt = noArrowAt;
({ consequent, failed } = this.tryParseConditionalConsequent());
}
}
this.getArrowLikeExpressions(consequent, true);
this.state.noArrowAt = originalNoArrowAt;
this.expect(14);
node.test = expr;
node.consequent = consequent;
node.alternate = this.forwardNoArrowParamsConversionAt(node, () =>
this.parseMaybeAssign(undefined, undefined)
);
return this.finishNode(node, 'ConditionalExpression');
}
tryParseConditionalConsequent() {
this.state.noArrowParamsConversionAt.push(this.state.start);
const consequent = this.parseMaybeAssignAllowIn();
const failed = !this.match(14);
this.state.noArrowParamsConversionAt.pop();
return {
consequent,
failed,
};
}
getArrowLikeExpressions(node, disallowInvalid) {
const stack = [node];
const arrows = [];
while (stack.length !== 0) {
const node = stack.pop();
if (node.type === 'ArrowFunctionExpression') {
if (node.typeParameters || !node.returnType) {
this.finishArrowValidation(node);
} else {
arrows.push(node);
}
stack.push(node.body);
} else if (node.type === 'ConditionalExpression') {
stack.push(node.consequent);
stack.push(node.alternate);
}
}
if (disallowInvalid) {
arrows.forEach((node) => this.finishArrowValidation(node));
return [arrows, []];
}
return partition(arrows, (node) =>
node.params.every((param) => this.isAssignable(param, true))
);
}
finishArrowValidation(node) {
var _node$extra;
this.toAssignableList(
node.params,
(_node$extra = node.extra) == null ?
void 0
: _node$extra.trailingCommaLoc,
false
);
this.scope.enter(SCOPE_FUNCTION | SCOPE_ARROW);
super.checkParams(node, false, true);
this.scope.exit();
}
forwardNoArrowParamsConversionAt(node, parse) {
let result;
if (this.state.noArrowParamsConversionAt.indexOf(node.start) !== -1) {
this.state.noArrowParamsConversionAt.push(this.state.start);
result = parse();
this.state.noArrowParamsConversionAt.pop();
} else {
result = parse();
}
return result;
}
parseParenItem(node, startPos, startLoc) {
node = super.parseParenItem(node, startPos, startLoc);
if (this.eat(17)) {
node.optional = true;
this.resetEndLocation(node);
}
if (this.match(14)) {
const typeCastNode = this.startNodeAt(startPos, startLoc);
typeCastNode.expression = node;
typeCastNode.typeAnnotation = this.flowParseTypeAnnotation();
return this.finishNode(typeCastNode, 'TypeCastExpression');
}
return node;
}
assertModuleNodeAllowed(node) {
if (
(node.type === 'ImportDeclaration' &&
(node.importKind === 'type' || node.importKind === 'typeof')) ||
(node.type === 'ExportNamedDeclaration' &&
node.exportKind === 'type') ||
(node.type === 'ExportAllDeclaration' && node.exportKind === 'type')
) {
return;
}
super.assertModuleNodeAllowed(node);
}
parseExport(node) {
const decl = super.parseExport(node);
if (
decl.type === 'ExportNamedDeclaration' ||
decl.type === 'ExportAllDeclaration'
) {
decl.exportKind = decl.exportKind || 'value';
}
return decl;
}
parseExportDeclaration(node) {
if (this.isContextual(126)) {
node.exportKind = 'type';
const declarationNode = this.startNode();
this.next();
if (this.match(5)) {
node.specifiers = this.parseExportSpecifiers(true);
this.parseExportFrom(node);
return null;
} else {
return this.flowParseTypeAlias(declarationNode);
}
} else if (this.isContextual(127)) {
node.exportKind = 'type';
const declarationNode = this.startNode();
this.next();
return this.flowParseOpaqueType(declarationNode, false);
} else if (this.isContextual(125)) {
node.exportKind = 'type';
const declarationNode = this.startNode();
this.next();
return this.flowParseInterface(declarationNode);
} else if (this.shouldParseEnums() && this.isContextual(122)) {
node.exportKind = 'value';
const declarationNode = this.startNode();
this.next();
return this.flowParseEnumDeclaration(declarationNode);
} else {
return super.parseExportDeclaration(node);
}
}
eatExportStar(node) {
if (super.eatExportStar(...arguments)) return true;
if (this.isContextual(126) && this.lookahead().type === 55) {
node.exportKind = 'type';
this.next();
this.next();
return true;
}
return false;
}
maybeParseExportNamespaceSpecifier(node) {
const { startLoc } = this.state;
const hasNamespace = super.maybeParseExportNamespaceSpecifier(node);
if (hasNamespace && node.exportKind === 'type') {
this.unexpected(startLoc);
}
return hasNamespace;
}
parseClassId(node, isStatement, optionalId) {
super.parseClassId(node, isStatement, optionalId);
if (this.match(47)) {
node.typeParameters = this.flowParseTypeParameterDeclaration();
}
}
parseClassMember(classBody, member, state) {
const { startLoc } = this.state;
if (this.isContextual(121)) {
if (this.parseClassMemberFromModifier(classBody, member)) {
return;
}
member.declare = true;
}
super.parseClassMember(classBody, member, state);
if (member.declare) {
if (
member.type !== 'ClassProperty' &&
member.type !== 'ClassPrivateProperty' &&
member.type !== 'PropertyDefinition'
) {
this.raise(FlowErrors.DeclareClassElement, {
at: startLoc,
});
} else if (member.value) {
this.raise(FlowErrors.DeclareClassFieldInitializer, {
at: member.value,
});
}
}
}
isIterator(word) {
return word === 'iterator' || word === 'asyncIterator';
}
readIterator() {
const word = super.readWord1();
const fullWord = '@@' + word;
if (!this.isIterator(word) || !this.state.inType) {
this.raise(Errors.InvalidIdentifier, {
at: this.state.curPosition(),
identifierName: fullWord,
});
}
this.finishToken(128, fullWord);
}
getTokenFromCode(code) {
const next = this.input.charCodeAt(this.state.pos + 1);
if (code === 123 && next === 124) {
return this.finishOp(6, 2);
} else if (this.state.inType && (code === 62 || code === 60)) {
return this.finishOp(code === 62 ? 48 : 47, 1);
} else if (this.state.inType && code === 63) {
if (next === 46) {
return this.finishOp(18, 2);
}
return this.finishOp(17, 1);
} else if (
isIteratorStart(code, next, this.input.charCodeAt(this.state.pos + 2))
) {
this.state.pos += 2;
return this.readIterator();
} else {
return super.getTokenFromCode(code);
}
}
isAssignable(node, isBinding) {
if (node.type === 'TypeCastExpression') {
return this.isAssignable(node.expression, isBinding);
} else {
return super.isAssignable(node, isBinding);
}
}
toAssignable(node, isLHS = false) {
if (
!isLHS &&
node.type === 'AssignmentExpression' &&
node.left.type === 'TypeCastExpression'
) {
node.left = this.typeCastToParameter(node.left);
}
super.toAssignable(...arguments);
}
toAssignableList(exprList, trailingCommaLoc, isLHS) {
for (let i = 0; i < exprList.length; i++) {
const expr = exprList[i];
if ((expr == null ? void 0 : expr.type) === 'TypeCastExpression') {
exprList[i] = this.typeCastToParameter(expr);
}
}
super.toAssignableList(exprList, trailingCommaLoc, isLHS);
}
toReferencedList(exprList, isParenthesizedExpr) {
for (let i = 0; i < exprList.length; i++) {
var _expr$extra;
const expr = exprList[i];
if (
expr &&
expr.type === 'TypeCastExpression' &&
!((_expr$extra = expr.extra) != null && _expr$extra.parenthesized) &&
(exprList.length > 1 || !isParenthesizedExpr)
) {
this.raise(FlowErrors.TypeCastInPattern, {
at: expr.typeAnnotation,
});
}
}
return exprList;
}
parseArrayLike(close, canBePattern, isTuple, refExpressionErrors) {
const node = super.parseArrayLike(
close,
canBePattern,
isTuple,
refExpressionErrors
);
if (canBePattern && !this.state.maybeInArrowParameters) {
this.toReferencedList(node.elements);
}
return node;
}
isValidLVal(type, ...rest) {
return type === 'TypeCastExpression' || super.isValidLVal(type, ...rest);
}
parseClassProperty(node) {
if (this.match(14)) {
node.typeAnnotation = this.flowParseTypeAnnotation();
}
return super.parseClassProperty(node);
}
parseClassPrivateProperty(node) {
if (this.match(14)) {
node.typeAnnotation = this.flowParseTypeAnnotation();
}
return super.parseClassPrivateProperty(node);
}
isClassMethod() {
return this.match(47) || super.isClassMethod();
}
isClassProperty() {
return this.match(14) || super.isClassProperty();
}
isNonstaticConstructor(method) {
return !this.match(14) && super.isNonstaticConstructor(method);
}
pushClassMethod(
classBody,
method,
isGenerator,
isAsync,
isConstructor,
allowsDirectSuper
) {
if (method.variance) {
this.unexpected(method.variance.loc.start);
}
delete method.variance;
if (this.match(47)) {
method.typeParameters = this.flowParseTypeParameterDeclaration();
}
super.pushClassMethod(
classBody,
method,
isGenerator,
isAsync,
isConstructor,
allowsDirectSuper
);
if (method.params && isConstructor) {
const params = method.params;
if (params.length > 0 && this.isThisParam(params[0])) {
this.raise(FlowErrors.ThisParamBannedInConstructor, {
at: method,
});
}
} else if (
method.type === 'MethodDefinition' &&
isConstructor &&
method.value.params
) {
const params = method.value.params;
if (params.length > 0 && this.isThisParam(params[0])) {
this.raise(FlowErrors.ThisParamBannedInConstructor, {
at: method,
});
}
}
}
pushClassPrivateMethod(classBody, method, isGenerator, isAsync) {
if (method.variance) {
this.unexpected(method.variance.loc.start);
}
delete method.variance;
if (this.match(47)) {
method.typeParameters = this.flowParseTypeParameterDeclaration();
}
super.pushClassPrivateMethod(classBody, method, isGenerator, isAsync);
}
parseClassSuper(node) {
super.parseClassSuper(node);
if (node.superClass && this.match(47)) {
node.superTypeParameters = this.flowParseTypeParameterInstantiation();
}
if (this.isContextual(110)) {
this.next();
const implemented = (node.implements = []);
do {
const node = this.startNode();
node.id = this.flowParseRestrictedIdentifier(true);
if (this.match(47)) {
node.typeParameters = this.flowParseTypeParameterInstantiation();
} else {
node.typeParameters = null;
}
implemented.push(this.finishNode(node, 'ClassImplements'));
} while (this.eat(12));
}
}
checkGetterSetterParams(method) {
super.checkGetterSetterParams(method);
const params = this.getObjectOrClassMethodParams(method);
if (params.length > 0) {
const param = params[0];
if (this.isThisParam(param) && method.kind === 'get') {
this.raise(FlowErrors.GetterMayNotHaveThisParam, {
at: param,
});
} else if (this.isThisParam(param)) {
this.raise(FlowErrors.SetterMayNotHaveThisParam, {
at: param,
});
}
}
}
parsePropertyNamePrefixOperator(node) {
node.variance = this.flowParseVariance();
}
parseObjPropValue(
prop,
startPos,
startLoc,
isGenerator,
isAsync,
isPattern,
isAccessor,
refExpressionErrors
) {
if (prop.variance) {
this.unexpected(prop.variance.loc.start);
}
delete prop.variance;
let typeParameters;
if (this.match(47) && !isAccessor) {
typeParameters = this.flowParseTypeParameterDeclaration();
if (!this.match(10)) this.unexpected();
}
super.parseObjPropValue(
prop,
startPos,
startLoc,
isGenerator,
isAsync,
isPattern,
isAccessor,
refExpressionErrors
);
if (typeParameters) {
(prop.value || prop).typeParameters = typeParameters;
}
}
parseAssignableListItemTypes(param) {
if (this.eat(17)) {
if (param.type !== 'Identifier') {
this.raise(FlowErrors.PatternIsOptional, {
at: param,
});
}
if (this.isThisParam(param)) {
this.raise(FlowErrors.ThisParamMayNotBeOptional, {
at: param,
});
}
param.optional = true;
}
if (this.match(14)) {
param.typeAnnotation = this.flowParseTypeAnnotation();
} else if (this.isThisParam(param)) {
this.raise(FlowErrors.ThisParamAnnotationRequired, {
at: param,
});
}
if (this.match(29) && this.isThisParam(param)) {
this.raise(FlowErrors.ThisParamNoDefault, {
at: param,
});
}
this.resetEndLocation(param);
return param;
}
parseMaybeDefault(startPos, startLoc, left) {
const node = super.parseMaybeDefault(startPos, startLoc, left);
if (
node.type === 'AssignmentPattern' &&
node.typeAnnotation &&
node.right.start < node.typeAnnotation.start
) {
this.raise(FlowErrors.TypeBeforeInitializer, {
at: node.typeAnnotation,
});
}
return node;
}
shouldParseDefaultImport(node) {
if (!hasTypeImportKind(node)) {
return super.shouldParseDefaultImport(node);
}
return isMaybeDefaultImport(this.state.type);
}
parseImportSpecifierLocal(node, specifier, type) {
specifier.local =
hasTypeImportKind(node) ?
this.flowParseRestrictedIdentifier(true, true)
: this.parseIdentifier();
node.specifiers.push(this.finishImportSpecifier(specifier, type));
}
maybeParseDefaultImportSpecifier(node) {
node.importKind = 'value';
let kind = null;
if (this.match(87)) {
kind = 'typeof';
} else if (this.isContextual(126)) {
kind = 'type';
}
if (kind) {
const lh = this.lookahead();
const { type } = lh;
if (kind === 'type' && type === 55) {
this.unexpected(null, lh.type);
}
if (isMaybeDefaultImport(type) || type === 5 || type === 55) {
this.next();
node.importKind = kind;
}
}
return super.maybeParseDefaultImportSpecifier(node);
}
parseImportSpecifier(
specifier,
importedIsString,
isInTypeOnlyImport,
isMaybeTypeOnly
) {
const firstIdent = specifier.imported;
let specifierTypeKind = null;
if (firstIdent.type === 'Identifier') {
if (firstIdent.name === 'type') {
specifierTypeKind = 'type';
} else if (firstIdent.name === 'typeof') {
specifierTypeKind = 'typeof';
}
}
let isBinding = false;
if (this.isContextual(93) && !this.isLookaheadContextual('as')) {
const as_ident = this.parseIdentifier(true);
if (
specifierTypeKind !== null &&
!tokenIsKeywordOrIdentifier(this.state.type)
) {
specifier.imported = as_ident;
specifier.importKind = specifierTypeKind;
specifier.local = cloneIdentifier(as_ident);
} else {
specifier.imported = firstIdent;
specifier.importKind = null;
specifier.local = this.parseIdentifier();
}
} else {
if (
specifierTypeKind !== null &&
tokenIsKeywordOrIdentifier(this.state.type)
) {
specifier.imported = this.parseIdentifier(true);
specifier.importKind = specifierTypeKind;
} else {
if (importedIsString) {
throw this.raise(Errors.ImportBindingIsString, {
at: specifier,
importName: firstIdent.value,
});
}
specifier.imported = firstIdent;
specifier.importKind = null;
}
if (this.eatContextual(93)) {
specifier.local = this.parseIdentifier();
} else {
isBinding = true;
specifier.local = cloneIdentifier(specifier.imported);
}
}
const specifierIsTypeImport = hasTypeImportKind(specifier);
if (isInTypeOnlyImport && specifierIsTypeImport) {
this.raise(FlowErrors.ImportTypeShorthandOnlyInPureImport, {
at: specifier,
});
}
if (isInTypeOnlyImport || specifierIsTypeImport) {
this.checkReservedType(
specifier.local.name,
specifier.local.loc.start,
true
);
}
if (isBinding && !isInTypeOnlyImport && !specifierIsTypeImport) {
this.checkReservedWord(
specifier.local.name,
specifier.loc.start,
true,
true
);
}
return this.finishImportSpecifier(specifier, 'ImportSpecifier');
}
parseBindingAtom() {
switch (this.state.type) {
case 78:
return this.parseIdentifier(true);
default:
return super.parseBindingAtom();
}
}
parseFunctionParams(node, allowModifiers) {
const kind = node.kind;
if (kind !== 'get' && kind !== 'set' && this.match(47)) {
node.typeParameters = this.flowParseTypeParameterDeclaration();
}
super.parseFunctionParams(node, allowModifiers);
}
parseVarId(decl, kind) {
super.parseVarId(decl, kind);
if (this.match(14)) {
decl.id.typeAnnotation = this.flowParseTypeAnnotation();
this.resetEndLocation(decl.id);
}
}
parseAsyncArrowFromCallExpression(node, call) {
if (this.match(14)) {
const oldNoAnonFunctionType = this.state.noAnonFunctionType;
this.state.noAnonFunctionType = true;
node.returnType = this.flowParseTypeAnnotation();
this.state.noAnonFunctionType = oldNoAnonFunctionType;
}
return super.parseAsyncArrowFromCallExpression(node, call);
}
shouldParseAsyncArrow() {
return this.match(14) || super.shouldParseAsyncArrow();
}
parseMaybeAssign(refExpressionErrors, afterLeftParse) {
var _jsx;
let state = null;
let jsx;
if (this.hasPlugin('jsx') && (this.match(138) || this.match(47))) {
state = this.state.clone();
jsx = this.tryParse(
() => super.parseMaybeAssign(refExpressionErrors, afterLeftParse),
state
);
if (!jsx.error) return jsx.node;
const { context } = this.state;
const currentContext = context[context.length - 1];
if (
currentContext === types.j_oTag ||
currentContext === types.j_expr
) {
context.pop();
}
}
if (((_jsx = jsx) != null && _jsx.error) || this.match(47)) {
var _jsx2, _jsx3;
state = state || this.state.clone();
let typeParameters;
const arrow = this.tryParse((abort) => {
var _arrowExpression$extr;
typeParameters = this.flowParseTypeParameterDeclaration();
const arrowExpression = this.forwardNoArrowParamsConversionAt(
typeParameters,
() => {
const result = super.parseMaybeAssign(
refExpressionErrors,
afterLeftParse
);
this.resetStartLocationFromNode(result, typeParameters);
return result;
}
);
if (
(_arrowExpression$extr = arrowExpression.extra) != null &&
_arrowExpression$extr.parenthesized
)
abort();
const expr = this.maybeUnwrapTypeCastExpression(arrowExpression);
if (expr.type !== 'ArrowFunctionExpression') abort();
expr.typeParameters = typeParameters;
this.resetStartLocationFromNode(expr, typeParameters);
return arrowExpression;
}, state);
let arrowExpression = null;
if (
arrow.node &&
this.maybeUnwrapTypeCastExpression(arrow.node).type ===
'ArrowFunctionExpression'
) {
if (!arrow.error && !arrow.aborted) {
if (arrow.node.async) {
this.raise(
FlowErrors.UnexpectedTypeParameterBeforeAsyncArrowFunction,
{
at: typeParameters,
}
);
}
return arrow.node;
}
arrowExpression = arrow.node;
}
if ((_jsx2 = jsx) != null && _jsx2.node) {
this.state = jsx.failState;
return jsx.node;
}
if (arrowExpression) {
this.state = arrow.failState;
return arrowExpression;
}
if ((_jsx3 = jsx) != null && _jsx3.thrown) throw jsx.error;
if (arrow.thrown) throw arrow.error;
throw this.raise(FlowErrors.UnexpectedTokenAfterTypeParameter, {
at: typeParameters,
});
}
return super.parseMaybeAssign(refExpressionErrors, afterLeftParse);
}
parseArrow(node) {
if (this.match(14)) {
const result = this.tryParse(() => {
const oldNoAnonFunctionType = this.state.noAnonFunctionType;
this.state.noAnonFunctionType = true;
const typeNode = this.startNode();
[typeNode.typeAnnotation, node.predicate] =
this.flowParseTypeAndPredicateInitialiser();
this.state.noAnonFunctionType = oldNoAnonFunctionType;
if (this.canInsertSemicolon()) this.unexpected();
if (!this.match(19)) this.unexpected();
return typeNode;
});
if (result.thrown) return null;
if (result.error) this.state = result.failState;
node.returnType =
result.node.typeAnnotation ?
this.finishNode(result.node, 'TypeAnnotation')
: null;
}
return super.parseArrow(node);
}
shouldParseArrow(params) {
return this.match(14) || super.shouldParseArrow(params);
}
setArrowFunctionParameters(node, params) {
if (this.state.noArrowParamsConversionAt.indexOf(node.start) !== -1) {
node.params = params;
} else {
super.setArrowFunctionParameters(node, params);
}
}
checkParams(node, allowDuplicates, isArrowFunction) {
if (
isArrowFunction &&
this.state.noArrowParamsConversionAt.indexOf(node.start) !== -1
) {
return;
}
for (let i = 0; i < node.params.length; i++) {
if (this.isThisParam(node.params[i]) && i > 0) {
this.raise(FlowErrors.ThisParamMustBeFirst, {
at: node.params[i],
});
}
}
return super.checkParams(...arguments);
}
parseParenAndDistinguishExpression(canBeArrow) {
return super.parseParenAndDistinguishExpression(
canBeArrow && this.state.noArrowAt.indexOf(this.state.start) === -1
);
}
parseSubscripts(base, startPos, startLoc, noCalls) {
if (
base.type === 'Identifier' &&
base.name === 'async' &&
this.state.noArrowAt.indexOf(startPos) !== -1
) {
this.next();
const node = this.startNodeAt(startPos, startLoc);
node.callee = base;
node.arguments = this.parseCallExpressionArguments(11, false);
base = this.finishNode(node, 'CallExpression');
} else if (
base.type === 'Identifier' &&
base.name === 'async' &&
this.match(47)
) {
const state = this.state.clone();
const arrow = this.tryParse(
(abort) =>
this.parseAsyncArrowWithTypeParameters(startPos, startLoc) ||
abort(),
state
);
if (!arrow.error && !arrow.aborted) return arrow.node;
const result = this.tryParse(
() => super.parseSubscripts(base, startPos, startLoc, noCalls),
state
);
if (result.node && !result.error) return result.node;
if (arrow.node) {
this.state = arrow.failState;
return arrow.node;
}
if (result.node) {
this.state = result.failState;
return result.node;
}
throw arrow.error || result.error;
}
return super.parseSubscripts(base, startPos, startLoc, noCalls);
}
parseSubscript(base, startPos, startLoc, noCalls, subscriptState) {
if (this.match(18) && this.isLookaheadToken_lt()) {
subscriptState.optionalChainMember = true;
if (noCalls) {
subscriptState.stop = true;
return base;
}
this.next();
const node = this.startNodeAt(startPos, startLoc);
node.callee = base;
node.typeArguments = this.flowParseTypeParameterInstantiation();
this.expect(10);
node.arguments = this.parseCallExpressionArguments(11, false);
node.optional = true;
return this.finishCallExpression(node, true);
} else if (!noCalls && this.shouldParseTypes() && this.match(47)) {
const node = this.startNodeAt(startPos, startLoc);
node.callee = base;
const result = this.tryParse(() => {
node.typeArguments =
this.flowParseTypeParameterInstantiationCallOrNew();
this.expect(10);
node.arguments = this.parseCallExpressionArguments(11, false);
if (subscriptState.optionalChainMember) node.optional = false;
return this.finishCallExpression(
node,
subscriptState.optionalChainMember
);
});
if (result.node) {
if (result.error) this.state = result.failState;
return result.node;
}
}
return super.parseSubscript(
base,
startPos,
startLoc,
noCalls,
subscriptState
);
}
parseNewCallee(node) {
super.parseNewCallee(node);
let targs = null;
if (this.shouldParseTypes() && this.match(47)) {
targs = this.tryParse(() =>
this.flowParseTypeParameterInstantiationCallOrNew()
).node;
}
node.typeArguments = targs;
}
parseAsyncArrowWithTypeParameters(startPos, startLoc) {
const node = this.startNodeAt(startPos, startLoc);
this.parseFunctionParams(node);
if (!this.parseArrow(node)) return;
return this.parseArrowExpression(node, undefined, true);
}
readToken_mult_modulo(code) {
const next = this.input.charCodeAt(this.state.pos + 1);
if (code === 42 && next === 47 && this.state.hasFlowComment) {
this.state.hasFlowComment = false;
this.state.pos += 2;
this.nextToken();
return;
}
super.readToken_mult_modulo(code);
}
readToken_pipe_amp(code) {
const next = this.input.charCodeAt(this.state.pos + 1);
if (code === 124 && next === 125) {
this.finishOp(9, 2);
return;
}
super.readToken_pipe_amp(code);
}
parseTopLevel(file, program) {
const fileNode = super.parseTopLevel(file, program);
if (this.state.hasFlowComment) {
this.raise(FlowErrors.UnterminatedFlowComment, {
at: this.state.curPosition(),
});
}
return fileNode;
}
skipBlockComment() {
if (this.hasPlugin('flowComments') && this.skipFlowComment()) {
if (this.state.hasFlowComment) {
throw this.raise(FlowErrors.NestedFlowComment, {
at: this.state.startLoc,
});
}
this.hasFlowCommentCompletion();
this.state.pos += this.skipFlowComment();
this.state.hasFlowComment = true;
return;
}
if (this.state.hasFlowComment) {
const end = this.input.indexOf('*-/', this.state.pos + 2);
if (end === -1) {
throw this.raise(Errors.UnterminatedComment, {
at: this.state.curPosition(),
});
}
this.state.pos = end + 2 + 3;
return;
}
return super.skipBlockComment();
}
skipFlowComment() {
const { pos } = this.state;
let shiftToFirstNonWhiteSpace = 2;
while (
[32, 9].includes(this.input.charCodeAt(pos + shiftToFirstNonWhiteSpace))
) {
shiftToFirstNonWhiteSpace++;
}
const ch2 = this.input.charCodeAt(shiftToFirstNonWhiteSpace + pos);
const ch3 = this.input.charCodeAt(shiftToFirstNonWhiteSpace + pos + 1);
if (ch2 === 58 && ch3 === 58) {
return shiftToFirstNonWhiteSpace + 2;
}
if (
this.input.slice(
shiftToFirstNonWhiteSpace + pos,
shiftToFirstNonWhiteSpace + pos + 12
) === 'flow-include'
) {
return shiftToFirstNonWhiteSpace + 12;
}
if (ch2 === 58 && ch3 !== 58) {
return shiftToFirstNonWhiteSpace;
}
return false;
}
hasFlowCommentCompletion() {
const end = this.input.indexOf('*/', this.state.pos);
if (end === -1) {
throw this.raise(Errors.UnterminatedComment, {
at: this.state.curPosition(),
});
}
}
flowEnumErrorBooleanMemberNotInitialized(loc, { enumName, memberName }) {
this.raise(FlowErrors.EnumBooleanMemberNotInitialized, {
at: loc,
memberName,
enumName,
});
}
flowEnumErrorInvalidMemberInitializer(loc, enumContext) {
return this.raise(
!enumContext.explicitType ?
FlowErrors.EnumInvalidMemberInitializerUnknownType
: enumContext.explicitType === 'symbol' ?
FlowErrors.EnumInvalidMemberInitializerSymbolType
: FlowErrors.EnumInvalidMemberInitializerPrimaryType,
Object.assign(
{
at: loc,
},
enumContext
)
);
}
flowEnumErrorNumberMemberNotInitialized(loc, { enumName, memberName }) {
this.raise(FlowErrors.EnumNumberMemberNotInitialized, {
at: loc,
enumName,
memberName,
});
}
flowEnumErrorStringMemberInconsistentlyInitailized(node, { enumName }) {
this.raise(FlowErrors.EnumStringMemberInconsistentlyInitailized, {
at: node,
enumName,
});
}
flowEnumMemberInit() {
const startLoc = this.state.startLoc;
const endOfInit = () => this.match(12) || this.match(8);
switch (this.state.type) {
case 130: {
const literal = this.parseNumericLiteral(this.state.value);
if (endOfInit()) {
return {
type: 'number',
loc: literal.loc.start,
value: literal,
};
}
return {
type: 'invalid',
loc: startLoc,
};
}
case 129: {
const literal = this.parseStringLiteral(this.state.value);
if (endOfInit()) {
return {
type: 'string',
loc: literal.loc.start,
value: literal,
};
}
return {
type: 'invalid',
loc: startLoc,
};
}
case 85:
case 86: {
const literal = this.parseBooleanLiteral(this.match(85));
if (endOfInit()) {
return {
type: 'boolean',
loc: literal.loc.start,
value: literal,
};
}
return {
type: 'invalid',
loc: startLoc,
};
}
default:
return {
type: 'invalid',
loc: startLoc,
};
}
}
flowEnumMemberRaw() {
const loc = this.state.startLoc;
const id = this.parseIdentifier(true);
const init =
this.eat(29) ?
this.flowEnumMemberInit()
: {
type: 'none',
loc,
};
return {
id,
init,
};
}
flowEnumCheckExplicitTypeMismatch(loc, context, expectedType) {
const { explicitType } = context;
if (explicitType === null) {
return;
}
if (explicitType !== expectedType) {
this.flowEnumErrorInvalidMemberInitializer(loc, context);
}
}
flowEnumMembers({ enumName, explicitType }) {
const seenNames = new Set();
const members = {
booleanMembers: [],
numberMembers: [],
stringMembers: [],
defaultedMembers: [],
};
let hasUnknownMembers = false;
while (!this.match(8)) {
if (this.eat(21)) {
hasUnknownMembers = true;
break;
}
const memberNode = this.startNode();
const { id, init } = this.flowEnumMemberRaw();
const memberName = id.name;
if (memberName === '') {
continue;
}
if (/^[a-z]/.test(memberName)) {
this.raise(FlowErrors.EnumInvalidMemberName, {
at: id,
memberName,
suggestion: memberName[0].toUpperCase() + memberName.slice(1),
enumName,
});
}
if (seenNames.has(memberName)) {
this.raise(FlowErrors.EnumDuplicateMemberName, {
at: id,
memberName,
enumName,
});
}
seenNames.add(memberName);
const context = {
enumName,
explicitType,
memberName,
};
memberNode.id = id;
switch (init.type) {
case 'boolean': {
this.flowEnumCheckExplicitTypeMismatch(
init.loc,
context,
'boolean'
);
memberNode.init = init.value;
members.booleanMembers.push(
this.finishNode(memberNode, 'EnumBooleanMember')
);
break;
}
case 'number': {
this.flowEnumCheckExplicitTypeMismatch(init.loc, context, 'number');
memberNode.init = init.value;
members.numberMembers.push(
this.finishNode(memberNode, 'EnumNumberMember')
);
break;
}
case 'string': {
this.flowEnumCheckExplicitTypeMismatch(init.loc, context, 'string');
memberNode.init = init.value;
members.stringMembers.push(
this.finishNode(memberNode, 'EnumStringMember')
);
break;
}
case 'invalid': {
throw this.flowEnumErrorInvalidMemberInitializer(init.loc, context);
}
case 'none': {
switch (explicitType) {
case 'boolean':
this.flowEnumErrorBooleanMemberNotInitialized(
init.loc,
context
);
break;
case 'number':
this.flowEnumErrorNumberMemberNotInitialized(init.loc, context);
break;
default:
members.defaultedMembers.push(
this.finishNode(memberNode, 'EnumDefaultedMember')
);
}
}
}
if (!this.match(8)) {
this.expect(12);
}
}
return {
members,
hasUnknownMembers,
};
}
flowEnumStringMembers(initializedMembers, defaultedMembers, { enumName }) {
if (initializedMembers.length === 0) {
return defaultedMembers;
} else if (defaultedMembers.length === 0) {
return initializedMembers;
} else if (defaultedMembers.length > initializedMembers.length) {
for (const member of initializedMembers) {
this.flowEnumErrorStringMemberInconsistentlyInitailized(member, {
enumName,
});
}
return defaultedMembers;
} else {
for (const member of defaultedMembers) {
this.flowEnumErrorStringMemberInconsistentlyInitailized(member, {
enumName,
});
}
return initializedMembers;
}
}
flowEnumParseExplicitType({ enumName }) {
if (!this.eatContextual(101)) return null;
if (!tokenIsIdentifier(this.state.type)) {
throw this.raise(FlowErrors.EnumInvalidExplicitTypeUnknownSupplied, {
at: this.state.startLoc,
enumName,
});
}
const { value } = this.state;
this.next();
if (
value !== 'boolean' &&
value !== 'number' &&
value !== 'string' &&
value !== 'symbol'
) {
this.raise(FlowErrors.EnumInvalidExplicitType, {
at: this.state.startLoc,
enumName,
invalidEnumType: value,
});
}
return value;
}
flowEnumBody(node, id) {
const enumName = id.name;
const nameLoc = id.loc.start;
const explicitType = this.flowEnumParseExplicitType({
enumName,
});
this.expect(5);
const { members, hasUnknownMembers } = this.flowEnumMembers({
enumName,
explicitType,
});
node.hasUnknownMembers = hasUnknownMembers;
switch (explicitType) {
case 'boolean':
node.explicitType = true;
node.members = members.booleanMembers;
this.expect(8);
return this.finishNode(node, 'EnumBooleanBody');
case 'number':
node.explicitType = true;
node.members = members.numberMembers;
this.expect(8);
return this.finishNode(node, 'EnumNumberBody');
case 'string':
node.explicitType = true;
node.members = this.flowEnumStringMembers(
members.stringMembers,
members.defaultedMembers,
{
enumName,
}
);
this.expect(8);
return this.finishNode(node, 'EnumStringBody');
case 'symbol':
node.members = members.defaultedMembers;
this.expect(8);
return this.finishNode(node, 'EnumSymbolBody');
default: {
const empty = () => {
node.members = [];
this.expect(8);
return this.finishNode(node, 'EnumStringBody');
};
node.explicitType = false;
const boolsLen = members.booleanMembers.length;
const numsLen = members.numberMembers.length;
const strsLen = members.stringMembers.length;
const defaultedLen = members.defaultedMembers.length;
if (!boolsLen && !numsLen && !strsLen && !defaultedLen) {
return empty();
} else if (!boolsLen && !numsLen) {
node.members = this.flowEnumStringMembers(
members.stringMembers,
members.defaultedMembers,
{
enumName,
}
);
this.expect(8);
return this.finishNode(node, 'EnumStringBody');
} else if (!numsLen && !strsLen && boolsLen >= defaultedLen) {
for (const member of members.defaultedMembers) {
this.flowEnumErrorBooleanMemberNotInitialized(member.loc.start, {
enumName,
memberName: member.id.name,
});
}
node.members = members.booleanMembers;
this.expect(8);
return this.finishNode(node, 'EnumBooleanBody');
} else if (!boolsLen && !strsLen && numsLen >= defaultedLen) {
for (const member of members.defaultedMembers) {
this.flowEnumErrorNumberMemberNotInitialized(member.loc.start, {
enumName,
memberName: member.id.name,
});
}
node.members = members.numberMembers;
this.expect(8);
return this.finishNode(node, 'EnumNumberBody');
} else {
this.raise(FlowErrors.EnumInconsistentMemberValues, {
at: nameLoc,
enumName,
});
return empty();
}
}
}
}
flowParseEnumDeclaration(node) {
const id = this.parseIdentifier();
node.id = id;
node.body = this.flowEnumBody(this.startNode(), id);
return this.finishNode(node, 'EnumDeclaration');
}
isLookaheadToken_lt() {
const next = this.nextTokenStart();
if (this.input.charCodeAt(next) === 60) {
const afterNext = this.input.charCodeAt(next + 1);
return afterNext !== 60 && afterNext !== 61;
}
return false;
}
maybeUnwrapTypeCastExpression(node) {
return node.type === 'TypeCastExpression' ? node.expression : node;
}
};
const entities = {
__proto__: null,
quot: '\u0022',
amp: '&',
apos: '\u0027',
lt: '<',
gt: '>',
nbsp: '\u00A0',
iexcl: '\u00A1',
cent: '\u00A2',
pound: '\u00A3',
curren: '\u00A4',
yen: '\u00A5',
brvbar: '\u00A6',
sect: '\u00A7',
uml: '\u00A8',
copy: '\u00A9',
ordf: '\u00AA',
laquo: '\u00AB',
not: '\u00AC',
shy: '\u00AD',
reg: '\u00AE',
macr: '\u00AF',
deg: '\u00B0',
plusmn: '\u00B1',
sup2: '\u00B2',
sup3: '\u00B3',
acute: '\u00B4',
micro: '\u00B5',
para: '\u00B6',
middot: '\u00B7',
cedil: '\u00B8',
sup1: '\u00B9',
ordm: '\u00BA',
raquo: '\u00BB',
frac14: '\u00BC',
frac12: '\u00BD',
frac34: '\u00BE',
iquest: '\u00BF',
Agrave: '\u00C0',
Aacute: '\u00C1',
Acirc: '\u00C2',
Atilde: '\u00C3',
Auml: '\u00C4',
Aring: '\u00C5',
AElig: '\u00C6',
Ccedil: '\u00C7',
Egrave: '\u00C8',
Eacute: '\u00C9',
Ecirc: '\u00CA',
Euml: '\u00CB',
Igrave: '\u00CC',
Iacute: '\u00CD',
Icirc: '\u00CE',
Iuml: '\u00CF',
ETH: '\u00D0',
Ntilde: '\u00D1',
Ograve: '\u00D2',
Oacute: '\u00D3',
Ocirc: '\u00D4',
Otilde: '\u00D5',
Ouml: '\u00D6',
times: '\u00D7',
Oslash: '\u00D8',
Ugrave: '\u00D9',
Uacute: '\u00DA',
Ucirc: '\u00DB',
Uuml: '\u00DC',
Yacute: '\u00DD',
THORN: '\u00DE',
szlig: '\u00DF',
agrave: '\u00E0',
aacute: '\u00E1',
acirc: '\u00E2',
atilde: '\u00E3',
auml: '\u00E4',
aring: '\u00E5',
aelig: '\u00E6',
ccedil: '\u00E7',
egrave: '\u00E8',
eacute: '\u00E9',
ecirc: '\u00EA',
euml: '\u00EB',
igrave: '\u00EC',
iacute: '\u00ED',
icirc: '\u00EE',
iuml: '\u00EF',
eth: '\u00F0',
ntilde: '\u00F1',
ograve: '\u00F2',
oacute: '\u00F3',
ocirc: '\u00F4',
otilde: '\u00F5',
ouml: '\u00F6',
divide: '\u00F7',
oslash: '\u00F8',
ugrave: '\u00F9',
uacute: '\u00FA',
ucirc: '\u00FB',
uuml: '\u00FC',
yacute: '\u00FD',
thorn: '\u00FE',
yuml: '\u00FF',
OElig: '\u0152',
oelig: '\u0153',
Scaron: '\u0160',
scaron: '\u0161',
Yuml: '\u0178',
fnof: '\u0192',
circ: '\u02C6',
tilde: '\u02DC',
Alpha: '\u0391',
Beta: '\u0392',
Gamma: '\u0393',
Delta: '\u0394',
Epsilon: '\u0395',
Zeta: '\u0396',
Eta: '\u0397',
Theta: '\u0398',
Iota: '\u0399',
Kappa: '\u039A',
Lambda: '\u039B',
Mu: '\u039C',
Nu: '\u039D',
Xi: '\u039E',
Omicron: '\u039F',
Pi: '\u03A0',
Rho: '\u03A1',
Sigma: '\u03A3',
Tau: '\u03A4',
Upsilon: '\u03A5',
Phi: '\u03A6',
Chi: '\u03A7',
Psi: '\u03A8',
Omega: '\u03A9',
alpha: '\u03B1',
beta: '\u03B2',
gamma: '\u03B3',
delta: '\u03B4',
epsilon: '\u03B5',
zeta: '\u03B6',
eta: '\u03B7',
theta: '\u03B8',
iota: '\u03B9',
kappa: '\u03BA',
lambda: '\u03BB',
mu: '\u03BC',
nu: '\u03BD',
xi: '\u03BE',
omicron: '\u03BF',
pi: '\u03C0',
rho: '\u03C1',
sigmaf: '\u03C2',
sigma: '\u03C3',
tau: '\u03C4',
upsilon: '\u03C5',
phi: '\u03C6',
chi: '\u03C7',
psi: '\u03C8',
omega: '\u03C9',
thetasym: '\u03D1',
upsih: '\u03D2',
piv: '\u03D6',
ensp: '\u2002',
emsp: '\u2003',
thinsp: '\u2009',
zwnj: '\u200C',
zwj: '\u200D',
lrm: '\u200E',
rlm: '\u200F',
ndash: '\u2013',
mdash: '\u2014',
lsquo: '\u2018',
rsquo: '\u2019',
sbquo: '\u201A',
ldquo: '\u201C',
rdquo: '\u201D',
bdquo: '\u201E',
dagger: '\u2020',
Dagger: '\u2021',
bull: '\u2022',
hellip: '\u2026',
permil: '\u2030',
prime: '\u2032',
Prime: '\u2033',
lsaquo: '\u2039',
rsaquo: '\u203A',
oline: '\u203E',
frasl: '\u2044',
euro: '\u20AC',
image: '\u2111',
weierp: '\u2118',
real: '\u211C',
trade: '\u2122',
alefsym: '\u2135',
larr: '\u2190',
uarr: '\u2191',
rarr: '\u2192',
darr: '\u2193',
harr: '\u2194',
crarr: '\u21B5',
lArr: '\u21D0',
uArr: '\u21D1',
rArr: '\u21D2',
dArr: '\u21D3',
hArr: '\u21D4',
forall: '\u2200',
part: '\u2202',
exist: '\u2203',
empty: '\u2205',
nabla: '\u2207',
isin: '\u2208',
notin: '\u2209',
ni: '\u220B',
prod: '\u220F',
sum: '\u2211',
minus: '\u2212',
lowast: '\u2217',
radic: '\u221A',
prop: '\u221D',
infin: '\u221E',
ang: '\u2220',
and: '\u2227',
or: '\u2228',
cap: '\u2229',
cup: '\u222A',
int: '\u222B',
there4: '\u2234',
sim: '\u223C',
cong: '\u2245',
asymp: '\u2248',
ne: '\u2260',
equiv: '\u2261',
le: '\u2264',
ge: '\u2265',
sub: '\u2282',
sup: '\u2283',
nsub: '\u2284',
sube: '\u2286',
supe: '\u2287',
oplus: '\u2295',
otimes: '\u2297',
perp: '\u22A5',
sdot: '\u22C5',
lceil: '\u2308',
rceil: '\u2309',
lfloor: '\u230A',
rfloor: '\u230B',
lang: '\u2329',
rang: '\u232A',
loz: '\u25CA',
spades: '\u2660',
clubs: '\u2663',
hearts: '\u2665',
diams: '\u2666',
};
const JsxErrors = ParseErrorEnum`jsx`((_) => ({
AttributeIsEmpty: _(
'JSX attributes must only be assigned a non-empty expression.'
),
MissingClosingTagElement: _(
({ openingTagName }) =>
`Expected corresponding JSX closing tag for <${openingTagName}>.`
),
MissingClosingTagFragment: _(
'Expected corresponding JSX closing tag for <>.'
),
UnexpectedSequenceExpression: _(
'Sequence expressions cannot be directly nested inside JSX. Did you mean to wrap it in parentheses (...)?'
),
UnexpectedToken: _(
({ unexpected, HTMLEntity }) =>
`Unexpected token \`${unexpected}\`. Did you mean \`${HTMLEntity}\` or \`{'${unexpected}'}\`?`
),
UnsupportedJsxValue: _(
'JSX value should be either an expression or a quoted JSX text.'
),
UnterminatedJsxContent: _('Unterminated JSX contents.'),
UnwrappedAdjacentJSXElements: _(
'Adjacent JSX elements must be wrapped in an enclosing tag. Did you want a JSX fragment <>...</>?'
),
}));
function isFragment(object) {
return object ?
object.type === 'JSXOpeningFragment' ||
object.type === 'JSXClosingFragment'
: false;
}
function getQualifiedJSXName(object) {
if (object.type === 'JSXIdentifier') {
return object.name;
}
if (object.type === 'JSXNamespacedName') {
return object.namespace.name + ':' + object.name.name;
}
if (object.type === 'JSXMemberExpression') {
return (
getQualifiedJSXName(object.object) +
'.' +
getQualifiedJSXName(object.property)
);
}
throw new Error('Node had unexpected type: ' + object.type);
}
var jsx = (superClass) =>
class extends superClass {
jsxReadToken() {
let out = '';
let chunkStart = this.state.pos;
for (;;) {
if (this.state.pos >= this.length) {
throw this.raise(JsxErrors.UnterminatedJsxContent, {
at: this.state.startLoc,
});
}
const ch = this.input.charCodeAt(this.state.pos);
switch (ch) {
case 60:
case 123:
if (this.state.pos === this.state.start) {
if (ch === 60 && this.state.canStartJSXElement) {
++this.state.pos;
return this.finishToken(138);
}
return super.getTokenFromCode(ch);
}
out += this.input.slice(chunkStart, this.state.pos);
return this.finishToken(137, out);
case 38:
out += this.input.slice(chunkStart, this.state.pos);
out += this.jsxReadEntity();
chunkStart = this.state.pos;
break;
case 62:
case 125:
default:
if (isNewLine(ch)) {
out += this.input.slice(chunkStart, this.state.pos);
out += this.jsxReadNewLine(true);
chunkStart = this.state.pos;
} else {
++this.state.pos;
}
}
}
}
jsxReadNewLine(normalizeCRLF) {
const ch = this.input.charCodeAt(this.state.pos);
let out;
++this.state.pos;
if (ch === 13 && this.input.charCodeAt(this.state.pos) === 10) {
++this.state.pos;
out = normalizeCRLF ? '\n' : '\r\n';
} else {
out = String.fromCharCode(ch);
}
++this.state.curLine;
this.state.lineStart = this.state.pos;
return out;
}
jsxReadString(quote) {
let out = '';
let chunkStart = ++this.state.pos;
for (;;) {
if (this.state.pos >= this.length) {
throw this.raise(Errors.UnterminatedString, {
at: this.state.startLoc,
});
}
const ch = this.input.charCodeAt(this.state.pos);
if (ch === quote) break;
if (ch === 38) {
out += this.input.slice(chunkStart, this.state.pos);
out += this.jsxReadEntity();
chunkStart = this.state.pos;
} else if (isNewLine(ch)) {
out += this.input.slice(chunkStart, this.state.pos);
out += this.jsxReadNewLine(false);
chunkStart = this.state.pos;
} else {
++this.state.pos;
}
}
out += this.input.slice(chunkStart, this.state.pos++);
return this.finishToken(129, out);
}
jsxReadEntity() {
const startPos = ++this.state.pos;
if (this.codePointAtPos(this.state.pos) === 35) {
++this.state.pos;
let radix = 10;
if (this.codePointAtPos(this.state.pos) === 120) {
radix = 16;
++this.state.pos;
}
const codePoint = this.readInt(radix, undefined, false, 'bail');
if (codePoint !== null && this.codePointAtPos(this.state.pos) === 59) {
++this.state.pos;
return String.fromCodePoint(codePoint);
}
} else {
let count = 0;
let semi = false;
while (
count++ < 10 &&
this.state.pos < this.length &&
!(semi = this.codePointAtPos(this.state.pos) == 59)
) {
++this.state.pos;
}
if (semi) {
const desc = this.input.slice(startPos, this.state.pos);
const entity = entities[desc];
++this.state.pos;
if (entity) {
return entity;
}
}
}
this.state.pos = startPos;
return '&';
}
jsxReadWord() {
let ch;
const start = this.state.pos;
do {
ch = this.input.charCodeAt(++this.state.pos);
} while (isIdentifierChar(ch) || ch === 45);
return this.finishToken(136, this.input.slice(start, this.state.pos));
}
jsxParseIdentifier() {
const node = this.startNode();
if (this.match(136)) {
node.name = this.state.value;
} else if (tokenIsKeyword(this.state.type)) {
node.name = tokenLabelName(this.state.type);
} else {
this.unexpected();
}
this.next();
return this.finishNode(node, 'JSXIdentifier');
}
jsxParseNamespacedName() {
const startPos = this.state.start;
const startLoc = this.state.startLoc;
const name = this.jsxParseIdentifier();
if (!this.eat(14)) return name;
const node = this.startNodeAt(startPos, startLoc);
node.namespace = name;
node.name = this.jsxParseIdentifier();
return this.finishNode(node, 'JSXNamespacedName');
}
jsxParseElementName() {
const startPos = this.state.start;
const startLoc = this.state.startLoc;
let node = this.jsxParseNamespacedName();
if (node.type === 'JSXNamespacedName') {
return node;
}
while (this.eat(16)) {
const newNode = this.startNodeAt(startPos, startLoc);
newNode.object = node;
newNode.property = this.jsxParseIdentifier();
node = this.finishNode(newNode, 'JSXMemberExpression');
}
return node;
}
jsxParseAttributeValue() {
let node;
switch (this.state.type) {
case 5:
node = this.startNode();
this.setContext(types.brace);
this.next();
node = this.jsxParseExpressionContainer(node, types.j_oTag);
if (node.expression.type === 'JSXEmptyExpression') {
this.raise(JsxErrors.AttributeIsEmpty, {
at: node,
});
}
return node;
case 138:
case 129:
return this.parseExprAtom();
default:
throw this.raise(JsxErrors.UnsupportedJsxValue, {
at: this.state.startLoc,
});
}
}
jsxParseEmptyExpression() {
const node = this.startNodeAt(
this.state.lastTokEndLoc.index,
this.state.lastTokEndLoc
);
return this.finishNodeAt(node, 'JSXEmptyExpression', this.state.startLoc);
}
jsxParseSpreadChild(node) {
this.next();
node.expression = this.parseExpression();
this.setContext(types.j_oTag);
this.state.canStartJSXElement = true;
this.expect(8);
return this.finishNode(node, 'JSXSpreadChild');
}
jsxParseExpressionContainer(node, previousContext) {
if (this.match(8)) {
node.expression = this.jsxParseEmptyExpression();
} else {
const expression = this.parseExpression();
node.expression = expression;
}
this.setContext(previousContext);
this.state.canStartJSXElement = true;
this.expect(8);
return this.finishNode(node, 'JSXExpressionContainer');
}
jsxParseAttribute() {
const node = this.startNode();
if (this.match(5)) {
this.setContext(types.brace);
this.next();
this.expect(21);
node.argument = this.parseMaybeAssignAllowIn();
this.setContext(types.j_oTag);
this.state.canStartJSXElement = true;
this.expect(8);
return this.finishNode(node, 'JSXSpreadAttribute');
}
node.name = this.jsxParseNamespacedName();
node.value = this.eat(29) ? this.jsxParseAttributeValue() : null;
return this.finishNode(node, 'JSXAttribute');
}
jsxParseOpeningElementAt(startPos, startLoc) {
const node = this.startNodeAt(startPos, startLoc);
if (this.eat(139)) {
return this.finishNode(node, 'JSXOpeningFragment');
}
node.name = this.jsxParseElementName();
return this.jsxParseOpeningElementAfterName(node);
}
jsxParseOpeningElementAfterName(node) {
const attributes = [];
while (!this.match(56) && !this.match(139)) {
attributes.push(this.jsxParseAttribute());
}
node.attributes = attributes;
node.selfClosing = this.eat(56);
this.expect(139);
return this.finishNode(node, 'JSXOpeningElement');
}
jsxParseClosingElementAt(startPos, startLoc) {
const node = this.startNodeAt(startPos, startLoc);
if (this.eat(139)) {
return this.finishNode(node, 'JSXClosingFragment');
}
node.name = this.jsxParseElementName();
this.expect(139);
return this.finishNode(node, 'JSXClosingElement');
}
jsxParseElementAt(startPos, startLoc) {
const node = this.startNodeAt(startPos, startLoc);
const children = [];
const openingElement = this.jsxParseOpeningElementAt(startPos, startLoc);
let closingElement = null;
if (!openingElement.selfClosing) {
contents: for (;;) {
switch (this.state.type) {
case 138:
startPos = this.state.start;
startLoc = this.state.startLoc;
this.next();
if (this.eat(56)) {
closingElement = this.jsxParseClosingElementAt(
startPos,
startLoc
);
break contents;
}
children.push(this.jsxParseElementAt(startPos, startLoc));
break;
case 137:
children.push(this.parseExprAtom());
break;
case 5: {
const node = this.startNode();
this.setContext(types.brace);
this.next();
if (this.match(21)) {
children.push(this.jsxParseSpreadChild(node));
} else {
children.push(
this.jsxParseExpressionContainer(node, types.j_expr)
);
}
break;
}
default:
throw this.unexpected();
}
}
if (
isFragment(openingElement) &&
!isFragment(closingElement) &&
closingElement !== null
) {
this.raise(JsxErrors.MissingClosingTagFragment, {
at: closingElement,
});
} else if (!isFragment(openingElement) && isFragment(closingElement)) {
this.raise(JsxErrors.MissingClosingTagElement, {
at: closingElement,
openingTagName: getQualifiedJSXName(openingElement.name),
});
} else if (!isFragment(openingElement) && !isFragment(closingElement)) {
if (
getQualifiedJSXName(closingElement.name) !==
getQualifiedJSXName(openingElement.name)
) {
this.raise(JsxErrors.MissingClosingTagElement, {
at: closingElement,
openingTagName: getQualifiedJSXName(openingElement.name),
});
}
}
}
if (isFragment(openingElement)) {
node.openingFragment = openingElement;
node.closingFragment = closingElement;
} else {
node.openingElement = openingElement;
node.closingElement = closingElement;
}
node.children = children;
if (this.match(47)) {
throw this.raise(JsxErrors.UnwrappedAdjacentJSXElements, {
at: this.state.startLoc,
});
}
return isFragment(openingElement) ?
this.finishNode(node, 'JSXFragment')
: this.finishNode(node, 'JSXElement');
}
jsxParseElement() {
const startPos = this.state.start;
const startLoc = this.state.startLoc;
this.next();
return this.jsxParseElementAt(startPos, startLoc);
}
setContext(newContext) {
const { context } = this.state;
context[context.length - 1] = newContext;
}
parseExprAtom(refExpressionErrors) {
if (this.match(137)) {
return this.parseLiteral(this.state.value, 'JSXText');
} else if (this.match(138)) {
return this.jsxParseElement();
} else if (
this.match(47) &&
this.input.charCodeAt(this.state.pos) !== 33
) {
this.replaceToken(138);
return this.jsxParseElement();
} else {
return super.parseExprAtom(refExpressionErrors);
}
}
skipSpace() {
const curContext = this.curContext();
if (!curContext.preserveSpace) super.skipSpace();
}
getTokenFromCode(code) {
const context = this.curContext();
if (context === types.j_expr) {
return this.jsxReadToken();
}
if (context === types.j_oTag || context === types.j_cTag) {
if (isIdentifierStart(code)) {
return this.jsxReadWord();
}
if (code === 62) {
++this.state.pos;
return this.finishToken(139);
}
if ((code === 34 || code === 39) && context === types.j_oTag) {
return this.jsxReadString(code);
}
}
if (
code === 60 &&
this.state.canStartJSXElement &&
this.input.charCodeAt(this.state.pos + 1) !== 33
) {
++this.state.pos;
return this.finishToken(138);
}
return super.getTokenFromCode(code);
}
updateContext(prevType) {
const { context, type } = this.state;
if (type === 56 && prevType === 138) {
context.splice(-2, 2, types.j_cTag);
this.state.canStartJSXElement = false;
} else if (type === 138) {
context.push(types.j_oTag);
} else if (type === 139) {
const out = context[context.length - 1];
if ((out === types.j_oTag && prevType === 56) || out === types.j_cTag) {
context.pop();
this.state.canStartJSXElement =
context[context.length - 1] === types.j_expr;
} else {
this.setContext(types.j_expr);
this.state.canStartJSXElement = true;
}
} else {
this.state.canStartJSXElement = tokenComesBeforeExpression(type);
}
}
};
class TypeScriptScope extends Scope {
constructor(...args) {
super(...args);
this.types = new Set();
this.enums = new Set();
this.constEnums = new Set();
this.classes = new Set();
this.exportOnlyBindings = new Set();
}
}
class TypeScriptScopeHandler extends ScopeHandler {
createScope(flags) {
return new TypeScriptScope(flags);
}
declareName(name, bindingType, loc) {
const scope = this.currentScope();
if (bindingType & BIND_FLAGS_TS_EXPORT_ONLY) {
this.maybeExportDefined(scope, name);
scope.exportOnlyBindings.add(name);
return;
}
super.declareName(...arguments);
if (bindingType & BIND_KIND_TYPE) {
if (!(bindingType & BIND_KIND_VALUE)) {
this.checkRedeclarationInScope(scope, name, bindingType, loc);
this.maybeExportDefined(scope, name);
}
scope.types.add(name);
}
if (bindingType & BIND_FLAGS_TS_ENUM) scope.enums.add(name);
if (bindingType & BIND_FLAGS_TS_CONST_ENUM) scope.constEnums.add(name);
if (bindingType & BIND_FLAGS_CLASS) scope.classes.add(name);
}
isRedeclaredInScope(scope, name, bindingType) {
if (scope.enums.has(name)) {
if (bindingType & BIND_FLAGS_TS_ENUM) {
const isConst = !!(bindingType & BIND_FLAGS_TS_CONST_ENUM);
const wasConst = scope.constEnums.has(name);
return isConst !== wasConst;
}
return true;
}
if (bindingType & BIND_FLAGS_CLASS && scope.classes.has(name)) {
if (scope.lexical.has(name)) {
return !!(bindingType & BIND_KIND_VALUE);
} else {
return false;
}
}
if (bindingType & BIND_KIND_TYPE && scope.types.has(name)) {
return true;
}
return super.isRedeclaredInScope(...arguments);
}
checkLocalExport(id) {
const topLevelScope = this.scopeStack[0];
const { name } = id;
if (
!topLevelScope.types.has(name) &&
!topLevelScope.exportOnlyBindings.has(name)
) {
super.checkLocalExport(id);
}
}
}
const getOwn$1 = (object, key) =>
Object.hasOwnProperty.call(object, key) && object[key];
function nonNull(x) {
if (x == null) {
throw new Error(`Unexpected ${x} value.`);
}
return x;
}
function assert(x) {
if (!x) {
throw new Error('Assert fail');
}
}
function tsTokenCanStartExpression(token) {
return tokenCanStartExpression(token) || tokenIsBinaryOperator(token);
}
const TSErrors = ParseErrorEnum`typescript`((_) => ({
AbstractMethodHasImplementation: _(
({ methodName }) =>
`Method '${methodName}' cannot have an implementation because it is marked abstract.`
),
AbstractPropertyHasInitializer: _(
({ propertyName }) =>
`Property '${propertyName}' cannot have an initializer because it is marked abstract.`
),
AccesorCannotDeclareThisParameter: _(
"'get' and 'set' accessors cannot declare 'this' parameters."
),
AccesorCannotHaveTypeParameters: _(
'An accessor cannot have type parameters.'
),
CannotFindName: _(({ name }) => `Cannot find name '${name}'.`),
ClassMethodHasDeclare: _("Class methods cannot have the 'declare' modifier."),
ClassMethodHasReadonly: _(
"Class methods cannot have the 'readonly' modifier."
),
ConstInitiailizerMustBeStringOrNumericLiteralOrLiteralEnumReference: _(
"A 'const' initializer in an ambient context must be a string or numeric literal or literal enum reference."
),
ConstructorHasTypeParameters: _(
'Type parameters cannot appear on a constructor declaration.'
),
DeclareAccessor: _(({ kind }) => `'declare' is not allowed in ${kind}ters.`),
DeclareClassFieldHasInitializer: _(
'Initializers are not allowed in ambient contexts.'
),
DeclareFunctionHasImplementation: _(
'An implementation cannot be declared in ambient contexts.'
),
DuplicateAccessibilityModifier: _(
({ modifier }) => `Accessibility modifier already seen.`
),
DuplicateModifier: _(({ modifier }) => `Duplicate modifier: '${modifier}'.`),
EmptyHeritageClauseType: _(({ token }) => `'${token}' list cannot be empty.`),
EmptyTypeArguments: _('Type argument list cannot be empty.'),
EmptyTypeParameters: _('Type parameter list cannot be empty.'),
ExpectedAmbientAfterExportDeclare: _(
"'export declare' must be followed by an ambient declaration."
),
ImportAliasHasImportType: _("An import alias can not use 'import type'."),
IncompatibleModifiers: _(
({ modifiers }) =>
`'${modifiers[0]}' modifier cannot be used with '${modifiers[1]}' modifier.`
),
IndexSignatureHasAbstract: _(
"Index signatures cannot have the 'abstract' modifier."
),
IndexSignatureHasAccessibility: _(
({ modifier }) =>
`Index signatures cannot have an accessibility modifier ('${modifier}').`
),
IndexSignatureHasDeclare: _(
"Index signatures cannot have the 'declare' modifier."
),
IndexSignatureHasOverride: _(
"'override' modifier cannot appear on an index signature."
),
IndexSignatureHasStatic: _(
"Index signatures cannot have the 'static' modifier."
),
InitializerNotAllowedInAmbientContext: _(
'Initializers are not allowed in ambient contexts.'
),
InvalidModifierOnTypeMember: _(
({ modifier }) => `'${modifier}' modifier cannot appear on a type member.`
),
InvalidModifierOnTypeParameter: _(
({ modifier }) =>
`'${modifier}' modifier cannot appear on a type parameter.`
),
InvalidModifierOnTypeParameterPositions: _(
({ modifier }) =>
`'${modifier}' modifier can only appear on a type parameter of a class, interface or type alias.`
),
InvalidModifiersOrder: _(
({ orderedModifiers }) =>
`'${orderedModifiers[0]}' modifier must precede '${orderedModifiers[1]}' modifier.`
),
InvalidTupleMemberLabel: _(
'Tuple members must be labeled with a simple identifier.'
),
MissingInterfaceName: _(
"'interface' declarations must be followed by an identifier."
),
MixedLabeledAndUnlabeledElements: _(
'Tuple members must all have names or all not have names.'
),
NonAbstractClassHasAbstractMethod: _(
'Abstract methods can only appear within an abstract class.'
),
NonClassMethodPropertyHasAbstractModifer: _(
"'abstract' modifier can only appear on a class, method, or property declaration."
),
OptionalTypeBeforeRequired: _(
'A required element cannot follow an optional element.'
),
OverrideNotInSubClass: _(
"This member cannot have an 'override' modifier because its containing class does not extend another class."
),
PatternIsOptional: _(
'A binding pattern parameter cannot be optional in an implementation signature.'
),
PrivateElementHasAbstract: _(
"Private elements cannot have the 'abstract' modifier."
),
PrivateElementHasAccessibility: _(
({ modifier }) =>
`Private elements cannot have an accessibility modifier ('${modifier}').`
),
ReadonlyForMethodSignature: _(
"'readonly' modifier can only appear on a property declaration or index signature."
),
ReservedArrowTypeParam: _(
'This syntax is reserved in files with the .mts or .cts extension. Add a trailing comma, as in `<T,>() => ...`.'
),
ReservedTypeAssertion: _(
'This syntax is reserved in files with the .mts or .cts extension. Use an `as` expression instead.'
),
SetAccesorCannotHaveOptionalParameter: _(
"A 'set' accessor cannot have an optional parameter."
),
SetAccesorCannotHaveRestParameter: _(
"A 'set' accessor cannot have rest parameter."
),
SetAccesorCannotHaveReturnType: _(
"A 'set' accessor cannot have a return type annotation."
),
SingleTypeParameterWithoutTrailingComma: _(
({ typeParameterName }) =>
`Single type parameter ${typeParameterName} should have a trailing comma. Example usage: <${typeParameterName},>.`
),
StaticBlockCannotHaveModifier: _(
'Static class blocks cannot have any modifier.'
),
TypeAnnotationAfterAssign: _(
'Type annotations must come before default assignments, e.g. instead of `age = 25: number` use `age: number = 25`.'
),
TypeImportCannotSpecifyDefaultAndNamed: _(
'A type-only import can specify a default import or named bindings, but not both.'
),
TypeModifierIsUsedInTypeExports: _(
"The 'type' modifier cannot be used on a named export when 'export type' is used on its export statement."
),
TypeModifierIsUsedInTypeImports: _(
"The 'type' modifier cannot be used on a named import when 'import type' is used on its import statement."
),
UnexpectedParameterModifier: _(
'A parameter property is only allowed in a constructor implementation.'
),
UnexpectedReadonly: _(
"'readonly' type modifier is only permitted on array and tuple literal types."
),
UnexpectedTypeAnnotation: _('Did not expect a type annotation here.'),
UnexpectedTypeCastInParameter: _(
'Unexpected type cast in parameter position.'
),
UnsupportedImportTypeArgument: _(
'Argument in a type import must be a string literal.'
),
UnsupportedParameterPropertyKind: _(
'A parameter property may not be declared using a binding pattern.'
),
UnsupportedSignatureParameterKind: _(
({ type }) =>
`Name in a signature must be an Identifier, ObjectPattern or ArrayPattern, instead got ${type}.`
),
}));
function keywordTypeFromName(value) {
switch (value) {
case 'any':
return 'TSAnyKeyword';
case 'boolean':
return 'TSBooleanKeyword';
case 'bigint':
return 'TSBigIntKeyword';
case 'never':
return 'TSNeverKeyword';
case 'number':
return 'TSNumberKeyword';
case 'object':
return 'TSObjectKeyword';
case 'string':
return 'TSStringKeyword';
case 'symbol':
return 'TSSymbolKeyword';
case 'undefined':
return 'TSUndefinedKeyword';
case 'unknown':
return 'TSUnknownKeyword';
default:
return undefined;
}
}
function tsIsAccessModifier(modifier) {
return (
modifier === 'private' || modifier === 'public' || modifier === 'protected'
);
}
function tsIsVarianceAnnotations(modifier) {
return modifier === 'in' || modifier === 'out';
}
var typescript = (superClass) =>
class extends superClass {
getScopeHandler() {
return TypeScriptScopeHandler;
}
tsIsIdentifier() {
return tokenIsIdentifier(this.state.type);
}
tsTokenCanFollowModifier() {
return (
(this.match(0) ||
this.match(5) ||
this.match(55) ||
this.match(21) ||
this.match(134) ||
this.isLiteralPropertyName()) &&
!this.hasPrecedingLineBreak()
);
}
tsNextTokenCanFollowModifier() {
this.next();
return this.tsTokenCanFollowModifier();
}
tsParseModifier(allowedModifiers, stopOnStartOfClassStaticBlock) {
if (!tokenIsIdentifier(this.state.type) && this.state.type !== 58) {
return undefined;
}
const modifier = this.state.value;
if (allowedModifiers.indexOf(modifier) !== -1) {
if (stopOnStartOfClassStaticBlock && this.tsIsStartOfStaticBlocks()) {
return undefined;
}
if (this.tsTryParse(this.tsNextTokenCanFollowModifier.bind(this))) {
return modifier;
}
}
return undefined;
}
tsParseModifiers({
modified,
allowedModifiers,
disallowedModifiers,
stopOnStartOfClassStaticBlock,
errorTemplate = TSErrors.InvalidModifierOnTypeMember,
}) {
const enforceOrder = (loc, modifier, before, after) => {
if (modifier === before && modified[after]) {
this.raise(TSErrors.InvalidModifiersOrder, {
at: loc,
orderedModifiers: [before, after],
});
}
};
const incompatible = (loc, modifier, mod1, mod2) => {
if (
(modified[mod1] && modifier === mod2) ||
(modified[mod2] && modifier === mod1)
) {
this.raise(TSErrors.IncompatibleModifiers, {
at: loc,
modifiers: [mod1, mod2],
});
}
};
for (;;) {
const { startLoc } = this.state;
const modifier = this.tsParseModifier(
allowedModifiers.concat(
disallowedModifiers != null ? disallowedModifiers : []
),
stopOnStartOfClassStaticBlock
);
if (!modifier) break;
if (tsIsAccessModifier(modifier)) {
if (modified.accessibility) {
this.raise(TSErrors.DuplicateAccessibilityModifier, {
at: startLoc,
modifier,
});
} else {
enforceOrder(startLoc, modifier, modifier, 'override');
enforceOrder(startLoc, modifier, modifier, 'static');
enforceOrder(startLoc, modifier, modifier, 'readonly');
modified.accessibility = modifier;
}
} else if (tsIsVarianceAnnotations(modifier)) {
if (modified[modifier]) {
this.raise(TSErrors.DuplicateModifier, {
at: startLoc,
modifier,
});
}
modified[modifier] = true;
enforceOrder(startLoc, modifier, 'in', 'out');
} else {
if (Object.hasOwnProperty.call(modified, modifier)) {
this.raise(TSErrors.DuplicateModifier, {
at: startLoc,
modifier,
});
} else {
enforceOrder(startLoc, modifier, 'static', 'readonly');
enforceOrder(startLoc, modifier, 'static', 'override');
enforceOrder(startLoc, modifier, 'override', 'readonly');
enforceOrder(startLoc, modifier, 'abstract', 'override');
incompatible(startLoc, modifier, 'declare', 'override');
incompatible(startLoc, modifier, 'static', 'abstract');
}
modified[modifier] = true;
}
if (
disallowedModifiers != null &&
disallowedModifiers.includes(modifier)
) {
this.raise(errorTemplate, {
at: startLoc,
modifier,
});
}
}
}
tsIsListTerminator(kind) {
switch (kind) {
case 'EnumMembers':
case 'TypeMembers':
return this.match(8);
case 'HeritageClauseElement':
return this.match(5);
case 'TupleElementTypes':
return this.match(3);
case 'TypeParametersOrArguments':
return this.match(48);
}
throw new Error('Unreachable');
}
tsParseList(kind, parseElement) {
const result = [];
while (!this.tsIsListTerminator(kind)) {
result.push(parseElement());
}
return result;
}
tsParseDelimitedList(kind, parseElement, refTrailingCommaPos) {
return nonNull(
this.tsParseDelimitedListWorker(
kind,
parseElement,
true,
refTrailingCommaPos
)
);
}
tsParseDelimitedListWorker(
kind,
parseElement,
expectSuccess,
refTrailingCommaPos
) {
const result = [];
let trailingCommaPos = -1;
for (;;) {
if (this.tsIsListTerminator(kind)) {
break;
}
trailingCommaPos = -1;
const element = parseElement();
if (element == null) {
return undefined;
}
result.push(element);
if (this.eat(12)) {
trailingCommaPos = this.state.lastTokStart;
continue;
}
if (this.tsIsListTerminator(kind)) {
break;
}
if (expectSuccess) {
this.expect(12);
}
return undefined;
}
if (refTrailingCommaPos) {
refTrailingCommaPos.value = trailingCommaPos;
}
return result;
}
tsParseBracketedList(
kind,
parseElement,
bracket,
skipFirstToken,
refTrailingCommaPos
) {
if (!skipFirstToken) {
if (bracket) {
this.expect(0);
} else {
this.expect(47);
}
}
const result = this.tsParseDelimitedList(
kind,
parseElement,
refTrailingCommaPos
);
if (bracket) {
this.expect(3);
} else {
this.expect(48);
}
return result;
}
tsParseImportType() {
const node = this.startNode();
this.expect(83);
this.expect(10);
if (!this.match(129)) {
this.raise(TSErrors.UnsupportedImportTypeArgument, {
at: this.state.startLoc,
});
}
node.argument = this.parseExprAtom();
this.expect(11);
if (this.eat(16)) {
node.qualifier = this.tsParseEntityName();
}
if (this.match(47)) {
node.typeParameters = this.tsParseTypeArguments();
}
return this.finishNode(node, 'TSImportType');
}
tsParseEntityName(allowReservedWords = true) {
let entity = this.parseIdentifier(allowReservedWords);
while (this.eat(16)) {
const node = this.startNodeAtNode(entity);
node.left = entity;
node.right = this.parseIdentifier(allowReservedWords);
entity = this.finishNode(node, 'TSQualifiedName');
}
return entity;
}
tsParseTypeReference() {
const node = this.startNode();
node.typeName = this.tsParseEntityName();
if (!this.hasPrecedingLineBreak() && this.match(47)) {
node.typeParameters = this.tsParseTypeArguments();
}
return this.finishNode(node, 'TSTypeReference');
}
tsParseThisTypePredicate(lhs) {
this.next();
const node = this.startNodeAtNode(lhs);
node.parameterName = lhs;
node.typeAnnotation = this.tsParseTypeAnnotation(false);
node.asserts = false;
return this.finishNode(node, 'TSTypePredicate');
}
tsParseThisTypeNode() {
const node = this.startNode();
this.next();
return this.finishNode(node, 'TSThisType');
}
tsParseTypeQuery() {
const node = this.startNode();
this.expect(87);
if (this.match(83)) {
node.exprName = this.tsParseImportType();
} else {
node.exprName = this.tsParseEntityName();
}
if (!this.hasPrecedingLineBreak() && this.match(47)) {
node.typeParameters = this.tsParseTypeArguments();
}
return this.finishNode(node, 'TSTypeQuery');
}
tsParseInOutModifiers(node) {
this.tsParseModifiers({
modified: node,
allowedModifiers: ['in', 'out'],
disallowedModifiers: [
'public',
'private',
'protected',
'readonly',
'declare',
'abstract',
'override',
],
errorTemplate: TSErrors.InvalidModifierOnTypeParameter,
});
}
tsParseNoneModifiers(node) {
this.tsParseModifiers({
modified: node,
allowedModifiers: [],
disallowedModifiers: ['in', 'out'],
errorTemplate: TSErrors.InvalidModifierOnTypeParameterPositions,
});
}
tsParseTypeParameter(
parseModifiers = this.tsParseNoneModifiers.bind(this)
) {
const node = this.startNode();
parseModifiers(node);
node.name = this.tsParseTypeParameterName();
node.constraint = this.tsEatThenParseType(81);
node.default = this.tsEatThenParseType(29);
return this.finishNode(node, 'TSTypeParameter');
}
tsTryParseTypeParameters(parseModifiers) {
if (this.match(47)) {
return this.tsParseTypeParameters(parseModifiers);
}
}
tsParseTypeParameters(parseModifiers) {
const node = this.startNode();
if (this.match(47) || this.match(138)) {
this.next();
} else {
this.unexpected();
}
const refTrailingCommaPos = {
value: -1,
};
node.params = this.tsParseBracketedList(
'TypeParametersOrArguments',
this.tsParseTypeParameter.bind(this, parseModifiers),
false,
true,
refTrailingCommaPos
);
if (node.params.length === 0) {
this.raise(TSErrors.EmptyTypeParameters, {
at: node,
});
}
if (refTrailingCommaPos.value !== -1) {
this.addExtra(node, 'trailingComma', refTrailingCommaPos.value);
}
return this.finishNode(node, 'TSTypeParameterDeclaration');
}
tsTryNextParseConstantContext() {
if (this.lookahead().type !== 75) return null;
this.next();
const typeReference = this.tsParseTypeReference();
if (typeReference.typeParameters) {
this.raise(TSErrors.CannotFindName, {
at: typeReference.typeName,
name: 'const',
});
}
return typeReference;
}
tsFillSignature(returnToken, signature) {
const returnTokenRequired = returnToken === 19;
const paramsKey = 'parameters';
const returnTypeKey = 'typeAnnotation';
signature.typeParameters = this.tsTryParseTypeParameters();
this.expect(10);
signature[paramsKey] = this.tsParseBindingListForSignature();
if (returnTokenRequired) {
signature[returnTypeKey] =
this.tsParseTypeOrTypePredicateAnnotation(returnToken);
} else if (this.match(returnToken)) {
signature[returnTypeKey] =
this.tsParseTypeOrTypePredicateAnnotation(returnToken);
}
}
tsParseBindingListForSignature() {
return this.parseBindingList(11, 41).map((pattern) => {
if (
pattern.type !== 'Identifier' &&
pattern.type !== 'RestElement' &&
pattern.type !== 'ObjectPattern' &&
pattern.type !== 'ArrayPattern'
) {
this.raise(TSErrors.UnsupportedSignatureParameterKind, {
at: pattern,
type: pattern.type,
});
}
return pattern;
});
}
tsParseTypeMemberSemicolon() {
if (!this.eat(12) && !this.isLineTerminator()) {
this.expect(13);
}
}
tsParseSignatureMember(kind, node) {
this.tsFillSignature(14, node);
this.tsParseTypeMemberSemicolon();
return this.finishNode(node, kind);
}
tsIsUnambiguouslyIndexSignature() {
this.next();
if (tokenIsIdentifier(this.state.type)) {
this.next();
return this.match(14);
}
return false;
}
tsTryParseIndexSignature(node) {
if (
!(
this.match(0) &&
this.tsLookAhead(this.tsIsUnambiguouslyIndexSignature.bind(this))
)
) {
return undefined;
}
this.expect(0);
const id = this.parseIdentifier();
id.typeAnnotation = this.tsParseTypeAnnotation();
this.resetEndLocation(id);
this.expect(3);
node.parameters = [id];
const type = this.tsTryParseTypeAnnotation();
if (type) node.typeAnnotation = type;
this.tsParseTypeMemberSemicolon();
return this.finishNode(node, 'TSIndexSignature');
}
tsParsePropertyOrMethodSignature(node, readonly) {
if (this.eat(17)) node.optional = true;
const nodeAny = node;
if (this.match(10) || this.match(47)) {
if (readonly) {
this.raise(TSErrors.ReadonlyForMethodSignature, {
at: node,
});
}
const method = nodeAny;
if (method.kind && this.match(47)) {
this.raise(TSErrors.AccesorCannotHaveTypeParameters, {
at: this.state.curPosition(),
});
}
this.tsFillSignature(14, method);
this.tsParseTypeMemberSemicolon();
const paramsKey = 'parameters';
const returnTypeKey = 'typeAnnotation';
if (method.kind === 'get') {
if (method[paramsKey].length > 0) {
this.raise(Errors.BadGetterArity, {
at: this.state.curPosition(),
});
if (this.isThisParam(method[paramsKey][0])) {
this.raise(TSErrors.AccesorCannotDeclareThisParameter, {
at: this.state.curPosition(),
});
}
}
} else if (method.kind === 'set') {
if (method[paramsKey].length !== 1) {
this.raise(Errors.BadSetterArity, {
at: this.state.curPosition(),
});
} else {
const firstParameter = method[paramsKey][0];
if (this.isThisParam(firstParameter)) {
this.raise(TSErrors.AccesorCannotDeclareThisParameter, {
at: this.state.curPosition(),
});
}
if (
firstParameter.type === 'Identifier' &&
firstParameter.optional
) {
this.raise(TSErrors.SetAccesorCannotHaveOptionalParameter, {
at: this.state.curPosition(),
});
}
if (firstParameter.type === 'RestElement') {
this.raise(TSErrors.SetAccesorCannotHaveRestParameter, {
at: this.state.curPosition(),
});
}
}
if (method[returnTypeKey]) {
this.raise(TSErrors.SetAccesorCannotHaveReturnType, {
at: method[returnTypeKey],
});
}
} else {
method.kind = 'method';
}
return this.finishNode(method, 'TSMethodSignature');
} else {
const property = nodeAny;
if (readonly) property.readonly = true;
const type = this.tsTryParseTypeAnnotation();
if (type) property.typeAnnotation = type;
this.tsParseTypeMemberSemicolon();
return this.finishNode(property, 'TSPropertySignature');
}
}
tsParseTypeMember() {
const node = this.startNode();
if (this.match(10) || this.match(47)) {
return this.tsParseSignatureMember('TSCallSignatureDeclaration', node);
}
if (this.match(77)) {
const id = this.startNode();
this.next();
if (this.match(10) || this.match(47)) {
return this.tsParseSignatureMember(
'TSConstructSignatureDeclaration',
node
);
} else {
node.key = this.createIdentifier(id, 'new');
return this.tsParsePropertyOrMethodSignature(node, false);
}
}
this.tsParseModifiers({
modified: node,
allowedModifiers: ['readonly'],
disallowedModifiers: [
'declare',
'abstract',
'private',
'protected',
'public',
'static',
'override',
],
});
const idx = this.tsTryParseIndexSignature(node);
if (idx) {
return idx;
}
this.parsePropertyName(node);
if (
!node.computed &&
node.key.type === 'Identifier' &&
(node.key.name === 'get' || node.key.name === 'set') &&
this.tsTokenCanFollowModifier()
) {
node.kind = node.key.name;
this.parsePropertyName(node);
}
return this.tsParsePropertyOrMethodSignature(node, !!node.readonly);
}
tsParseTypeLiteral() {
const node = this.startNode();
node.members = this.tsParseObjectTypeMembers();
return this.finishNode(node, 'TSTypeLiteral');
}
tsParseObjectTypeMembers() {
this.expect(5);
const members = this.tsParseList(
'TypeMembers',
this.tsParseTypeMember.bind(this)
);
this.expect(8);
return members;
}
tsIsStartOfMappedType() {
this.next();
if (this.eat(53)) {
return this.isContextual(118);
}
if (this.isContextual(118)) {
this.next();
}
if (!this.match(0)) {
return false;
}
this.next();
if (!this.tsIsIdentifier()) {
return false;
}
this.next();
return this.match(58);
}
tsParseMappedTypeParameter() {
const node = this.startNode();
node.name = this.tsParseTypeParameterName();
node.constraint = this.tsExpectThenParseType(58);
return this.finishNode(node, 'TSTypeParameter');
}
tsParseMappedType() {
const node = this.startNode();
this.expect(5);
if (this.match(53)) {
node.readonly = this.state.value;
this.next();
this.expectContextual(118);
} else if (this.eatContextual(118)) {
node.readonly = true;
}
this.expect(0);
node.typeParameter = this.tsParseMappedTypeParameter();
node.nameType = this.eatContextual(93) ? this.tsParseType() : null;
this.expect(3);
if (this.match(53)) {
node.optional = this.state.value;
this.next();
this.expect(17);
} else if (this.eat(17)) {
node.optional = true;
}
node.typeAnnotation = this.tsTryParseType();
this.semicolon();
this.expect(8);
return this.finishNode(node, 'TSMappedType');
}
tsParseTupleType() {
const node = this.startNode();
node.elementTypes = this.tsParseBracketedList(
'TupleElementTypes',
this.tsParseTupleElementType.bind(this),
true,
false
);
let seenOptionalElement = false;
let labeledElements = null;
node.elementTypes.forEach((elementNode) => {
var _labeledElements;
let { type } = elementNode;
if (
seenOptionalElement &&
type !== 'TSRestType' &&
type !== 'TSOptionalType' &&
!(type === 'TSNamedTupleMember' && elementNode.optional)
) {
this.raise(TSErrors.OptionalTypeBeforeRequired, {
at: elementNode,
});
}
seenOptionalElement =
seenOptionalElement ||
(type === 'TSNamedTupleMember' && elementNode.optional) ||
type === 'TSOptionalType';
if (type === 'TSRestType') {
elementNode = elementNode.typeAnnotation;
type = elementNode.type;
}
const isLabeled = type === 'TSNamedTupleMember';
labeledElements =
(_labeledElements = labeledElements) != null ?
_labeledElements
: isLabeled;
if (labeledElements !== isLabeled) {
this.raise(TSErrors.MixedLabeledAndUnlabeledElements, {
at: elementNode,
});
}
});
return this.finishNode(node, 'TSTupleType');
}
tsParseTupleElementType() {
const { start: startPos, startLoc } = this.state;
const rest = this.eat(21);
let type = this.tsParseType();
const optional = this.eat(17);
const labeled = this.eat(14);
if (labeled) {
const labeledNode = this.startNodeAtNode(type);
labeledNode.optional = optional;
if (
type.type === 'TSTypeReference' &&
!type.typeParameters &&
type.typeName.type === 'Identifier'
) {
labeledNode.label = type.typeName;
} else {
this.raise(TSErrors.InvalidTupleMemberLabel, {
at: type,
});
labeledNode.label = type;
}
labeledNode.elementType = this.tsParseType();
type = this.finishNode(labeledNode, 'TSNamedTupleMember');
} else if (optional) {
const optionalTypeNode = this.startNodeAtNode(type);
optionalTypeNode.typeAnnotation = type;
type = this.finishNode(optionalTypeNode, 'TSOptionalType');
}
if (rest) {
const restNode = this.startNodeAt(startPos, startLoc);
restNode.typeAnnotation = type;
type = this.finishNode(restNode, 'TSRestType');
}
return type;
}
tsParseParenthesizedType() {
const node = this.startNode();
this.expect(10);
node.typeAnnotation = this.tsParseType();
this.expect(11);
return this.finishNode(node, 'TSParenthesizedType');
}
tsParseFunctionOrConstructorType(type, abstract) {
const node = this.startNode();
if (type === 'TSConstructorType') {
node.abstract = !!abstract;
if (abstract) this.next();
this.next();
}
this.tsInAllowConditionalTypesContext(() =>
this.tsFillSignature(19, node)
);
return this.finishNode(node, type);
}
tsParseLiteralTypeNode() {
const node = this.startNode();
node.literal = (() => {
switch (this.state.type) {
case 130:
case 131:
case 129:
case 85:
case 86:
return this.parseExprAtom();
default:
throw this.unexpected();
}
})();
return this.finishNode(node, 'TSLiteralType');
}
tsParseTemplateLiteralType() {
const node = this.startNode();
node.literal = this.parseTemplate(false);
return this.finishNode(node, 'TSLiteralType');
}
parseTemplateSubstitution() {
if (this.state.inType) return this.tsParseType();
return super.parseTemplateSubstitution();
}
tsParseThisTypeOrThisTypePredicate() {
const thisKeyword = this.tsParseThisTypeNode();
if (this.isContextual(113) && !this.hasPrecedingLineBreak()) {
return this.tsParseThisTypePredicate(thisKeyword);
} else {
return thisKeyword;
}
}
tsParseNonArrayType() {
switch (this.state.type) {
case 129:
case 130:
case 131:
case 85:
case 86:
return this.tsParseLiteralTypeNode();
case 53:
if (this.state.value === '-') {
const node = this.startNode();
const nextToken = this.lookahead();
if (nextToken.type !== 130 && nextToken.type !== 131) {
throw this.unexpected();
}
node.literal = this.parseMaybeUnary();
return this.finishNode(node, 'TSLiteralType');
}
break;
case 78:
return this.tsParseThisTypeOrThisTypePredicate();
case 87:
return this.tsParseTypeQuery();
case 83:
return this.tsParseImportType();
case 5:
return this.tsLookAhead(this.tsIsStartOfMappedType.bind(this)) ?
this.tsParseMappedType()
: this.tsParseTypeLiteral();
case 0:
return this.tsParseTupleType();
case 10:
return this.tsParseParenthesizedType();
case 25:
case 24:
return this.tsParseTemplateLiteralType();
default: {
const { type } = this.state;
if (tokenIsIdentifier(type) || type === 88 || type === 84) {
const nodeType =
type === 88 ? 'TSVoidKeyword'
: type === 84 ? 'TSNullKeyword'
: keywordTypeFromName(this.state.value);
if (nodeType !== undefined && this.lookaheadCharCode() !== 46) {
const node = this.startNode();
this.next();
return this.finishNode(node, nodeType);
}
return this.tsParseTypeReference();
}
}
}
throw this.unexpected();
}
tsParseArrayTypeOrHigher() {
let type = this.tsParseNonArrayType();
while (!this.hasPrecedingLineBreak() && this.eat(0)) {
if (this.match(3)) {
const node = this.startNodeAtNode(type);
node.elementType = type;
this.expect(3);
type = this.finishNode(node, 'TSArrayType');
} else {
const node = this.startNodeAtNode(type);
node.objectType = type;
node.indexType = this.tsParseType();
this.expect(3);
type = this.finishNode(node, 'TSIndexedAccessType');
}
}
return type;
}
tsParseTypeOperator() {
const node = this.startNode();
const operator = this.state.value;
this.next();
node.operator = operator;
node.typeAnnotation = this.tsParseTypeOperatorOrHigher();
if (operator === 'readonly') {
this.tsCheckTypeAnnotationForReadOnly(node);
}
return this.finishNode(node, 'TSTypeOperator');
}
tsCheckTypeAnnotationForReadOnly(node) {
switch (node.typeAnnotation.type) {
case 'TSTupleType':
case 'TSArrayType':
return;
default:
this.raise(TSErrors.UnexpectedReadonly, {
at: node,
});
}
}
tsParseInferType() {
const node = this.startNode();
this.expectContextual(112);
const typeParameter = this.startNode();
typeParameter.name = this.tsParseTypeParameterName();
typeParameter.constraint = this.tsTryParse(() =>
this.tsParseConstraintForInferType()
);
node.typeParameter = this.finishNode(typeParameter, 'TSTypeParameter');
return this.finishNode(node, 'TSInferType');
}
tsParseConstraintForInferType() {
if (this.eat(81)) {
const constraint = this.tsInDisallowConditionalTypesContext(() =>
this.tsParseType()
);
if (this.state.inDisallowConditionalTypesContext || !this.match(17)) {
return constraint;
}
}
}
tsParseTypeOperatorOrHigher() {
const isTypeOperator =
tokenIsTSTypeOperator(this.state.type) && !this.state.containsEsc;
return (
isTypeOperator ? this.tsParseTypeOperator()
: this.isContextual(112) ? this.tsParseInferType()
: this.tsInAllowConditionalTypesContext(() =>
this.tsParseArrayTypeOrHigher()
)
);
}
tsParseUnionOrIntersectionType(kind, parseConstituentType, operator) {
const node = this.startNode();
const hasLeadingOperator = this.eat(operator);
const types = [];
do {
types.push(parseConstituentType());
} while (this.eat(operator));
if (types.length === 1 && !hasLeadingOperator) {
return types[0];
}
node.types = types;
return this.finishNode(node, kind);
}
tsParseIntersectionTypeOrHigher() {
return this.tsParseUnionOrIntersectionType(
'TSIntersectionType',
this.tsParseTypeOperatorOrHigher.bind(this),
45
);
}
tsParseUnionTypeOrHigher() {
return this.tsParseUnionOrIntersectionType(
'TSUnionType',
this.tsParseIntersectionTypeOrHigher.bind(this),
43
);
}
tsIsStartOfFunctionType() {
if (this.match(47)) {
return true;
}
return (
this.match(10) &&
this.tsLookAhead(this.tsIsUnambiguouslyStartOfFunctionType.bind(this))
);
}
tsSkipParameterStart() {
if (tokenIsIdentifier(this.state.type) || this.match(78)) {
this.next();
return true;
}
if (this.match(5)) {
const { errors } = this.state;
const previousErrorCount = errors.length;
try {
this.parseObjectLike(8, true);
return errors.length === previousErrorCount;
} catch (_unused) {
return false;
}
}
if (this.match(0)) {
this.next();
const { errors } = this.state;
const previousErrorCount = errors.length;
try {
this.parseBindingList(3, 93, true);
return errors.length === previousErrorCount;
} catch (_unused2) {
return false;
}
}
return false;
}
tsIsUnambiguouslyStartOfFunctionType() {
this.next();
if (this.match(11) || this.match(21)) {
return true;
}
if (this.tsSkipParameterStart()) {
if (
this.match(14) ||
this.match(12) ||
this.match(17) ||
this.match(29)
) {
return true;
}
if (this.match(11)) {
this.next();
if (this.match(19)) {
return true;
}
}
}
return false;
}
tsParseTypeOrTypePredicateAnnotation(returnToken) {
return this.tsInType(() => {
const t = this.startNode();
this.expect(returnToken);
const node = this.startNode();
const asserts = !!this.tsTryParse(
this.tsParseTypePredicateAsserts.bind(this)
);
if (asserts && this.match(78)) {
let thisTypePredicate = this.tsParseThisTypeOrThisTypePredicate();
if (thisTypePredicate.type === 'TSThisType') {
node.parameterName = thisTypePredicate;
node.asserts = true;
node.typeAnnotation = null;
thisTypePredicate = this.finishNode(node, 'TSTypePredicate');
} else {
this.resetStartLocationFromNode(thisTypePredicate, node);
thisTypePredicate.asserts = true;
}
t.typeAnnotation = thisTypePredicate;
return this.finishNode(t, 'TSTypeAnnotation');
}
const typePredicateVariable =
this.tsIsIdentifier() &&
this.tsTryParse(this.tsParseTypePredicatePrefix.bind(this));
if (!typePredicateVariable) {
if (!asserts) {
return this.tsParseTypeAnnotation(false, t);
}
node.parameterName = this.parseIdentifier();
node.asserts = asserts;
node.typeAnnotation = null;
t.typeAnnotation = this.finishNode(node, 'TSTypePredicate');
return this.finishNode(t, 'TSTypeAnnotation');
}
const type = this.tsParseTypeAnnotation(false);
node.parameterName = typePredicateVariable;
node.typeAnnotation = type;
node.asserts = asserts;
t.typeAnnotation = this.finishNode(node, 'TSTypePredicate');
return this.finishNode(t, 'TSTypeAnnotation');
});
}
tsTryParseTypeOrTypePredicateAnnotation() {
return this.match(14) ?
this.tsParseTypeOrTypePredicateAnnotation(14)
: undefined;
}
tsTryParseTypeAnnotation() {
return this.match(14) ? this.tsParseTypeAnnotation() : undefined;
}
tsTryParseType() {
return this.tsEatThenParseType(14);
}
tsParseTypePredicatePrefix() {
const id = this.parseIdentifier();
if (this.isContextual(113) && !this.hasPrecedingLineBreak()) {
this.next();
return id;
}
}
tsParseTypePredicateAsserts() {
if (this.state.type !== 106) {
return false;
}
const containsEsc = this.state.containsEsc;
this.next();
if (!tokenIsIdentifier(this.state.type) && !this.match(78)) {
return false;
}
if (containsEsc) {
this.raise(Errors.InvalidEscapedReservedWord, {
at: this.state.lastTokStartLoc,
reservedWord: 'asserts',
});
}
return true;
}
tsParseTypeAnnotation(eatColon = true, t = this.startNode()) {
this.tsInType(() => {
if (eatColon) this.expect(14);
t.typeAnnotation = this.tsParseType();
});
return this.finishNode(t, 'TSTypeAnnotation');
}
tsParseType() {
assert(this.state.inType);
const type = this.tsParseNonConditionalType();
if (
this.state.inDisallowConditionalTypesContext ||
this.hasPrecedingLineBreak() ||
!this.eat(81)
) {
return type;
}
const node = this.startNodeAtNode(type);
node.checkType = type;
node.extendsType = this.tsInDisallowConditionalTypesContext(() =>
this.tsParseNonConditionalType()
);
this.expect(17);
node.trueType = this.tsInAllowConditionalTypesContext(() =>
this.tsParseType()
);
this.expect(14);
node.falseType = this.tsInAllowConditionalTypesContext(() =>
this.tsParseType()
);
return this.finishNode(node, 'TSConditionalType');
}
isAbstractConstructorSignature() {
return this.isContextual(120) && this.lookahead().type === 77;
}
tsParseNonConditionalType() {
if (this.tsIsStartOfFunctionType()) {
return this.tsParseFunctionOrConstructorType('TSFunctionType');
}
if (this.match(77)) {
return this.tsParseFunctionOrConstructorType('TSConstructorType');
} else if (this.isAbstractConstructorSignature()) {
return this.tsParseFunctionOrConstructorType('TSConstructorType', true);
}
return this.tsParseUnionTypeOrHigher();
}
tsParseTypeAssertion() {
if (this.getPluginOption('typescript', 'disallowAmbiguousJSXLike')) {
this.raise(TSErrors.ReservedTypeAssertion, {
at: this.state.startLoc,
});
}
const node = this.startNode();
const _const = this.tsTryNextParseConstantContext();
node.typeAnnotation = _const || this.tsNextThenParseType();
this.expect(48);
node.expression = this.parseMaybeUnary();
return this.finishNode(node, 'TSTypeAssertion');
}
tsParseHeritageClause(token) {
const originalStartLoc = this.state.startLoc;
const delimitedList = this.tsParseDelimitedList(
'HeritageClauseElement',
() => {
const node = this.startNode();
node.expression = this.tsParseEntityName();
if (this.match(47)) {
node.typeParameters = this.tsParseTypeArguments();
}
return this.finishNode(node, 'TSExpressionWithTypeArguments');
}
);
if (!delimitedList.length) {
this.raise(TSErrors.EmptyHeritageClauseType, {
at: originalStartLoc,
token,
});
}
return delimitedList;
}
tsParseInterfaceDeclaration(node, properties = {}) {
if (this.hasFollowingLineBreak()) return null;
this.expectContextual(125);
if (properties.declare) node.declare = true;
if (tokenIsIdentifier(this.state.type)) {
node.id = this.parseIdentifier();
this.checkIdentifier(node.id, BIND_TS_INTERFACE);
} else {
node.id = null;
this.raise(TSErrors.MissingInterfaceName, {
at: this.state.startLoc,
});
}
node.typeParameters = this.tsTryParseTypeParameters(
this.tsParseInOutModifiers.bind(this)
);
if (this.eat(81)) {
node.extends = this.tsParseHeritageClause('extends');
}
const body = this.startNode();
body.body = this.tsInType(this.tsParseObjectTypeMembers.bind(this));
node.body = this.finishNode(body, 'TSInterfaceBody');
return this.finishNode(node, 'TSInterfaceDeclaration');
}
tsParseTypeAliasDeclaration(node) {
node.id = this.parseIdentifier();
this.checkIdentifier(node.id, BIND_TS_TYPE);
node.typeAnnotation = this.tsInType(() => {
node.typeParameters = this.tsTryParseTypeParameters(
this.tsParseInOutModifiers.bind(this)
);
this.expect(29);
if (this.isContextual(111) && this.lookahead().type !== 16) {
const node = this.startNode();
this.next();
return this.finishNode(node, 'TSIntrinsicKeyword');
}
return this.tsParseType();
});
this.semicolon();
return this.finishNode(node, 'TSTypeAliasDeclaration');
}
tsInNoContext(cb) {
const oldContext = this.state.context;
this.state.context = [oldContext[0]];
try {
return cb();
} finally {
this.state.context = oldContext;
}
}
tsInType(cb) {
const oldInType = this.state.inType;
this.state.inType = true;
try {
return cb();
} finally {
this.state.inType = oldInType;
}
}
tsInDisallowConditionalTypesContext(cb) {
const oldInDisallowConditionalTypesContext =
this.state.inDisallowConditionalTypesContext;
this.state.inDisallowConditionalTypesContext = true;
try {
return cb();
} finally {
this.state.inDisallowConditionalTypesContext =
oldInDisallowConditionalTypesContext;
}
}
tsInAllowConditionalTypesContext(cb) {
const oldInDisallowConditionalTypesContext =
this.state.inDisallowConditionalTypesContext;
this.state.inDisallowConditionalTypesContext = false;
try {
return cb();
} finally {
this.state.inDisallowConditionalTypesContext =
oldInDisallowConditionalTypesContext;
}
}
tsEatThenParseType(token) {
return !this.match(token) ? undefined : this.tsNextThenParseType();
}
tsExpectThenParseType(token) {
return this.tsDoThenParseType(() => this.expect(token));
}
tsNextThenParseType() {
return this.tsDoThenParseType(() => this.next());
}
tsDoThenParseType(cb) {
return this.tsInType(() => {
cb();
return this.tsParseType();
});
}
tsParseEnumMember() {
const node = this.startNode();
node.id =
this.match(129) ? this.parseExprAtom() : this.parseIdentifier(true);
if (this.eat(29)) {
node.initializer = this.parseMaybeAssignAllowIn();
}
return this.finishNode(node, 'TSEnumMember');
}
tsParseEnumDeclaration(node, properties = {}) {
if (properties.const) node.const = true;
if (properties.declare) node.declare = true;
this.expectContextual(122);
node.id = this.parseIdentifier();
this.checkIdentifier(
node.id,
node.const ? BIND_TS_CONST_ENUM : BIND_TS_ENUM
);
this.expect(5);
node.members = this.tsParseDelimitedList(
'EnumMembers',
this.tsParseEnumMember.bind(this)
);
this.expect(8);
return this.finishNode(node, 'TSEnumDeclaration');
}
tsParseModuleBlock() {
const node = this.startNode();
this.scope.enter(SCOPE_OTHER);
this.expect(5);
this.parseBlockOrModuleBlockBody((node.body = []), undefined, true, 8);
this.scope.exit();
return this.finishNode(node, 'TSModuleBlock');
}
tsParseModuleOrNamespaceDeclaration(node, nested = false) {
node.id = this.parseIdentifier();
if (!nested) {
this.checkIdentifier(node.id, BIND_TS_NAMESPACE);
}
if (this.eat(16)) {
const inner = this.startNode();
this.tsParseModuleOrNamespaceDeclaration(inner, true);
node.body = inner;
} else {
this.scope.enter(SCOPE_TS_MODULE);
this.prodParam.enter(PARAM);
node.body = this.tsParseModuleBlock();
this.prodParam.exit();
this.scope.exit();
}
return this.finishNode(node, 'TSModuleDeclaration');
}
tsParseAmbientExternalModuleDeclaration(node) {
if (this.isContextual(109)) {
node.global = true;
node.id = this.parseIdentifier();
} else if (this.match(129)) {
node.id = this.parseExprAtom();
} else {
this.unexpected();
}
if (this.match(5)) {
this.scope.enter(SCOPE_TS_MODULE);
this.prodParam.enter(PARAM);
node.body = this.tsParseModuleBlock();
this.prodParam.exit();
this.scope.exit();
} else {
this.semicolon();
}
return this.finishNode(node, 'TSModuleDeclaration');
}
tsParseImportEqualsDeclaration(node, isExport) {
node.isExport = isExport || false;
node.id = this.parseIdentifier();
this.checkIdentifier(node.id, BIND_LEXICAL);
this.expect(29);
const moduleReference = this.tsParseModuleReference();
if (
node.importKind === 'type' &&
moduleReference.type !== 'TSExternalModuleReference'
) {
this.raise(TSErrors.ImportAliasHasImportType, {
at: moduleReference,
});
}
node.moduleReference = moduleReference;
this.semicolon();
return this.finishNode(node, 'TSImportEqualsDeclaration');
}
tsIsExternalModuleReference() {
return this.isContextual(116) && this.lookaheadCharCode() === 40;
}
tsParseModuleReference() {
return this.tsIsExternalModuleReference() ?
this.tsParseExternalModuleReference()
: this.tsParseEntityName(false);
}
tsParseExternalModuleReference() {
const node = this.startNode();
this.expectContextual(116);
this.expect(10);
if (!this.match(129)) {
throw this.unexpected();
}
node.expression = this.parseExprAtom();
this.expect(11);
return this.finishNode(node, 'TSExternalModuleReference');
}
tsLookAhead(f) {
const state = this.state.clone();
const res = f();
this.state = state;
return res;
}
tsTryParseAndCatch(f) {
const result = this.tryParse((abort) => f() || abort());
if (result.aborted || !result.node) return undefined;
if (result.error) this.state = result.failState;
return result.node;
}
tsTryParse(f) {
const state = this.state.clone();
const result = f();
if (result !== undefined && result !== false) {
return result;
} else {
this.state = state;
return undefined;
}
}
tsTryParseDeclare(nany) {
if (this.isLineTerminator()) {
return;
}
let starttype = this.state.type;
let kind;
if (this.isContextual(99)) {
starttype = 74;
kind = 'let';
}
return this.tsInAmbientContext(() => {
if (starttype === 68) {
nany.declare = true;
return this.parseFunctionStatement(nany, false, true);
}
if (starttype === 80) {
nany.declare = true;
return this.parseClass(nany, true, false);
}
if (starttype === 122) {
return this.tsParseEnumDeclaration(nany, {
declare: true,
});
}
if (starttype === 109) {
return this.tsParseAmbientExternalModuleDeclaration(nany);
}
if (starttype === 75 || starttype === 74) {
if (!this.match(75) || !this.isLookaheadContextual('enum')) {
nany.declare = true;
return this.parseVarStatement(nany, kind || this.state.value, true);
}
this.expect(75);
return this.tsParseEnumDeclaration(nany, {
const: true,
declare: true,
});
}
if (starttype === 125) {
const result = this.tsParseInterfaceDeclaration(nany, {
declare: true,
});
if (result) return result;
}
if (tokenIsIdentifier(starttype)) {
return this.tsParseDeclaration(nany, this.state.value, true);
}
});
}
tsTryParseExportDeclaration() {
return this.tsParseDeclaration(this.startNode(), this.state.value, true);
}
tsParseExpressionStatement(node, expr) {
switch (expr.name) {
case 'declare': {
const declaration = this.tsTryParseDeclare(node);
if (declaration) {
declaration.declare = true;
return declaration;
}
break;
}
case 'global':
if (this.match(5)) {
this.scope.enter(SCOPE_TS_MODULE);
this.prodParam.enter(PARAM);
const mod = node;
mod.global = true;
mod.id = expr;
mod.body = this.tsParseModuleBlock();
this.scope.exit();
this.prodParam.exit();
return this.finishNode(mod, 'TSModuleDeclaration');
}
break;
default:
return this.tsParseDeclaration(node, expr.name, false);
}
}
tsParseDeclaration(node, value, next) {
switch (value) {
case 'abstract':
if (
this.tsCheckLineTerminator(next) &&
(this.match(80) || tokenIsIdentifier(this.state.type))
) {
return this.tsParseAbstractDeclaration(node);
}
break;
case 'module':
if (this.tsCheckLineTerminator(next)) {
if (this.match(129)) {
return this.tsParseAmbientExternalModuleDeclaration(node);
} else if (tokenIsIdentifier(this.state.type)) {
return this.tsParseModuleOrNamespaceDeclaration(node);
}
}
break;
case 'namespace':
if (
this.tsCheckLineTerminator(next) &&
tokenIsIdentifier(this.state.type)
) {
return this.tsParseModuleOrNamespaceDeclaration(node);
}
break;
case 'type':
if (
this.tsCheckLineTerminator(next) &&
tokenIsIdentifier(this.state.type)
) {
return this.tsParseTypeAliasDeclaration(node);
}
break;
}
}
tsCheckLineTerminator(next) {
if (next) {
if (this.hasFollowingLineBreak()) return false;
this.next();
return true;
}
return !this.isLineTerminator();
}
tsTryParseGenericAsyncArrowFunction(startPos, startLoc) {
if (!this.match(47)) {
return undefined;
}
const oldMaybeInArrowParameters = this.state.maybeInArrowParameters;
this.state.maybeInArrowParameters = true;
const res = this.tsTryParseAndCatch(() => {
const node = this.startNodeAt(startPos, startLoc);
node.typeParameters = this.tsParseTypeParameters();
super.parseFunctionParams(node);
node.returnType = this.tsTryParseTypeOrTypePredicateAnnotation();
this.expect(19);
return node;
});
this.state.maybeInArrowParameters = oldMaybeInArrowParameters;
if (!res) {
return undefined;
}
return this.parseArrowExpression(res, null, true);
}
tsParseTypeArgumentsInExpression() {
if (this.reScan_lt() !== 47) {
return undefined;
}
return this.tsParseTypeArguments();
}
tsParseTypeArguments() {
const node = this.startNode();
node.params = this.tsInType(() =>
this.tsInNoContext(() => {
this.expect(47);
return this.tsParseDelimitedList(
'TypeParametersOrArguments',
this.tsParseType.bind(this)
);
})
);
if (node.params.length === 0) {
this.raise(TSErrors.EmptyTypeArguments, {
at: node,
});
}
this.expect(48);
return this.finishNode(node, 'TSTypeParameterInstantiation');
}
tsIsDeclarationStart() {
return tokenIsTSDeclarationStart(this.state.type);
}
isExportDefaultSpecifier() {
if (this.tsIsDeclarationStart()) return false;
return super.isExportDefaultSpecifier();
}
parseAssignableListItem(allowModifiers, decorators) {
const startPos = this.state.start;
const startLoc = this.state.startLoc;
let accessibility;
let readonly = false;
let override = false;
if (allowModifiers !== undefined) {
const modified = {};
this.tsParseModifiers({
modified,
allowedModifiers: [
'public',
'private',
'protected',
'override',
'readonly',
],
});
accessibility = modified.accessibility;
override = modified.override;
readonly = modified.readonly;
if (
allowModifiers === false &&
(accessibility || readonly || override)
) {
this.raise(TSErrors.UnexpectedParameterModifier, {
at: startLoc,
});
}
}
const left = this.parseMaybeDefault();
this.parseAssignableListItemTypes(left);
const elt = this.parseMaybeDefault(left.start, left.loc.start, left);
if (accessibility || readonly || override) {
const pp = this.startNodeAt(startPos, startLoc);
if (decorators.length) {
pp.decorators = decorators;
}
if (accessibility) pp.accessibility = accessibility;
if (readonly) pp.readonly = readonly;
if (override) pp.override = override;
if (elt.type !== 'Identifier' && elt.type !== 'AssignmentPattern') {
this.raise(TSErrors.UnsupportedParameterPropertyKind, {
at: pp,
});
}
pp.parameter = elt;
return this.finishNode(pp, 'TSParameterProperty');
}
if (decorators.length) {
left.decorators = decorators;
}
return elt;
}
isSimpleParameter(node) {
return (
(node.type === 'TSParameterProperty' &&
super.isSimpleParameter(node.parameter)) ||
super.isSimpleParameter(node)
);
}
parseFunctionBodyAndFinish(node, type, isMethod = false) {
if (this.match(14)) {
node.returnType = this.tsParseTypeOrTypePredicateAnnotation(14);
}
const bodilessType =
type === 'FunctionDeclaration' ? 'TSDeclareFunction'
: type === 'ClassMethod' || type === 'ClassPrivateMethod' ?
'TSDeclareMethod'
: undefined;
if (bodilessType && !this.match(5) && this.isLineTerminator()) {
this.finishNode(node, bodilessType);
return;
}
if (bodilessType === 'TSDeclareFunction' && this.state.isAmbientContext) {
this.raise(TSErrors.DeclareFunctionHasImplementation, {
at: node,
});
if (node.declare) {
super.parseFunctionBodyAndFinish(node, bodilessType, isMethod);
return;
}
}
super.parseFunctionBodyAndFinish(node, type, isMethod);
}
registerFunctionStatementId(node) {
if (!node.body && node.id) {
this.checkIdentifier(node.id, BIND_TS_AMBIENT);
} else {
super.registerFunctionStatementId(...arguments);
}
}
tsCheckForInvalidTypeCasts(items) {
items.forEach((node) => {
if ((node == null ? void 0 : node.type) === 'TSTypeCastExpression') {
this.raise(TSErrors.UnexpectedTypeAnnotation, {
at: node.typeAnnotation,
});
}
});
}
toReferencedList(exprList, isInParens) {
this.tsCheckForInvalidTypeCasts(exprList);
return exprList;
}
parseArrayLike(...args) {
const node = super.parseArrayLike(...args);
if (node.type === 'ArrayExpression') {
this.tsCheckForInvalidTypeCasts(node.elements);
}
return node;
}
parseSubscript(base, startPos, startLoc, noCalls, state) {
if (!this.hasPrecedingLineBreak() && this.match(35)) {
this.state.canStartJSXElement = false;
this.next();
const nonNullExpression = this.startNodeAt(startPos, startLoc);
nonNullExpression.expression = base;
return this.finishNode(nonNullExpression, 'TSNonNullExpression');
}
let isOptionalCall = false;
if (this.match(18) && this.lookaheadCharCode() === 60) {
if (noCalls) {
state.stop = true;
return base;
}
state.optionalChainMember = isOptionalCall = true;
this.next();
}
if (this.match(47) || this.match(51)) {
let missingParenErrorLoc;
const result = this.tsTryParseAndCatch(() => {
if (!noCalls && this.atPossibleAsyncArrow(base)) {
const asyncArrowFn = this.tsTryParseGenericAsyncArrowFunction(
startPos,
startLoc
);
if (asyncArrowFn) {
return asyncArrowFn;
}
}
const typeArguments = this.tsParseTypeArgumentsInExpression();
if (!typeArguments) throw this.unexpected();
if (isOptionalCall && !this.match(10)) {
missingParenErrorLoc = this.state.curPosition();
throw this.unexpected();
}
if (tokenIsTemplate(this.state.type)) {
const result = this.parseTaggedTemplateExpression(
base,
startPos,
startLoc,
state
);
result.typeParameters = typeArguments;
return result;
}
if (!noCalls && this.eat(10)) {
const node = this.startNodeAt(startPos, startLoc);
node.callee = base;
node.arguments = this.parseCallExpressionArguments(11, false);
this.tsCheckForInvalidTypeCasts(node.arguments);
node.typeParameters = typeArguments;
if (state.optionalChainMember) {
node.optional = isOptionalCall;
}
return this.finishCallExpression(node, state.optionalChainMember);
}
if (
tsTokenCanStartExpression(this.state.type) &&
this.state.type !== 10
) {
throw this.unexpected();
}
const node = this.startNodeAt(startPos, startLoc);
node.expression = base;
node.typeParameters = typeArguments;
return this.finishNode(node, 'TSInstantiationExpression');
});
if (missingParenErrorLoc) {
this.unexpected(missingParenErrorLoc, 10);
}
if (result) return result;
}
return super.parseSubscript(base, startPos, startLoc, noCalls, state);
}
parseNewCallee(node) {
var _callee$extra;
super.parseNewCallee(node);
const { callee } = node;
if (
callee.type === 'TSInstantiationExpression' &&
!((_callee$extra = callee.extra) != null && _callee$extra.parenthesized)
) {
node.typeParameters = callee.typeParameters;
node.callee = callee.expression;
}
}
parseExprOp(left, leftStartPos, leftStartLoc, minPrec) {
if (
tokenOperatorPrecedence(58) > minPrec &&
!this.hasPrecedingLineBreak() &&
this.isContextual(93)
) {
const node = this.startNodeAt(leftStartPos, leftStartLoc);
node.expression = left;
const _const = this.tsTryNextParseConstantContext();
if (_const) {
node.typeAnnotation = _const;
} else {
node.typeAnnotation = this.tsNextThenParseType();
}
this.finishNode(node, 'TSAsExpression');
this.reScan_lt_gt();
return this.parseExprOp(node, leftStartPos, leftStartLoc, minPrec);
}
return super.parseExprOp(left, leftStartPos, leftStartLoc, minPrec);
}
checkReservedWord(word, startLoc, checkKeywords, isBinding) {
if (!this.state.isAmbientContext) {
super.checkReservedWord(word, startLoc, checkKeywords, isBinding);
}
}
checkDuplicateExports() {}
parseImport(node) {
node.importKind = 'value';
if (
tokenIsIdentifier(this.state.type) ||
this.match(55) ||
this.match(5)
) {
let ahead = this.lookahead();
if (
this.isContextual(126) &&
ahead.type !== 12 &&
ahead.type !== 97 &&
ahead.type !== 29
) {
node.importKind = 'type';
this.next();
ahead = this.lookahead();
}
if (tokenIsIdentifier(this.state.type) && ahead.type === 29) {
return this.tsParseImportEqualsDeclaration(node);
}
}
const importNode = super.parseImport(node);
if (
importNode.importKind === 'type' &&
importNode.specifiers.length > 1 &&
importNode.specifiers[0].type === 'ImportDefaultSpecifier'
) {
this.raise(TSErrors.TypeImportCannotSpecifyDefaultAndNamed, {
at: importNode,
});
}
return importNode;
}
parseExport(node) {
if (this.match(83)) {
this.next();
if (this.isContextual(126) && this.lookaheadCharCode() !== 61) {
node.importKind = 'type';
this.next();
} else {
node.importKind = 'value';
}
return this.tsParseImportEqualsDeclaration(node, true);
} else if (this.eat(29)) {
const assign = node;
assign.expression = this.parseExpression();
this.semicolon();
return this.finishNode(assign, 'TSExportAssignment');
} else if (this.eatContextual(93)) {
const decl = node;
this.expectContextual(124);
decl.id = this.parseIdentifier();
this.semicolon();
return this.finishNode(decl, 'TSNamespaceExportDeclaration');
} else {
if (this.isContextual(126) && this.lookahead().type === 5) {
this.next();
node.exportKind = 'type';
} else {
node.exportKind = 'value';
}
return super.parseExport(node);
}
}
isAbstractClass() {
return this.isContextual(120) && this.lookahead().type === 80;
}
parseExportDefaultExpression() {
if (this.isAbstractClass()) {
const cls = this.startNode();
this.next();
cls.abstract = true;
this.parseClass(cls, true, true);
return cls;
}
if (this.match(125)) {
const result = this.tsParseInterfaceDeclaration(this.startNode());
if (result) return result;
}
return super.parseExportDefaultExpression();
}
parseVarStatement(node, kind, allowMissingInitializer = false) {
const { isAmbientContext } = this.state;
const declaration = super.parseVarStatement(
node,
kind,
allowMissingInitializer || isAmbientContext
);
if (!isAmbientContext) return declaration;
for (const { id, init } of declaration.declarations) {
if (!init) continue;
if (kind !== 'const' || !!id.typeAnnotation) {
this.raise(TSErrors.InitializerNotAllowedInAmbientContext, {
at: init,
});
} else if (
init.type !== 'StringLiteral' &&
init.type !== 'BooleanLiteral' &&
init.type !== 'NumericLiteral' &&
init.type !== 'BigIntLiteral' &&
(init.type !== 'TemplateLiteral' || init.expressions.length > 0) &&
!isPossiblyLiteralEnum(init)
) {
this.raise(
TSErrors.ConstInitiailizerMustBeStringOrNumericLiteralOrLiteralEnumReference,
{
at: init,
}
);
}
}
return declaration;
}
parseStatementContent(context, topLevel) {
if (this.match(75) && this.isLookaheadContextual('enum')) {
const node = this.startNode();
this.expect(75);
return this.tsParseEnumDeclaration(node, {
const: true,
});
}
if (this.isContextual(122)) {
return this.tsParseEnumDeclaration(this.startNode());
}
if (this.isContextual(125)) {
const result = this.tsParseInterfaceDeclaration(this.startNode());
if (result) return result;
}
return super.parseStatementContent(context, topLevel);
}
parseAccessModifier() {
return this.tsParseModifier(['public', 'protected', 'private']);
}
tsHasSomeModifiers(member, modifiers) {
return modifiers.some((modifier) => {
if (tsIsAccessModifier(modifier)) {
return member.accessibility === modifier;
}
return !!member[modifier];
});
}
tsIsStartOfStaticBlocks() {
return this.isContextual(104) && this.lookaheadCharCode() === 123;
}
parseClassMember(classBody, member, state) {
const modifiers = [
'declare',
'private',
'public',
'protected',
'override',
'abstract',
'readonly',
'static',
];
this.tsParseModifiers({
modified: member,
allowedModifiers: modifiers,
disallowedModifiers: ['in', 'out'],
stopOnStartOfClassStaticBlock: true,
errorTemplate: TSErrors.InvalidModifierOnTypeParameterPositions,
});
const callParseClassMemberWithIsStatic = () => {
if (this.tsIsStartOfStaticBlocks()) {
this.next();
this.next();
if (this.tsHasSomeModifiers(member, modifiers)) {
this.raise(TSErrors.StaticBlockCannotHaveModifier, {
at: this.state.curPosition(),
});
}
this.parseClassStaticBlock(classBody, member);
} else {
this.parseClassMemberWithIsStatic(
classBody,
member,
state,
!!member.static
);
}
};
if (member.declare) {
this.tsInAmbientContext(callParseClassMemberWithIsStatic);
} else {
callParseClassMemberWithIsStatic();
}
}
parseClassMemberWithIsStatic(classBody, member, state, isStatic) {
const idx = this.tsTryParseIndexSignature(member);
if (idx) {
classBody.body.push(idx);
if (member.abstract) {
this.raise(TSErrors.IndexSignatureHasAbstract, {
at: member,
});
}
if (member.accessibility) {
this.raise(TSErrors.IndexSignatureHasAccessibility, {
at: member,
modifier: member.accessibility,
});
}
if (member.declare) {
this.raise(TSErrors.IndexSignatureHasDeclare, {
at: member,
});
}
if (member.override) {
this.raise(TSErrors.IndexSignatureHasOverride, {
at: member,
});
}
return;
}
if (!this.state.inAbstractClass && member.abstract) {
this.raise(TSErrors.NonAbstractClassHasAbstractMethod, {
at: member,
});
}
if (member.override) {
if (!state.hadSuperClass) {
this.raise(TSErrors.OverrideNotInSubClass, {
at: member,
});
}
}
super.parseClassMemberWithIsStatic(classBody, member, state, isStatic);
}
parsePostMemberNameModifiers(methodOrProp) {
const optional = this.eat(17);
if (optional) methodOrProp.optional = true;
if (methodOrProp.readonly && this.match(10)) {
this.raise(TSErrors.ClassMethodHasReadonly, {
at: methodOrProp,
});
}
if (methodOrProp.declare && this.match(10)) {
this.raise(TSErrors.ClassMethodHasDeclare, {
at: methodOrProp,
});
}
}
parseExpressionStatement(node, expr) {
const decl =
expr.type === 'Identifier' ?
this.tsParseExpressionStatement(node, expr)
: undefined;
return decl || super.parseExpressionStatement(node, expr);
}
shouldParseExportDeclaration() {
if (this.tsIsDeclarationStart()) return true;
return super.shouldParseExportDeclaration();
}
parseConditional(expr, startPos, startLoc, refExpressionErrors) {
if (!this.state.maybeInArrowParameters || !this.match(17)) {
return super.parseConditional(
expr,
startPos,
startLoc,
refExpressionErrors
);
}
const result = this.tryParse(() =>
super.parseConditional(expr, startPos, startLoc)
);
if (!result.node) {
if (result.error) {
super.setOptionalParametersError(refExpressionErrors, result.error);
}
return expr;
}
if (result.error) this.state = result.failState;
return result.node;
}
parseParenItem(node, startPos, startLoc) {
node = super.parseParenItem(node, startPos, startLoc);
if (this.eat(17)) {
node.optional = true;
this.resetEndLocation(node);
}
if (this.match(14)) {
const typeCastNode = this.startNodeAt(startPos, startLoc);
typeCastNode.expression = node;
typeCastNode.typeAnnotation = this.tsParseTypeAnnotation();
return this.finishNode(typeCastNode, 'TSTypeCastExpression');
}
return node;
}
parseExportDeclaration(node) {
if (!this.state.isAmbientContext && this.isContextual(121)) {
return this.tsInAmbientContext(() => this.parseExportDeclaration(node));
}
const startPos = this.state.start;
const startLoc = this.state.startLoc;
const isDeclare = this.eatContextual(121);
if (
isDeclare &&
(this.isContextual(121) || !this.shouldParseExportDeclaration())
) {
throw this.raise(TSErrors.ExpectedAmbientAfterExportDeclare, {
at: this.state.startLoc,
});
}
const isIdentifier = tokenIsIdentifier(this.state.type);
const declaration =
(isIdentifier && this.tsTryParseExportDeclaration()) ||
super.parseExportDeclaration(node);
if (!declaration) return null;
if (
declaration.type === 'TSInterfaceDeclaration' ||
declaration.type === 'TSTypeAliasDeclaration' ||
isDeclare
) {
node.exportKind = 'type';
}
if (isDeclare) {
this.resetStartLocation(declaration, startPos, startLoc);
declaration.declare = true;
}
return declaration;
}
parseClassId(node, isStatement, optionalId) {
if ((!isStatement || optionalId) && this.isContextual(110)) {
return;
}
super.parseClassId(
node,
isStatement,
optionalId,
node.declare ? BIND_TS_AMBIENT : BIND_CLASS
);
const typeParameters = this.tsTryParseTypeParameters(
this.tsParseInOutModifiers.bind(this)
);
if (typeParameters) node.typeParameters = typeParameters;
}
parseClassPropertyAnnotation(node) {
if (!node.optional && this.eat(35)) {
node.definite = true;
}
const type = this.tsTryParseTypeAnnotation();
if (type) node.typeAnnotation = type;
}
parseClassProperty(node) {
this.parseClassPropertyAnnotation(node);
if (this.state.isAmbientContext && this.match(29)) {
this.raise(TSErrors.DeclareClassFieldHasInitializer, {
at: this.state.startLoc,
});
}
if (node.abstract && this.match(29)) {
const { key } = node;
this.raise(TSErrors.AbstractPropertyHasInitializer, {
at: this.state.startLoc,
propertyName:
key.type === 'Identifier' && !node.computed ?
key.name
: `[${this.input.slice(key.start, key.end)}]`,
});
}
return super.parseClassProperty(node);
}
parseClassPrivateProperty(node) {
if (node.abstract) {
this.raise(TSErrors.PrivateElementHasAbstract, {
at: node,
});
}
if (node.accessibility) {
this.raise(TSErrors.PrivateElementHasAccessibility, {
at: node,
modifier: node.accessibility,
});
}
this.parseClassPropertyAnnotation(node);
return super.parseClassPrivateProperty(node);
}
pushClassMethod(
classBody,
method,
isGenerator,
isAsync,
isConstructor,
allowsDirectSuper
) {
const typeParameters = this.tsTryParseTypeParameters();
if (typeParameters && isConstructor) {
this.raise(TSErrors.ConstructorHasTypeParameters, {
at: typeParameters,
});
}
const { declare = false, kind } = method;
if (declare && (kind === 'get' || kind === 'set')) {
this.raise(TSErrors.DeclareAccessor, {
at: method,
kind,
});
}
if (typeParameters) method.typeParameters = typeParameters;
super.pushClassMethod(
classBody,
method,
isGenerator,
isAsync,
isConstructor,
allowsDirectSuper
);
}
pushClassPrivateMethod(classBody, method, isGenerator, isAsync) {
const typeParameters = this.tsTryParseTypeParameters();
if (typeParameters) method.typeParameters = typeParameters;
super.pushClassPrivateMethod(classBody, method, isGenerator, isAsync);
}
declareClassPrivateMethodInScope(node, kind) {
if (node.type === 'TSDeclareMethod') return;
if (node.type === 'MethodDefinition' && !node.value.body) return;
super.declareClassPrivateMethodInScope(node, kind);
}
parseClassSuper(node) {
super.parseClassSuper(node);
if (node.superClass && (this.match(47) || this.match(51))) {
node.superTypeParameters = this.tsParseTypeArgumentsInExpression();
}
if (this.eatContextual(110)) {
node.implements = this.tsParseHeritageClause('implements');
}
}
parseObjPropValue(prop, ...args) {
const typeParameters = this.tsTryParseTypeParameters();
if (typeParameters) prop.typeParameters = typeParameters;
super.parseObjPropValue(prop, ...args);
}
parseFunctionParams(node, allowModifiers) {
const typeParameters = this.tsTryParseTypeParameters();
if (typeParameters) node.typeParameters = typeParameters;
super.parseFunctionParams(node, allowModifiers);
}
parseVarId(decl, kind) {
super.parseVarId(decl, kind);
if (
decl.id.type === 'Identifier' &&
!this.hasPrecedingLineBreak() &&
this.eat(35)
) {
decl.definite = true;
}
const type = this.tsTryParseTypeAnnotation();
if (type) {
decl.id.typeAnnotation = type;
this.resetEndLocation(decl.id);
}
}
parseAsyncArrowFromCallExpression(node, call) {
if (this.match(14)) {
node.returnType = this.tsParseTypeAnnotation();
}
return super.parseAsyncArrowFromCallExpression(node, call);
}
parseMaybeAssign(...args) {
var _jsx, _jsx2, _typeCast, _jsx3, _typeCast2, _jsx4, _typeCast3;
let state;
let jsx;
let typeCast;
if (this.hasPlugin('jsx') && (this.match(138) || this.match(47))) {
state = this.state.clone();
jsx = this.tryParse(() => super.parseMaybeAssign(...args), state);
if (!jsx.error) return jsx.node;
const { context } = this.state;
const currentContext = context[context.length - 1];
if (
currentContext === types.j_oTag ||
currentContext === types.j_expr
) {
context.pop();
}
}
if (!((_jsx = jsx) != null && _jsx.error) && !this.match(47)) {
return super.parseMaybeAssign(...args);
}
let typeParameters;
state = state || this.state.clone();
const arrow = this.tryParse((abort) => {
var _expr$extra, _typeParameters, _expr$typeParameters$;
typeParameters = this.tsParseTypeParameters();
const expr = super.parseMaybeAssign(...args);
if (
expr.type !== 'ArrowFunctionExpression' ||
((_expr$extra = expr.extra) != null && _expr$extra.parenthesized)
) {
abort();
}
if (
((_typeParameters = typeParameters) == null ?
void 0
: _typeParameters.params.length) !== 0
) {
this.resetStartLocationFromNode(expr, typeParameters);
}
expr.typeParameters = typeParameters;
if (
this.hasPlugin('jsx') &&
expr.typeParameters.params.length === 1 &&
!(
(_expr$typeParameters$ = expr.typeParameters.extra) != null &&
_expr$typeParameters$.trailingComma
)
) {
const parameter = expr.typeParameters.params[0];
if (!parameter.constraint);
}
return expr;
}, state);
if (!arrow.error && !arrow.aborted) {
if (typeParameters) this.reportReservedArrowTypeParam(typeParameters);
return arrow.node;
}
if (!jsx) {
assert(!this.hasPlugin('jsx'));
typeCast = this.tryParse(() => super.parseMaybeAssign(...args), state);
if (!typeCast.error) return typeCast.node;
}
if ((_jsx2 = jsx) != null && _jsx2.node) {
this.state = jsx.failState;
return jsx.node;
}
if (arrow.node) {
this.state = arrow.failState;
if (typeParameters) this.reportReservedArrowTypeParam(typeParameters);
return arrow.node;
}
if ((_typeCast = typeCast) != null && _typeCast.node) {
this.state = typeCast.failState;
return typeCast.node;
}
if ((_jsx3 = jsx) != null && _jsx3.thrown) throw jsx.error;
if (arrow.thrown) throw arrow.error;
if ((_typeCast2 = typeCast) != null && _typeCast2.thrown)
throw typeCast.error;
throw (
((_jsx4 = jsx) == null ? void 0 : _jsx4.error) ||
arrow.error ||
((_typeCast3 = typeCast) == null ? void 0 : _typeCast3.error)
);
}
reportReservedArrowTypeParam(node) {
var _node$extra;
if (
node.params.length === 1 &&
!((_node$extra = node.extra) != null && _node$extra.trailingComma) &&
this.getPluginOption('typescript', 'disallowAmbiguousJSXLike')
) {
this.raise(TSErrors.ReservedArrowTypeParam, {
at: node,
});
}
}
parseMaybeUnary(refExpressionErrors) {
if (!this.hasPlugin('jsx') && this.match(47)) {
return this.tsParseTypeAssertion();
} else {
return super.parseMaybeUnary(refExpressionErrors);
}
}
parseArrow(node) {
if (this.match(14)) {
const result = this.tryParse((abort) => {
const returnType = this.tsParseTypeOrTypePredicateAnnotation(14);
if (this.canInsertSemicolon() || !this.match(19)) abort();
return returnType;
});
if (result.aborted) return;
if (!result.thrown) {
if (result.error) this.state = result.failState;
node.returnType = result.node;
}
}
return super.parseArrow(node);
}
parseAssignableListItemTypes(param) {
if (this.eat(17)) {
if (
param.type !== 'Identifier' &&
!this.state.isAmbientContext &&
!this.state.inType
) {
this.raise(TSErrors.PatternIsOptional, {
at: param,
});
}
param.optional = true;
}
const type = this.tsTryParseTypeAnnotation();
if (type) param.typeAnnotation = type;
this.resetEndLocation(param);
return param;
}
isAssignable(node, isBinding) {
switch (node.type) {
case 'TSTypeCastExpression':
return this.isAssignable(node.expression, isBinding);
case 'TSParameterProperty':
return true;
default:
return super.isAssignable(node, isBinding);
}
}
toAssignable(node, isLHS = false) {
switch (node.type) {
case 'ParenthesizedExpression':
this.toAssignableParenthesizedExpression(node, isLHS);
break;
case 'TSAsExpression':
case 'TSNonNullExpression':
case 'TSTypeAssertion':
if (isLHS) {
this.expressionScope.recordArrowParemeterBindingError(
TSErrors.UnexpectedTypeCastInParameter,
{
at: node,
}
);
} else {
this.raise(TSErrors.UnexpectedTypeCastInParameter, {
at: node,
});
}
this.toAssignable(node.expression, isLHS);
break;
case 'AssignmentExpression':
if (!isLHS && node.left.type === 'TSTypeCastExpression') {
node.left = this.typeCastToParameter(node.left);
}
default:
super.toAssignable(node, isLHS);
}
}
toAssignableParenthesizedExpression(node, isLHS) {
switch (node.expression.type) {
case 'TSAsExpression':
case 'TSNonNullExpression':
case 'TSTypeAssertion':
case 'ParenthesizedExpression':
this.toAssignable(node.expression, isLHS);
break;
default:
super.toAssignable(node, isLHS);
}
}
checkToRestConversion(node, allowPattern) {
switch (node.type) {
case 'TSAsExpression':
case 'TSTypeAssertion':
case 'TSNonNullExpression':
this.checkToRestConversion(node.expression, false);
break;
default:
super.checkToRestConversion(node, allowPattern);
}
}
isValidLVal(type, isUnparenthesizedInAssign, binding) {
return (
getOwn$1(
{
TSTypeCastExpression: true,
TSParameterProperty: 'parameter',
TSNonNullExpression: 'expression',
TSAsExpression: (binding !== BIND_NONE ||
!isUnparenthesizedInAssign) && ['expression', true],
TSTypeAssertion: (binding !== BIND_NONE ||
!isUnparenthesizedInAssign) && ['expression', true],
},
type
) || super.isValidLVal(type, isUnparenthesizedInAssign, binding)
);
}
parseBindingAtom() {
switch (this.state.type) {
case 78:
return this.parseIdentifier(true);
default:
return super.parseBindingAtom();
}
}
parseMaybeDecoratorArguments(expr) {
if (this.match(47) || this.match(51)) {
const typeArguments = this.tsParseTypeArgumentsInExpression();
if (this.match(10)) {
const call = super.parseMaybeDecoratorArguments(expr);
call.typeParameters = typeArguments;
return call;
}
this.unexpected(null, 10);
}
return super.parseMaybeDecoratorArguments(expr);
}
checkCommaAfterRest(close) {
if (
this.state.isAmbientContext &&
this.match(12) &&
this.lookaheadCharCode() === close
) {
this.next();
return false;
} else {
return super.checkCommaAfterRest(close);
}
}
isClassMethod() {
return this.match(47) || super.isClassMethod();
}
isClassProperty() {
return this.match(35) || this.match(14) || super.isClassProperty();
}
parseMaybeDefault(...args) {
const node = super.parseMaybeDefault(...args);
if (
node.type === 'AssignmentPattern' &&
node.typeAnnotation &&
node.right.start < node.typeAnnotation.start
) {
this.raise(TSErrors.TypeAnnotationAfterAssign, {
at: node.typeAnnotation,
});
}
return node;
}
getTokenFromCode(code) {
if (this.state.inType) {
if (code === 62) {
return this.finishOp(48, 1);
}
if (code === 60) {
return this.finishOp(47, 1);
}
}
return super.getTokenFromCode(code);
}
reScan_lt_gt() {
const { type } = this.state;
if (type === 47) {
this.state.pos -= 1;
this.readToken_lt();
} else if (type === 48) {
this.state.pos -= 1;
this.readToken_gt();
}
}
reScan_lt() {
const { type } = this.state;
if (type === 51) {
this.state.pos -= 2;
this.finishOp(47, 1);
return 47;
}
return type;
}
toAssignableList(exprList) {
for (let i = 0; i < exprList.length; i++) {
const expr = exprList[i];
if ((expr == null ? void 0 : expr.type) === 'TSTypeCastExpression') {
exprList[i] = this.typeCastToParameter(expr);
}
}
super.toAssignableList(...arguments);
}
typeCastToParameter(node) {
node.expression.typeAnnotation = node.typeAnnotation;
this.resetEndLocation(node.expression, node.typeAnnotation.loc.end);
return node.expression;
}
shouldParseArrow(params) {
if (this.match(14)) {
return params.every((expr) => this.isAssignable(expr, true));
}
return super.shouldParseArrow(params);
}
shouldParseAsyncArrow() {
return this.match(14) || super.shouldParseAsyncArrow();
}
canHaveLeadingDecorator() {
return super.canHaveLeadingDecorator() || this.isAbstractClass();
}
jsxParseOpeningElementAfterName(node) {
if (this.match(47) || this.match(51)) {
const typeArguments = this.tsTryParseAndCatch(() =>
this.tsParseTypeArgumentsInExpression()
);
if (typeArguments) node.typeParameters = typeArguments;
}
return super.jsxParseOpeningElementAfterName(node);
}
getGetterSetterExpectedParamCount(method) {
const baseCount = super.getGetterSetterExpectedParamCount(method);
const params = this.getObjectOrClassMethodParams(method);
const firstParam = params[0];
const hasContextParam = firstParam && this.isThisParam(firstParam);
return hasContextParam ? baseCount + 1 : baseCount;
}
parseCatchClauseParam() {
const param = super.parseCatchClauseParam();
const type = this.tsTryParseTypeAnnotation();
if (type) {
param.typeAnnotation = type;
this.resetEndLocation(param);
}
return param;
}
tsInAmbientContext(cb) {
const oldIsAmbientContext = this.state.isAmbientContext;
this.state.isAmbientContext = true;
try {
return cb();
} finally {
this.state.isAmbientContext = oldIsAmbientContext;
}
}
parseClass(node, ...args) {
const oldInAbstractClass = this.state.inAbstractClass;
this.state.inAbstractClass = !!node.abstract;
try {
return super.parseClass(node, ...args);
} finally {
this.state.inAbstractClass = oldInAbstractClass;
}
}
tsParseAbstractDeclaration(node) {
if (this.match(80)) {
node.abstract = true;
return this.parseClass(node, true, false);
} else if (this.isContextual(125)) {
if (!this.hasFollowingLineBreak()) {
node.abstract = true;
this.raise(TSErrors.NonClassMethodPropertyHasAbstractModifer, {
at: node,
});
return this.tsParseInterfaceDeclaration(node);
}
} else {
this.unexpected(null, 80);
}
}
parseMethod(...args) {
const method = super.parseMethod(...args);
if (method.abstract) {
const hasBody =
this.hasPlugin('estree') ? !!method.value.body : !!method.body;
if (hasBody) {
const { key } = method;
this.raise(TSErrors.AbstractMethodHasImplementation, {
at: method,
methodName:
key.type === 'Identifier' && !method.computed ?
key.name
: `[${this.input.slice(key.start, key.end)}]`,
});
}
}
return method;
}
tsParseTypeParameterName() {
const typeName = this.parseIdentifier();
return typeName.name;
}
shouldParseAsAmbientContext() {
return !!this.getPluginOption('typescript', 'dts');
}
parse() {
if (this.shouldParseAsAmbientContext()) {
this.state.isAmbientContext = true;
}
return super.parse();
}
getExpression() {
if (this.shouldParseAsAmbientContext()) {
this.state.isAmbientContext = true;
}
return super.getExpression();
}
parseExportSpecifier(node, isString, isInTypeExport, isMaybeTypeOnly) {
if (!isString && isMaybeTypeOnly) {
this.parseTypeOnlyImportExportSpecifier(node, false, isInTypeExport);
return this.finishNode(node, 'ExportSpecifier');
}
node.exportKind = 'value';
return super.parseExportSpecifier(
node,
isString,
isInTypeExport,
isMaybeTypeOnly
);
}
parseImportSpecifier(
specifier,
importedIsString,
isInTypeOnlyImport,
isMaybeTypeOnly
) {
if (!importedIsString && isMaybeTypeOnly) {
this.parseTypeOnlyImportExportSpecifier(
specifier,
true,
isInTypeOnlyImport
);
return this.finishNode(specifier, 'ImportSpecifier');
}
specifier.importKind = 'value';
return super.parseImportSpecifier(
specifier,
importedIsString,
isInTypeOnlyImport,
isMaybeTypeOnly
);
}
parseTypeOnlyImportExportSpecifier(
node,
isImport,
isInTypeOnlyImportExport
) {
const leftOfAsKey = isImport ? 'imported' : 'local';
const rightOfAsKey = isImport ? 'local' : 'exported';
let leftOfAs = node[leftOfAsKey];
let rightOfAs;
let hasTypeSpecifier = false;
let canParseAsKeyword = true;
const loc = leftOfAs.loc.start;
if (this.isContextual(93)) {
const firstAs = this.parseIdentifier();
if (this.isContextual(93)) {
const secondAs = this.parseIdentifier();
if (tokenIsKeywordOrIdentifier(this.state.type)) {
hasTypeSpecifier = true;
leftOfAs = firstAs;
rightOfAs =
isImport ? this.parseIdentifier() : this.parseModuleExportName();
canParseAsKeyword = false;
} else {
rightOfAs = secondAs;
canParseAsKeyword = false;
}
} else if (tokenIsKeywordOrIdentifier(this.state.type)) {
canParseAsKeyword = false;
rightOfAs =
isImport ? this.parseIdentifier() : this.parseModuleExportName();
} else {
hasTypeSpecifier = true;
leftOfAs = firstAs;
}
} else if (tokenIsKeywordOrIdentifier(this.state.type)) {
hasTypeSpecifier = true;
if (isImport) {
leftOfAs = this.parseIdentifier(true);
if (!this.isContextual(93)) {
this.checkReservedWord(
leftOfAs.name,
leftOfAs.loc.start,
true,
true
);
}
} else {
leftOfAs = this.parseModuleExportName();
}
}
if (hasTypeSpecifier && isInTypeOnlyImportExport) {
this.raise(
isImport ?
TSErrors.TypeModifierIsUsedInTypeImports
: TSErrors.TypeModifierIsUsedInTypeExports,
{
at: loc,
}
);
}
node[leftOfAsKey] = leftOfAs;
node[rightOfAsKey] = rightOfAs;
const kindKey = isImport ? 'importKind' : 'exportKind';
node[kindKey] = hasTypeSpecifier ? 'type' : 'value';
if (canParseAsKeyword && this.eatContextual(93)) {
node[rightOfAsKey] =
isImport ? this.parseIdentifier() : this.parseModuleExportName();
}
if (!node[rightOfAsKey]) {
node[rightOfAsKey] = cloneIdentifier(node[leftOfAsKey]);
}
if (isImport) {
this.checkIdentifier(node[rightOfAsKey], BIND_LEXICAL);
}
}
};
function isPossiblyLiteralEnum(expression) {
if (expression.type !== 'MemberExpression') return false;
const { computed, property } = expression;
if (
computed &&
property.type !== 'StringLiteral' &&
(property.type !== 'TemplateLiteral' || property.expressions.length > 0)
) {
return false;
}
return isUncomputedMemberExpressionChain(expression.object);
}
function isUncomputedMemberExpressionChain(expression) {
if (expression.type === 'Identifier') return true;
if (expression.type !== 'MemberExpression') return false;
if (expression.computed) return false;
return isUncomputedMemberExpressionChain(expression.object);
}
const PlaceholderErrors = ParseErrorEnum`placeholders`((_) => ({
ClassNameIsRequired: _('A class name is required.'),
UnexpectedSpace: _('Unexpected space in placeholder.'),
}));
var placeholders = (superClass) =>
class extends superClass {
parsePlaceholder(expectedNode) {
if (this.match(140)) {
const node = this.startNode();
this.next();
this.assertNoSpace();
node.name = super.parseIdentifier(true);
this.assertNoSpace();
this.expect(140);
return this.finishPlaceholder(node, expectedNode);
}
}
finishPlaceholder(node, expectedNode) {
const isFinished = !!(node.expectedNode && node.type === 'Placeholder');
node.expectedNode = expectedNode;
return isFinished ? node : this.finishNode(node, 'Placeholder');
}
getTokenFromCode(code) {
if (code === 37 && this.input.charCodeAt(this.state.pos + 1) === 37) {
return this.finishOp(140, 2);
}
return super.getTokenFromCode(...arguments);
}
parseExprAtom() {
return (
this.parsePlaceholder('Expression') || super.parseExprAtom(...arguments)
);
}
parseIdentifier() {
return (
this.parsePlaceholder('Identifier') ||
super.parseIdentifier(...arguments)
);
}
checkReservedWord(word) {
if (word !== undefined) super.checkReservedWord(...arguments);
}
parseBindingAtom() {
return (
this.parsePlaceholder('Pattern') || super.parseBindingAtom(...arguments)
);
}
isValidLVal(type, ...rest) {
return type === 'Placeholder' || super.isValidLVal(type, ...rest);
}
toAssignable(node) {
if (
node &&
node.type === 'Placeholder' &&
node.expectedNode === 'Expression'
) {
node.expectedNode = 'Pattern';
} else {
super.toAssignable(...arguments);
}
}
isLet(context) {
if (super.isLet(context)) {
return true;
}
if (!this.isContextual(99)) {
return false;
}
if (context) return false;
const nextToken = this.lookahead();
if (nextToken.type === 140) {
return true;
}
return false;
}
verifyBreakContinue(node) {
if (node.label && node.label.type === 'Placeholder') return;
super.verifyBreakContinue(...arguments);
}
parseExpressionStatement(node, expr) {
if (
expr.type !== 'Placeholder' ||
(expr.extra && expr.extra.parenthesized)
) {
return super.parseExpressionStatement(...arguments);
}
if (this.match(14)) {
const stmt = node;
stmt.label = this.finishPlaceholder(expr, 'Identifier');
this.next();
stmt.body = this.parseStatement('label');
return this.finishNode(stmt, 'LabeledStatement');
}
this.semicolon();
node.name = expr.name;
return this.finishPlaceholder(node, 'Statement');
}
parseBlock() {
return (
this.parsePlaceholder('BlockStatement') ||
super.parseBlock(...arguments)
);
}
parseFunctionId() {
return (
this.parsePlaceholder('Identifier') ||
super.parseFunctionId(...arguments)
);
}
parseClass(node, isStatement, optionalId) {
const type = isStatement ? 'ClassDeclaration' : 'ClassExpression';
this.next();
this.takeDecorators(node);
const oldStrict = this.state.strict;
const placeholder = this.parsePlaceholder('Identifier');
if (placeholder) {
if (this.match(81) || this.match(140) || this.match(5)) {
node.id = placeholder;
} else if (optionalId || !isStatement) {
node.id = null;
node.body = this.finishPlaceholder(placeholder, 'ClassBody');
return this.finishNode(node, type);
} else {
throw this.raise(PlaceholderErrors.ClassNameIsRequired, {
at: this.state.startLoc,
});
}
} else {
this.parseClassId(node, isStatement, optionalId);
}
this.parseClassSuper(node);
node.body =
this.parsePlaceholder('ClassBody') ||
this.parseClassBody(!!node.superClass, oldStrict);
return this.finishNode(node, type);
}
parseExport(node) {
const placeholder = this.parsePlaceholder('Identifier');
if (!placeholder) return super.parseExport(...arguments);
if (!this.isContextual(97) && !this.match(12)) {
node.specifiers = [];
node.source = null;
node.declaration = this.finishPlaceholder(placeholder, 'Declaration');
return this.finishNode(node, 'ExportNamedDeclaration');
}
this.expectPlugin('exportDefaultFrom');
const specifier = this.startNode();
specifier.exported = placeholder;
node.specifiers = [this.finishNode(specifier, 'ExportDefaultSpecifier')];
return super.parseExport(node);
}
isExportDefaultSpecifier() {
if (this.match(65)) {
const next = this.nextTokenStart();
if (this.isUnparsedContextual(next, 'from')) {
if (
this.input.startsWith(
tokenLabelName(140),
this.nextTokenStartSince(next + 4)
)
) {
return true;
}
}
}
return super.isExportDefaultSpecifier();
}
maybeParseExportDefaultSpecifier(node) {
if (node.specifiers && node.specifiers.length > 0) {
return true;
}
return super.maybeParseExportDefaultSpecifier(...arguments);
}
checkExport(node) {
const { specifiers } = node;
if (specifiers != null && specifiers.length) {
node.specifiers = specifiers.filter(
(node) => node.exported.type === 'Placeholder'
);
}
super.checkExport(node);
node.specifiers = specifiers;
}
parseImport(node) {
const placeholder = this.parsePlaceholder('Identifier');
if (!placeholder) return super.parseImport(...arguments);
node.specifiers = [];
if (!this.isContextual(97) && !this.match(12)) {
node.source = this.finishPlaceholder(placeholder, 'StringLiteral');
this.semicolon();
return this.finishNode(node, 'ImportDeclaration');
}
const specifier = this.startNodeAtNode(placeholder);
specifier.local = placeholder;
this.finishNode(specifier, 'ImportDefaultSpecifier');
node.specifiers.push(specifier);
if (this.eat(12)) {
const hasStarImport = this.maybeParseStarImportSpecifier(node);
if (!hasStarImport) this.parseNamedImportSpecifiers(node);
}
this.expectContextual(97);
node.source = this.parseImportSource();
this.semicolon();
return this.finishNode(node, 'ImportDeclaration');
}
parseImportSource() {
return (
this.parsePlaceholder('StringLiteral') ||
super.parseImportSource(...arguments)
);
}
assertNoSpace() {
if (this.state.start > this.state.lastTokEndLoc.index) {
this.raise(PlaceholderErrors.UnexpectedSpace, {
at: this.state.lastTokEndLoc,
});
}
}
};
var v8intrinsic = (superClass) =>
class extends superClass {
parseV8Intrinsic() {
if (this.match(54)) {
const v8IntrinsicStartLoc = this.state.startLoc;
const node = this.startNode();
this.next();
if (tokenIsIdentifier(this.state.type)) {
const name = this.parseIdentifierName(this.state.start);
const identifier = this.createIdentifier(node, name);
identifier.type = 'V8IntrinsicIdentifier';
if (this.match(10)) {
return identifier;
}
}
this.unexpected(v8IntrinsicStartLoc);
}
}
parseExprAtom() {
return this.parseV8Intrinsic() || super.parseExprAtom(...arguments);
}
};
function hasPlugin(plugins, expectedConfig) {
const [expectedName, expectedOptions] =
typeof expectedConfig === 'string' ? [expectedConfig, {}] : expectedConfig;
const expectedKeys = Object.keys(expectedOptions);
const expectedOptionsIsEmpty = expectedKeys.length === 0;
return plugins.some((p) => {
if (typeof p === 'string') {
return expectedOptionsIsEmpty && p === expectedName;
} else {
const [pluginName, pluginOptions] = p;
if (pluginName !== expectedName) {
return false;
}
for (const key of expectedKeys) {
if (pluginOptions[key] !== expectedOptions[key]) {
return false;
}
}
return true;
}
});
}
function getPluginOption(plugins, name, option) {
const plugin = plugins.find((plugin) => {
if (Array.isArray(plugin)) {
return plugin[0] === name;
} else {
return plugin === name;
}
});
if (plugin && Array.isArray(plugin)) {
return plugin[1][option];
}
return null;
}
const PIPELINE_PROPOSALS = ['minimal', 'fsharp', 'hack', 'smart'];
const TOPIC_TOKENS = ['^^', '@@', '^', '%', '#'];
const RECORD_AND_TUPLE_SYNTAX_TYPES = ['hash', 'bar'];
function validatePlugins(plugins) {
if (hasPlugin(plugins, 'decorators')) {
if (hasPlugin(plugins, 'decorators-legacy')) {
throw new Error(
'Cannot use the decorators and decorators-legacy plugin together'
);
}
const decoratorsBeforeExport = getPluginOption(
plugins,
'decorators',
'decoratorsBeforeExport'
);
if (decoratorsBeforeExport == null) {
throw new Error(
"The 'decorators' plugin requires a 'decoratorsBeforeExport' option," +
' whose value must be a boolean. If you are migrating from' +
' Babylon/Babel 6 or want to use the old decorators proposal, you' +
" should use the 'decorators-legacy' plugin instead of 'decorators'."
);
} else if (typeof decoratorsBeforeExport !== 'boolean') {
throw new Error("'decoratorsBeforeExport' must be a boolean.");
}
}
if (hasPlugin(plugins, 'flow') && hasPlugin(plugins, 'typescript')) {
throw new Error('Cannot combine flow and typescript plugins.');
}
if (hasPlugin(plugins, 'placeholders') && hasPlugin(plugins, 'v8intrinsic')) {
throw new Error('Cannot combine placeholders and v8intrinsic plugins.');
}
if (hasPlugin(plugins, 'pipelineOperator')) {
const proposal = getPluginOption(plugins, 'pipelineOperator', 'proposal');
if (!PIPELINE_PROPOSALS.includes(proposal)) {
const proposalList = PIPELINE_PROPOSALS.map((p) => `"${p}"`).join(', ');
throw new Error(
`"pipelineOperator" requires "proposal" option whose value must be one of: ${proposalList}.`
);
}
const tupleSyntaxIsHash = hasPlugin(plugins, [
'recordAndTuple',
{
syntaxType: 'hash',
},
]);
if (proposal === 'hack') {
if (hasPlugin(plugins, 'placeholders')) {
throw new Error(
'Cannot combine placeholders plugin and Hack-style pipes.'
);
}
if (hasPlugin(plugins, 'v8intrinsic')) {
throw new Error(
'Cannot combine v8intrinsic plugin and Hack-style pipes.'
);
}
const topicToken = getPluginOption(
plugins,
'pipelineOperator',
'topicToken'
);
if (!TOPIC_TOKENS.includes(topicToken)) {
const tokenList = TOPIC_TOKENS.map((t) => `"${t}"`).join(', ');
throw new Error(
`"pipelineOperator" in "proposal": "hack" mode also requires a "topicToken" option whose value must be one of: ${tokenList}.`
);
}
if (topicToken === '#' && tupleSyntaxIsHash) {
throw new Error(
'Plugin conflict between `["pipelineOperator", { proposal: "hack", topicToken: "#" }]` and `["recordAndtuple", { syntaxType: "hash"}]`.'
);
}
} else if (proposal === 'smart' && tupleSyntaxIsHash) {
throw new Error(
'Plugin conflict between `["pipelineOperator", { proposal: "smart" }]` and `["recordAndtuple", { syntaxType: "hash"}]`.'
);
}
}
if (hasPlugin(plugins, 'moduleAttributes')) {
{
if (hasPlugin(plugins, 'importAssertions')) {
throw new Error(
'Cannot combine importAssertions and moduleAttributes plugins.'
);
}
const moduleAttributesVersionPluginOption = getPluginOption(
plugins,
'moduleAttributes',
'version'
);
if (moduleAttributesVersionPluginOption !== 'may-2020') {
throw new Error(
"The 'moduleAttributes' plugin requires a 'version' option," +
' representing the last proposal update. Currently, the' +
" only supported value is 'may-2020'."
);
}
}
}
if (
hasPlugin(plugins, 'recordAndTuple') &&
!RECORD_AND_TUPLE_SYNTAX_TYPES.includes(
getPluginOption(plugins, 'recordAndTuple', 'syntaxType')
)
) {
throw new Error(
"'recordAndTuple' requires 'syntaxType' option whose value should be one of: " +
RECORD_AND_TUPLE_SYNTAX_TYPES.map((p) => `'${p}'`).join(', ')
);
}
if (
hasPlugin(plugins, 'asyncDoExpressions') &&
!hasPlugin(plugins, 'doExpressions')
) {
const error = new Error(
"'asyncDoExpressions' requires 'doExpressions', please add 'doExpressions' to parser plugins."
);
error.missingPlugins = 'doExpressions';
throw error;
}
}
const mixinPlugins = {
estree,
jsx,
flow,
typescript,
v8intrinsic,
placeholders,
};
const mixinPluginNames = Object.keys(mixinPlugins);
const defaultOptions = {
sourceType: 'script',
sourceFilename: undefined,
startColumn: 0,
startLine: 1,
allowAwaitOutsideFunction: false,
allowReturnOutsideFunction: false,
allowImportExportEverywhere: false,
allowSuperOutsideMethod: false,
allowUndeclaredExports: false,
plugins: [],
strictMode: null,
ranges: false,
tokens: false,
createParenthesizedExpressions: false,
errorRecovery: false,
attachComment: true,
};
function getOptions(opts) {
const options = {};
for (const key of Object.keys(defaultOptions)) {
options[key] = opts && opts[key] != null ? opts[key] : defaultOptions[key];
}
return options;
}
const getOwn = (object, key) =>
Object.hasOwnProperty.call(object, key) && object[key];
const unwrapParenthesizedExpression = (node) => {
return node.type === 'ParenthesizedExpression' ?
unwrapParenthesizedExpression(node.expression)
: node;
};
class LValParser extends NodeUtils {
toAssignable(node, isLHS = false) {
var _node$extra, _node$extra3;
let parenthesized = undefined;
if (
node.type === 'ParenthesizedExpression' ||
((_node$extra = node.extra) != null && _node$extra.parenthesized)
) {
parenthesized = unwrapParenthesizedExpression(node);
if (isLHS) {
if (parenthesized.type === 'Identifier') {
this.expressionScope.recordArrowParemeterBindingError(
Errors.InvalidParenthesizedAssignment,
{
at: node,
}
);
} else if (parenthesized.type !== 'MemberExpression') {
this.raise(Errors.InvalidParenthesizedAssignment, {
at: node,
});
}
} else {
this.raise(Errors.InvalidParenthesizedAssignment, {
at: node,
});
}
}
switch (node.type) {
case 'Identifier':
case 'ObjectPattern':
case 'ArrayPattern':
case 'AssignmentPattern':
case 'RestElement':
break;
case 'ObjectExpression':
node.type = 'ObjectPattern';
for (
let i = 0, length = node.properties.length, last = length - 1;
i < length;
i++
) {
var _node$extra2;
const prop = node.properties[i];
const isLast = i === last;
this.toAssignableObjectExpressionProp(prop, isLast, isLHS);
if (
isLast &&
prop.type === 'RestElement' &&
(_node$extra2 = node.extra) != null &&
_node$extra2.trailingCommaLoc
) {
this.raise(Errors.RestTrailingComma, {
at: node.extra.trailingCommaLoc,
});
}
}
break;
case 'ObjectProperty': {
const { key, value } = node;
if (this.isPrivateName(key)) {
this.classScope.usePrivateName(
this.getPrivateNameSV(key),
key.loc.start
);
}
this.toAssignable(value, isLHS);
break;
}
case 'SpreadElement': {
throw new Error(
'Internal @babel/parser error (this is a bug, please report it).' +
" SpreadElement should be converted by .toAssignable's caller."
);
}
case 'ArrayExpression':
node.type = 'ArrayPattern';
this.toAssignableList(
node.elements,
(_node$extra3 = node.extra) == null ?
void 0
: _node$extra3.trailingCommaLoc,
isLHS
);
break;
case 'AssignmentExpression':
if (node.operator !== '=') {
this.raise(Errors.MissingEqInAssignment, {
at: node.left.loc.end,
});
}
node.type = 'AssignmentPattern';
delete node.operator;
this.toAssignable(node.left, isLHS);
break;
case 'ParenthesizedExpression':
this.toAssignable(parenthesized, isLHS);
break;
}
}
toAssignableObjectExpressionProp(prop, isLast, isLHS) {
if (prop.type === 'ObjectMethod') {
this.raise(
prop.kind === 'get' || prop.kind === 'set' ?
Errors.PatternHasAccessor
: Errors.PatternHasMethod,
{
at: prop.key,
}
);
} else if (prop.type === 'SpreadElement') {
prop.type = 'RestElement';
const arg = prop.argument;
this.checkToRestConversion(arg, false);
this.toAssignable(arg, isLHS);
if (!isLast) {
this.raise(Errors.RestTrailingComma, {
at: prop,
});
}
} else {
this.toAssignable(prop, isLHS);
}
}
toAssignableList(exprList, trailingCommaLoc, isLHS) {
const end = exprList.length - 1;
for (let i = 0; i <= end; i++) {
const elt = exprList[i];
if (!elt) continue;
if (elt.type === 'SpreadElement') {
elt.type = 'RestElement';
const arg = elt.argument;
this.checkToRestConversion(arg, true);
this.toAssignable(arg, isLHS);
} else {
this.toAssignable(elt, isLHS);
}
if (elt.type === 'RestElement') {
if (i < end) {
this.raise(Errors.RestTrailingComma, {
at: elt,
});
} else if (trailingCommaLoc) {
this.raise(Errors.RestTrailingComma, {
at: trailingCommaLoc,
});
}
}
}
}
isAssignable(node, isBinding) {
switch (node.type) {
case 'Identifier':
case 'ObjectPattern':
case 'ArrayPattern':
case 'AssignmentPattern':
case 'RestElement':
return true;
case 'ObjectExpression': {
const last = node.properties.length - 1;
return node.properties.every((prop, i) => {
return (
prop.type !== 'ObjectMethod' &&
(i === last || prop.type !== 'SpreadElement') &&
this.isAssignable(prop)
);
});
}
case 'ObjectProperty':
return this.isAssignable(node.value);
case 'SpreadElement':
return this.isAssignable(node.argument);
case 'ArrayExpression':
return node.elements.every(
(element) => element === null || this.isAssignable(element)
);
case 'AssignmentExpression':
return node.operator === '=';
case 'ParenthesizedExpression':
return this.isAssignable(node.expression);
case 'MemberExpression':
case 'OptionalMemberExpression':
return !isBinding;
default:
return false;
}
}
toReferencedList(exprList, isParenthesizedExpr) {
return exprList;
}
toReferencedListDeep(exprList, isParenthesizedExpr) {
this.toReferencedList(exprList, isParenthesizedExpr);
for (const expr of exprList) {
if ((expr == null ? void 0 : expr.type) === 'ArrayExpression') {
this.toReferencedListDeep(expr.elements);
}
}
}
parseSpread(refExpressionErrors, refNeedsArrowPos) {
const node = this.startNode();
this.next();
node.argument = this.parseMaybeAssignAllowIn(
refExpressionErrors,
undefined,
refNeedsArrowPos
);
return this.finishNode(node, 'SpreadElement');
}
parseRestBinding() {
const node = this.startNode();
this.next();
node.argument = this.parseBindingAtom();
return this.finishNode(node, 'RestElement');
}
parseBindingAtom() {
switch (this.state.type) {
case 0: {
const node = this.startNode();
this.next();
node.elements = this.parseBindingList(3, 93, true);
return this.finishNode(node, 'ArrayPattern');
}
case 5:
return this.parseObjectLike(8, true);
}
return this.parseIdentifier();
}
parseBindingList(close, closeCharCode, allowEmpty, allowModifiers) {
const elts = [];
let first = true;
while (!this.eat(close)) {
if (first) {
first = false;
} else {
this.expect(12);
}
if (allowEmpty && this.match(12)) {
elts.push(null);
} else if (this.eat(close)) {
break;
} else if (this.match(21)) {
elts.push(this.parseAssignableListItemTypes(this.parseRestBinding()));
if (!this.checkCommaAfterRest(closeCharCode)) {
this.expect(close);
break;
}
} else {
const decorators = [];
if (this.match(26) && this.hasPlugin('decorators')) {
this.raise(Errors.UnsupportedParameterDecorator, {
at: this.state.startLoc,
});
}
while (this.match(26)) {
decorators.push(this.parseDecorator());
}
elts.push(this.parseAssignableListItem(allowModifiers, decorators));
}
}
return elts;
}
parseBindingRestProperty(prop) {
this.next();
prop.argument = this.parseIdentifier();
this.checkCommaAfterRest(125);
return this.finishNode(prop, 'RestElement');
}
parseBindingProperty() {
const prop = this.startNode();
const { type, start: startPos, startLoc } = this.state;
if (type === 21) {
return this.parseBindingRestProperty(prop);
} else if (type === 134) {
this.expectPlugin('destructuringPrivate', startLoc);
this.classScope.usePrivateName(this.state.value, startLoc);
prop.key = this.parsePrivateName();
} else {
this.parsePropertyName(prop);
}
prop.method = false;
this.parseObjPropValue(prop, startPos, startLoc, false, false, true, false);
return prop;
}
parseAssignableListItem(allowModifiers, decorators) {
const left = this.parseMaybeDefault();
this.parseAssignableListItemTypes(left);
const elt = this.parseMaybeDefault(left.start, left.loc.start, left);
if (decorators.length) {
left.decorators = decorators;
}
return elt;
}
parseAssignableListItemTypes(param) {
return param;
}
parseMaybeDefault(startPos, startLoc, left) {
var _startLoc, _startPos, _left;
startLoc = (_startLoc = startLoc) != null ? _startLoc : this.state.startLoc;
startPos = (_startPos = startPos) != null ? _startPos : this.state.start;
left = (_left = left) != null ? _left : this.parseBindingAtom();
if (!this.eat(29)) return left;
const node = this.startNodeAt(startPos, startLoc);
node.left = left;
node.right = this.parseMaybeAssignAllowIn();
return this.finishNode(node, 'AssignmentPattern');
}
isValidLVal(type, isUnparenthesizedInAssign, binding) {
return getOwn(
{
AssignmentPattern: 'left',
RestElement: 'argument',
ObjectProperty: 'value',
ParenthesizedExpression: 'expression',
ArrayPattern: 'elements',
ObjectPattern: 'properties',
},
type
);
}
checkLVal(
expression,
{
in: ancestor,
binding = BIND_NONE,
checkClashes = false,
strictModeChanged = false,
allowingSloppyLetBinding = !(binding & BIND_SCOPE_LEXICAL),
hasParenthesizedAncestor = false,
}
) {
var _expression$extra;
const type = expression.type;
if (this.isObjectMethod(expression)) return;
if (type === 'MemberExpression') {
if (binding !== BIND_NONE) {
this.raise(Errors.InvalidPropertyBindingPattern, {
at: expression,
});
}
return;
}
if (expression.type === 'Identifier') {
this.checkIdentifier(
expression,
binding,
strictModeChanged,
allowingSloppyLetBinding
);
const { name } = expression;
if (checkClashes) {
if (checkClashes.has(name)) {
this.raise(Errors.ParamDupe, {
at: expression,
});
} else {
checkClashes.add(name);
}
}
return;
}
const validity = this.isValidLVal(
expression.type,
!(
hasParenthesizedAncestor ||
((_expression$extra = expression.extra) != null &&
_expression$extra.parenthesized)
) && ancestor.type === 'AssignmentExpression',
binding
);
if (validity === true) return;
if (validity === false) {
const ParseErrorClass =
binding === BIND_NONE ? Errors.InvalidLhs : Errors.InvalidLhsBinding;
this.raise(ParseErrorClass, {
at: expression,
ancestor:
ancestor.type === 'UpdateExpression' ?
{
type: 'UpdateExpression',
prefix: ancestor.prefix,
}
: {
type: ancestor.type,
},
});
return;
}
const [key, isParenthesizedExpression] =
Array.isArray(validity) ? validity : (
[validity, type === 'ParenthesizedExpression']
);
const nextAncestor =
(
expression.type === 'ArrayPattern' ||
expression.type === 'ObjectPattern' ||
expression.type === 'ParenthesizedExpression'
) ?
expression
: ancestor;
for (const child of [].concat(expression[key])) {
if (child) {
this.checkLVal(child, {
in: nextAncestor,
binding,
checkClashes,
allowingSloppyLetBinding,
strictModeChanged,
hasParenthesizedAncestor: isParenthesizedExpression,
});
}
}
}
checkIdentifier(
at,
bindingType,
strictModeChanged = false,
allowLetBinding = !(bindingType & BIND_SCOPE_LEXICAL)
) {
if (
this.state.strict &&
(strictModeChanged ?
isStrictBindReservedWord(at.name, this.inModule)
: isStrictBindOnlyReservedWord(at.name))
) {
if (bindingType === BIND_NONE) {
this.raise(Errors.StrictEvalArguments, {
at,
referenceName: at.name,
});
} else {
this.raise(Errors.StrictEvalArgumentsBinding, {
at,
bindingName: at.name,
});
}
}
if (!allowLetBinding && at.name === 'let') {
this.raise(Errors.LetInLexicalBinding, {
at,
});
}
if (!(bindingType & BIND_NONE)) {
this.declareNameFromIdentifier(at, bindingType);
}
}
declareNameFromIdentifier(identifier, binding) {
this.scope.declareName(identifier.name, binding, identifier.loc.start);
}
checkToRestConversion(node, allowPattern) {
switch (node.type) {
case 'ParenthesizedExpression':
this.checkToRestConversion(node.expression, allowPattern);
break;
case 'Identifier':
case 'MemberExpression':
break;
case 'ArrayExpression':
case 'ObjectExpression':
if (allowPattern) break;
default:
this.raise(Errors.InvalidRestAssignmentPattern, {
at: node,
});
}
}
checkCommaAfterRest(close) {
if (!this.match(12)) {
return false;
}
this.raise(
this.lookaheadCharCode() === close ?
Errors.RestTrailingComma
: Errors.ElementAfterRest,
{
at: this.state.startLoc,
}
);
return true;
}
}
class ExpressionParser extends LValParser {
checkProto(prop, isRecord, protoRef, refExpressionErrors) {
if (
prop.type === 'SpreadElement' ||
this.isObjectMethod(prop) ||
prop.computed ||
prop.shorthand
) {
return;
}
const key = prop.key;
const name = key.type === 'Identifier' ? key.name : key.value;
if (name === '__proto__') {
if (isRecord) {
this.raise(Errors.RecordNoProto, {
at: key,
});
return;
}
if (protoRef.used) {
if (refExpressionErrors) {
if (refExpressionErrors.doubleProtoLoc === null) {
refExpressionErrors.doubleProtoLoc = key.loc.start;
}
} else {
this.raise(Errors.DuplicateProto, {
at: key,
});
}
}
protoRef.used = true;
}
}
shouldExitDescending(expr, potentialArrowAt) {
return (
expr.type === 'ArrowFunctionExpression' && expr.start === potentialArrowAt
);
}
getExpression() {
this.enterInitialScopes();
this.nextToken();
const expr = this.parseExpression();
if (!this.match(135)) {
this.unexpected();
}
this.finalizeRemainingComments();
expr.comments = this.state.comments;
expr.errors = this.state.errors;
if (this.options.tokens) {
expr.tokens = this.tokens;
}
return expr;
}
parseExpression(disallowIn, refExpressionErrors) {
if (disallowIn) {
return this.disallowInAnd(() =>
this.parseExpressionBase(refExpressionErrors)
);
}
return this.allowInAnd(() => this.parseExpressionBase(refExpressionErrors));
}
parseExpressionBase(refExpressionErrors) {
const startPos = this.state.start;
const startLoc = this.state.startLoc;
const expr = this.parseMaybeAssign(refExpressionErrors);
if (this.match(12)) {
const node = this.startNodeAt(startPos, startLoc);
node.expressions = [expr];
while (this.eat(12)) {
node.expressions.push(this.parseMaybeAssign(refExpressionErrors));
}
this.toReferencedList(node.expressions);
return this.finishNode(node, 'SequenceExpression');
}
return expr;
}
parseMaybeAssignDisallowIn(refExpressionErrors, afterLeftParse) {
return this.disallowInAnd(() =>
this.parseMaybeAssign(refExpressionErrors, afterLeftParse)
);
}
parseMaybeAssignAllowIn(refExpressionErrors, afterLeftParse) {
return this.allowInAnd(() =>
this.parseMaybeAssign(refExpressionErrors, afterLeftParse)
);
}
setOptionalParametersError(refExpressionErrors, resultError) {
var _resultError$loc;
refExpressionErrors.optionalParametersLoc =
(
(_resultError$loc = resultError == null ? void 0 : resultError.loc) !=
null
) ?
_resultError$loc
: this.state.startLoc;
}
parseMaybeAssign(refExpressionErrors, afterLeftParse) {
const startPos = this.state.start;
const startLoc = this.state.startLoc;
if (this.isContextual(105)) {
if (this.prodParam.hasYield) {
let left = this.parseYield();
if (afterLeftParse) {
left = afterLeftParse.call(this, left, startPos, startLoc);
}
return left;
}
}
let ownExpressionErrors;
if (refExpressionErrors) {
ownExpressionErrors = false;
} else {
refExpressionErrors = new ExpressionErrors();
ownExpressionErrors = true;
}
const { type } = this.state;
if (type === 10 || tokenIsIdentifier(type)) {
this.state.potentialArrowAt = this.state.start;
}
let left = this.parseMaybeConditional(refExpressionErrors);
if (afterLeftParse) {
left = afterLeftParse.call(this, left, startPos, startLoc);
}
if (tokenIsAssignment(this.state.type)) {
const node = this.startNodeAt(startPos, startLoc);
const operator = this.state.value;
node.operator = operator;
if (this.match(29)) {
this.toAssignable(left, true);
node.left = left;
if (
refExpressionErrors.doubleProtoLoc != null &&
refExpressionErrors.doubleProtoLoc.index >= startPos
) {
refExpressionErrors.doubleProtoLoc = null;
}
if (
refExpressionErrors.shorthandAssignLoc != null &&
refExpressionErrors.shorthandAssignLoc.index >= startPos
) {
refExpressionErrors.shorthandAssignLoc = null;
}
if (
refExpressionErrors.privateKeyLoc != null &&
refExpressionErrors.privateKeyLoc.index >= startPos
) {
this.checkDestructuringPrivate(refExpressionErrors);
refExpressionErrors.privateKeyLoc = null;
}
} else {
node.left = left;
}
this.next();
node.right = this.parseMaybeAssign();
this.checkLVal(left, {
in: this.finishNode(node, 'AssignmentExpression'),
});
return node;
} else if (ownExpressionErrors) {
this.checkExpressionErrors(refExpressionErrors, true);
}
return left;
}
parseMaybeConditional(refExpressionErrors) {
const startPos = this.state.start;
const startLoc = this.state.startLoc;
const potentialArrowAt = this.state.potentialArrowAt;
const expr = this.parseExprOps(refExpressionErrors);
if (this.shouldExitDescending(expr, potentialArrowAt)) {
return expr;
}
return this.parseConditional(expr, startPos, startLoc, refExpressionErrors);
}
parseConditional(expr, startPos, startLoc, refExpressionErrors) {
if (this.eat(17)) {
const node = this.startNodeAt(startPos, startLoc);
node.test = expr;
node.consequent = this.parseMaybeAssignAllowIn();
this.expect(14);
node.alternate = this.parseMaybeAssign();
return this.finishNode(node, 'ConditionalExpression');
}
return expr;
}
parseMaybeUnaryOrPrivate(refExpressionErrors) {
return this.match(134) ?
this.parsePrivateName()
: this.parseMaybeUnary(refExpressionErrors);
}
parseExprOps(refExpressionErrors) {
const startPos = this.state.start;
const startLoc = this.state.startLoc;
const potentialArrowAt = this.state.potentialArrowAt;
const expr = this.parseMaybeUnaryOrPrivate(refExpressionErrors);
if (this.shouldExitDescending(expr, potentialArrowAt)) {
return expr;
}
return this.parseExprOp(expr, startPos, startLoc, -1);
}
parseExprOp(left, leftStartPos, leftStartLoc, minPrec) {
if (this.isPrivateName(left)) {
const value = this.getPrivateNameSV(left);
if (
minPrec >= tokenOperatorPrecedence(58) ||
!this.prodParam.hasIn ||
!this.match(58)
) {
this.raise(Errors.PrivateInExpectedIn, {
at: left,
identifierName: value,
});
}
this.classScope.usePrivateName(value, left.loc.start);
}
const op = this.state.type;
if (tokenIsOperator(op) && (this.prodParam.hasIn || !this.match(58))) {
let prec = tokenOperatorPrecedence(op);
if (prec > minPrec) {
if (op === 39) {
this.expectPlugin('pipelineOperator');
if (this.state.inFSharpPipelineDirectBody) {
return left;
}
this.checkPipelineAtInfixOperator(left, leftStartLoc);
}
const node = this.startNodeAt(leftStartPos, leftStartLoc);
node.left = left;
node.operator = this.state.value;
const logical = op === 41 || op === 42;
const coalesce = op === 40;
if (coalesce) {
prec = tokenOperatorPrecedence(42);
}
this.next();
if (
op === 39 &&
this.hasPlugin([
'pipelineOperator',
{
proposal: 'minimal',
},
])
) {
if (this.state.type === 96 && this.prodParam.hasAwait) {
throw this.raise(Errors.UnexpectedAwaitAfterPipelineBody, {
at: this.state.startLoc,
});
}
}
node.right = this.parseExprOpRightExpr(op, prec);
this.finishNode(
node,
logical || coalesce ? 'LogicalExpression' : 'BinaryExpression'
);
const nextOp = this.state.type;
if (
(coalesce && (nextOp === 41 || nextOp === 42)) ||
(logical && nextOp === 40)
) {
throw this.raise(Errors.MixingCoalesceWithLogical, {
at: this.state.startLoc,
});
}
return this.parseExprOp(node, leftStartPos, leftStartLoc, minPrec);
}
}
return left;
}
parseExprOpRightExpr(op, prec) {
const startPos = this.state.start;
const startLoc = this.state.startLoc;
switch (op) {
case 39:
switch (this.getPluginOption('pipelineOperator', 'proposal')) {
case 'hack':
return this.withTopicBindingContext(() => {
return this.parseHackPipeBody();
});
case 'smart':
return this.withTopicBindingContext(() => {
if (this.prodParam.hasYield && this.isContextual(105)) {
throw this.raise(Errors.PipeBodyIsTighter, {
at: this.state.startLoc,
});
}
return this.parseSmartPipelineBodyInStyle(
this.parseExprOpBaseRightExpr(op, prec),
startPos,
startLoc
);
});
case 'fsharp':
return this.withSoloAwaitPermittingContext(() => {
return this.parseFSharpPipelineBody(prec);
});
}
default:
return this.parseExprOpBaseRightExpr(op, prec);
}
}
parseExprOpBaseRightExpr(op, prec) {
const startPos = this.state.start;
const startLoc = this.state.startLoc;
return this.parseExprOp(
this.parseMaybeUnaryOrPrivate(),
startPos,
startLoc,
tokenIsRightAssociative(op) ? prec - 1 : prec
);
}
parseHackPipeBody() {
var _body$extra;
const { startLoc } = this.state;
const body = this.parseMaybeAssign();
const requiredParentheses = UnparenthesizedPipeBodyDescriptions.has(
body.type
);
if (
requiredParentheses &&
!((_body$extra = body.extra) != null && _body$extra.parenthesized)
) {
this.raise(Errors.PipeUnparenthesizedBody, {
at: startLoc,
type: body.type,
});
}
if (!this.topicReferenceWasUsedInCurrentContext()) {
this.raise(Errors.PipeTopicUnused, {
at: startLoc,
});
}
return body;
}
checkExponentialAfterUnary(node) {
if (this.match(57)) {
this.raise(Errors.UnexpectedTokenUnaryExponentiation, {
at: node.argument,
});
}
}
parseMaybeUnary(refExpressionErrors, sawUnary) {
const startPos = this.state.start;
const startLoc = this.state.startLoc;
const isAwait = this.isContextual(96);
if (isAwait && this.isAwaitAllowed()) {
this.next();
const expr = this.parseAwait(startPos, startLoc);
if (!sawUnary) this.checkExponentialAfterUnary(expr);
return expr;
}
const update = this.match(34);
const node = this.startNode();
if (tokenIsPrefix(this.state.type)) {
node.operator = this.state.value;
node.prefix = true;
if (this.match(72)) {
this.expectPlugin('throwExpressions');
}
const isDelete = this.match(89);
this.next();
node.argument = this.parseMaybeUnary(null, true);
this.checkExpressionErrors(refExpressionErrors, true);
if (this.state.strict && isDelete) {
const arg = node.argument;
if (arg.type === 'Identifier') {
this.raise(Errors.StrictDelete, {
at: node,
});
} else if (this.hasPropertyAsPrivateName(arg)) {
this.raise(Errors.DeletePrivateField, {
at: node,
});
}
}
if (!update) {
if (!sawUnary) this.checkExponentialAfterUnary(node);
return this.finishNode(node, 'UnaryExpression');
}
}
const expr = this.parseUpdate(node, update, refExpressionErrors);
if (isAwait) {
const { type } = this.state;
const startsExpr =
this.hasPlugin('v8intrinsic') ?
tokenCanStartExpression(type)
: tokenCanStartExpression(type) && !this.match(54);
if (startsExpr && !this.isAmbiguousAwait()) {
this.raiseOverwrite(Errors.AwaitNotInAsyncContext, {
at: startLoc,
});
return this.parseAwait(startPos, startLoc);
}
}
return expr;
}
parseUpdate(node, update, refExpressionErrors) {
if (update) {
this.checkLVal(node.argument, {
in: this.finishNode(node, 'UpdateExpression'),
});
return node;
}
const startPos = this.state.start;
const startLoc = this.state.startLoc;
let expr = this.parseExprSubscripts(refExpressionErrors);
if (this.checkExpressionErrors(refExpressionErrors, false)) return expr;
while (tokenIsPostfix(this.state.type) && !this.canInsertSemicolon()) {
const node = this.startNodeAt(startPos, startLoc);
node.operator = this.state.value;
node.prefix = false;
node.argument = expr;
this.next();
this.checkLVal(expr, {
in: (expr = this.finishNode(node, 'UpdateExpression')),
});
}
return expr;
}
parseExprSubscripts(refExpressionErrors) {
const startPos = this.state.start;
const startLoc = this.state.startLoc;
const potentialArrowAt = this.state.potentialArrowAt;
const expr = this.parseExprAtom(refExpressionErrors);
if (this.shouldExitDescending(expr, potentialArrowAt)) {
return expr;
}
return this.parseSubscripts(expr, startPos, startLoc);
}
parseSubscripts(base, startPos, startLoc, noCalls) {
const state = {
optionalChainMember: false,
maybeAsyncArrow: this.atPossibleAsyncArrow(base),
stop: false,
};
do {
base = this.parseSubscript(base, startPos, startLoc, noCalls, state);
state.maybeAsyncArrow = false;
} while (!state.stop);
return base;
}
parseSubscript(base, startPos, startLoc, noCalls, state) {
const { type } = this.state;
if (!noCalls && type === 15) {
return this.parseBind(base, startPos, startLoc, noCalls, state);
} else if (tokenIsTemplate(type)) {
return this.parseTaggedTemplateExpression(
base,
startPos,
startLoc,
state
);
}
let optional = false;
if (type === 18) {
if (noCalls && this.lookaheadCharCode() === 40) {
state.stop = true;
return base;
}
state.optionalChainMember = optional = true;
this.next();
}
if (!noCalls && this.match(10)) {
return this.parseCoverCallAndAsyncArrowHead(
base,
startPos,
startLoc,
state,
optional
);
} else {
const computed = this.eat(0);
if (computed || optional || this.eat(16)) {
return this.parseMember(
base,
startPos,
startLoc,
state,
computed,
optional
);
} else {
state.stop = true;
return base;
}
}
}
parseMember(base, startPos, startLoc, state, computed, optional) {
const node = this.startNodeAt(startPos, startLoc);
node.object = base;
node.computed = computed;
if (computed) {
node.property = this.parseExpression();
this.expect(3);
} else if (this.match(134)) {
if (base.type === 'Super') {
this.raise(Errors.SuperPrivateField, {
at: startLoc,
});
}
this.classScope.usePrivateName(this.state.value, this.state.startLoc);
node.property = this.parsePrivateName();
} else {
node.property = this.parseIdentifier(true);
}
if (state.optionalChainMember) {
node.optional = optional;
return this.finishNode(node, 'OptionalMemberExpression');
} else {
return this.finishNode(node, 'MemberExpression');
}
}
parseBind(base, startPos, startLoc, noCalls, state) {
const node = this.startNodeAt(startPos, startLoc);
node.object = base;
this.next();
node.callee = this.parseNoCallExpr();
state.stop = true;
return this.parseSubscripts(
this.finishNode(node, 'BindExpression'),
startPos,
startLoc,
noCalls
);
}
parseCoverCallAndAsyncArrowHead(base, startPos, startLoc, state, optional) {
const oldMaybeInArrowParameters = this.state.maybeInArrowParameters;
let refExpressionErrors = null;
this.state.maybeInArrowParameters = true;
this.next();
let node = this.startNodeAt(startPos, startLoc);
node.callee = base;
const { maybeAsyncArrow, optionalChainMember } = state;
if (maybeAsyncArrow) {
this.expressionScope.enter(newAsyncArrowScope());
refExpressionErrors = new ExpressionErrors();
}
if (optionalChainMember) {
node.optional = optional;
}
if (optional) {
node.arguments = this.parseCallExpressionArguments(11);
} else {
node.arguments = this.parseCallExpressionArguments(
11,
base.type === 'Import',
base.type !== 'Super',
node,
refExpressionErrors
);
}
this.finishCallExpression(node, optionalChainMember);
if (maybeAsyncArrow && this.shouldParseAsyncArrow() && !optional) {
state.stop = true;
this.checkDestructuringPrivate(refExpressionErrors);
this.expressionScope.validateAsPattern();
this.expressionScope.exit();
node = this.parseAsyncArrowFromCallExpression(
this.startNodeAt(startPos, startLoc),
node
);
} else {
if (maybeAsyncArrow) {
this.checkExpressionErrors(refExpressionErrors, true);
this.expressionScope.exit();
}
this.toReferencedArguments(node);
}
this.state.maybeInArrowParameters = oldMaybeInArrowParameters;
return node;
}
toReferencedArguments(node, isParenthesizedExpr) {
this.toReferencedListDeep(node.arguments, isParenthesizedExpr);
}
parseTaggedTemplateExpression(base, startPos, startLoc, state) {
const node = this.startNodeAt(startPos, startLoc);
node.tag = base;
node.quasi = this.parseTemplate(true);
if (state.optionalChainMember) {
this.raise(Errors.OptionalChainingNoTemplate, {
at: startLoc,
});
}
return this.finishNode(node, 'TaggedTemplateExpression');
}
atPossibleAsyncArrow(base) {
return (
base.type === 'Identifier' &&
base.name === 'async' &&
this.state.lastTokEndLoc.index === base.end &&
!this.canInsertSemicolon() &&
base.end - base.start === 5 &&
base.start === this.state.potentialArrowAt
);
}
finishCallExpression(node, optional) {
if (node.callee.type === 'Import') {
if (node.arguments.length === 2) {
{
if (!this.hasPlugin('moduleAttributes')) {
this.expectPlugin('importAssertions');
}
}
}
if (node.arguments.length === 0 || node.arguments.length > 2) {
this.raise(Errors.ImportCallArity, {
at: node,
maxArgumentCount:
(
this.hasPlugin('importAssertions') ||
this.hasPlugin('moduleAttributes')
) ?
2
: 1,
});
} else {
for (const arg of node.arguments) {
if (arg.type === 'SpreadElement') {
this.raise(Errors.ImportCallSpreadArgument, {
at: arg,
});
}
}
}
}
return this.finishNode(
node,
optional ? 'OptionalCallExpression' : 'CallExpression'
);
}
parseCallExpressionArguments(
close,
dynamicImport,
allowPlaceholder,
nodeForExtra,
refExpressionErrors
) {
const elts = [];
let first = true;
const oldInFSharpPipelineDirectBody = this.state.inFSharpPipelineDirectBody;
this.state.inFSharpPipelineDirectBody = false;
while (!this.eat(close)) {
if (first) {
first = false;
} else {
this.expect(12);
if (this.match(close)) {
if (
dynamicImport &&
!this.hasPlugin('importAssertions') &&
!this.hasPlugin('moduleAttributes')
) {
this.raise(Errors.ImportCallArgumentTrailingComma, {
at: this.state.lastTokStartLoc,
});
}
if (nodeForExtra) {
this.addTrailingCommaExtraToNode(nodeForExtra);
}
this.next();
break;
}
}
elts.push(
this.parseExprListItem(false, refExpressionErrors, allowPlaceholder)
);
}
this.state.inFSharpPipelineDirectBody = oldInFSharpPipelineDirectBody;
return elts;
}
shouldParseAsyncArrow() {
return this.match(19) && !this.canInsertSemicolon();
}
parseAsyncArrowFromCallExpression(node, call) {
var _call$extra;
this.resetPreviousNodeTrailingComments(call);
this.expect(19);
this.parseArrowExpression(
node,
call.arguments,
true,
(_call$extra = call.extra) == null ? void 0 : _call$extra.trailingCommaLoc
);
if (call.innerComments) {
setInnerComments(node, call.innerComments);
}
if (call.callee.trailingComments) {
setInnerComments(node, call.callee.trailingComments);
}
return node;
}
parseNoCallExpr() {
const startPos = this.state.start;
const startLoc = this.state.startLoc;
return this.parseSubscripts(this.parseExprAtom(), startPos, startLoc, true);
}
parseExprAtom(refExpressionErrors) {
let node;
const { type } = this.state;
switch (type) {
case 79:
return this.parseSuper();
case 83:
node = this.startNode();
this.next();
if (this.match(16)) {
return this.parseImportMetaProperty(node);
}
if (!this.match(10)) {
this.raise(Errors.UnsupportedImport, {
at: this.state.lastTokStartLoc,
});
}
return this.finishNode(node, 'Import');
case 78:
node = this.startNode();
this.next();
return this.finishNode(node, 'ThisExpression');
case 90: {
return this.parseDo(this.startNode(), false);
}
case 56:
case 31: {
this.readRegexp();
return this.parseRegExpLiteral(this.state.value);
}
case 130:
return this.parseNumericLiteral(this.state.value);
case 131:
return this.parseBigIntLiteral(this.state.value);
case 132:
return this.parseDecimalLiteral(this.state.value);
case 129:
return this.parseStringLiteral(this.state.value);
case 84:
return this.parseNullLiteral();
case 85:
return this.parseBooleanLiteral(true);
case 86:
return this.parseBooleanLiteral(false);
case 10: {
const canBeArrow = this.state.potentialArrowAt === this.state.start;
return this.parseParenAndDistinguishExpression(canBeArrow);
}
case 2:
case 1: {
return this.parseArrayLike(this.state.type === 2 ? 4 : 3, false, true);
}
case 0: {
return this.parseArrayLike(3, true, false, refExpressionErrors);
}
case 6:
case 7: {
return this.parseObjectLike(this.state.type === 6 ? 9 : 8, false, true);
}
case 5: {
return this.parseObjectLike(8, false, false, refExpressionErrors);
}
case 68:
return this.parseFunctionOrFunctionSent();
case 26:
this.parseDecorators();
case 80:
node = this.startNode();
this.takeDecorators(node);
return this.parseClass(node, false);
case 77:
return this.parseNewOrNewTarget();
case 25:
case 24:
return this.parseTemplate(false);
case 15: {
node = this.startNode();
this.next();
node.object = null;
const callee = (node.callee = this.parseNoCallExpr());
if (callee.type === 'MemberExpression') {
return this.finishNode(node, 'BindExpression');
} else {
throw this.raise(Errors.UnsupportedBind, {
at: callee,
});
}
}
case 134: {
this.raise(Errors.PrivateInExpectedIn, {
at: this.state.startLoc,
identifierName: this.state.value,
});
return this.parsePrivateName();
}
case 33: {
return this.parseTopicReferenceThenEqualsSign(54, '%');
}
case 32: {
return this.parseTopicReferenceThenEqualsSign(44, '^');
}
case 37:
case 38: {
return this.parseTopicReference('hack');
}
case 44:
case 54:
case 27: {
const pipeProposal = this.getPluginOption(
'pipelineOperator',
'proposal'
);
if (pipeProposal) {
return this.parseTopicReference(pipeProposal);
} else {
throw this.unexpected();
}
}
case 47: {
const lookaheadCh = this.input.codePointAt(this.nextTokenStart());
if (isIdentifierStart(lookaheadCh) || lookaheadCh === 62) {
this.expectOnePlugin(['jsx', 'flow', 'typescript']);
break;
} else {
throw this.unexpected();
}
}
default:
if (tokenIsIdentifier(type)) {
if (
this.isContextual(123) &&
this.lookaheadCharCode() === 123 &&
!this.hasFollowingLineBreak()
) {
return this.parseModuleExpression();
}
const canBeArrow = this.state.potentialArrowAt === this.state.start;
const containsEsc = this.state.containsEsc;
const id = this.parseIdentifier();
if (
!containsEsc &&
id.name === 'async' &&
!this.canInsertSemicolon()
) {
const { type } = this.state;
if (type === 68) {
this.resetPreviousNodeTrailingComments(id);
this.next();
return this.parseFunction(
this.startNodeAtNode(id),
undefined,
true
);
} else if (tokenIsIdentifier(type)) {
if (this.lookaheadCharCode() === 61) {
return this.parseAsyncArrowUnaryFunction(
this.startNodeAtNode(id)
);
} else {
return id;
}
} else if (type === 90) {
this.resetPreviousNodeTrailingComments(id);
return this.parseDo(this.startNodeAtNode(id), true);
}
}
if (canBeArrow && this.match(19) && !this.canInsertSemicolon()) {
this.next();
return this.parseArrowExpression(
this.startNodeAtNode(id),
[id],
false
);
}
return id;
} else {
throw this.unexpected();
}
}
}
parseTopicReferenceThenEqualsSign(topicTokenType, topicTokenValue) {
const pipeProposal = this.getPluginOption('pipelineOperator', 'proposal');
if (pipeProposal) {
this.state.type = topicTokenType;
this.state.value = topicTokenValue;
this.state.pos--;
this.state.end--;
this.state.endLoc = createPositionWithColumnOffset(this.state.endLoc, -1);
return this.parseTopicReference(pipeProposal);
} else {
throw this.unexpected();
}
}
parseTopicReference(pipeProposal) {
const node = this.startNode();
const startLoc = this.state.startLoc;
const tokenType = this.state.type;
this.next();
return this.finishTopicReference(node, startLoc, pipeProposal, tokenType);
}
finishTopicReference(node, startLoc, pipeProposal, tokenType) {
if (
this.testTopicReferenceConfiguration(pipeProposal, startLoc, tokenType)
) {
const nodeType =
pipeProposal === 'smart' ?
'PipelinePrimaryTopicReference'
: 'TopicReference';
if (!this.topicReferenceIsAllowedInCurrentContext()) {
this.raise(
pipeProposal === 'smart' ?
Errors.PrimaryTopicNotAllowed
: Errors.PipeTopicUnbound,
{
at: startLoc,
}
);
}
this.registerTopicReference();
return this.finishNode(node, nodeType);
} else {
throw this.raise(Errors.PipeTopicUnconfiguredToken, {
at: startLoc,
token: tokenLabelName(tokenType),
});
}
}
testTopicReferenceConfiguration(pipeProposal, startLoc, tokenType) {
switch (pipeProposal) {
case 'hack': {
return this.hasPlugin([
'pipelineOperator',
{
topicToken: tokenLabelName(tokenType),
},
]);
}
case 'smart':
return tokenType === 27;
default:
throw this.raise(Errors.PipeTopicRequiresHackPipes, {
at: startLoc,
});
}
}
parseAsyncArrowUnaryFunction(node) {
this.prodParam.enter(functionFlags(true, this.prodParam.hasYield));
const params = [this.parseIdentifier()];
this.prodParam.exit();
if (this.hasPrecedingLineBreak()) {
this.raise(Errors.LineTerminatorBeforeArrow, {
at: this.state.curPosition(),
});
}
this.expect(19);
this.parseArrowExpression(node, params, true);
return node;
}
parseDo(node, isAsync) {
this.expectPlugin('doExpressions');
if (isAsync) {
this.expectPlugin('asyncDoExpressions');
}
node.async = isAsync;
this.next();
const oldLabels = this.state.labels;
this.state.labels = [];
if (isAsync) {
this.prodParam.enter(PARAM_AWAIT);
node.body = this.parseBlock();
this.prodParam.exit();
} else {
node.body = this.parseBlock();
}
this.state.labels = oldLabels;
return this.finishNode(node, 'DoExpression');
}
parseSuper() {
const node = this.startNode();
this.next();
if (
this.match(10) &&
!this.scope.allowDirectSuper &&
!this.options.allowSuperOutsideMethod
) {
this.raise(Errors.SuperNotAllowed, {
at: node,
});
} else if (
!this.scope.allowSuper &&
!this.options.allowSuperOutsideMethod
) {
this.raise(Errors.UnexpectedSuper, {
at: node,
});
}
if (!this.match(10) && !this.match(0) && !this.match(16)) {
this.raise(Errors.UnsupportedSuper, {
at: node,
});
}
return this.finishNode(node, 'Super');
}
parsePrivateName() {
const node = this.startNode();
const id = this.startNodeAt(
this.state.start + 1,
new Position(
this.state.curLine,
this.state.start + 1 - this.state.lineStart,
this.state.start + 1
)
);
const name = this.state.value;
this.next();
node.id = this.createIdentifier(id, name);
return this.finishNode(node, 'PrivateName');
}
parseFunctionOrFunctionSent() {
const node = this.startNode();
this.next();
if (this.prodParam.hasYield && this.match(16)) {
const meta = this.createIdentifier(
this.startNodeAtNode(node),
'function'
);
this.next();
if (this.match(102)) {
this.expectPlugin('functionSent');
} else if (!this.hasPlugin('functionSent')) {
this.unexpected();
}
return this.parseMetaProperty(node, meta, 'sent');
}
return this.parseFunction(node);
}
parseMetaProperty(node, meta, propertyName) {
node.meta = meta;
const containsEsc = this.state.containsEsc;
node.property = this.parseIdentifier(true);
if (node.property.name !== propertyName || containsEsc) {
this.raise(Errors.UnsupportedMetaProperty, {
at: node.property,
target: meta.name,
onlyValidPropertyName: propertyName,
});
}
return this.finishNode(node, 'MetaProperty');
}
parseImportMetaProperty(node) {
const id = this.createIdentifier(this.startNodeAtNode(node), 'import');
this.next();
if (this.isContextual(100)) {
if (!this.inModule) {
this.raise(Errors.ImportMetaOutsideModule, {
at: id,
});
}
this.sawUnambiguousESM = true;
}
return this.parseMetaProperty(node, id, 'meta');
}
parseLiteralAtNode(value, type, node) {
this.addExtra(node, 'rawValue', value);
this.addExtra(node, 'raw', this.input.slice(node.start, this.state.end));
node.value = value;
this.next();
return this.finishNode(node, type);
}
parseLiteral(value, type) {
const node = this.startNode();
return this.parseLiteralAtNode(value, type, node);
}
parseStringLiteral(value) {
return this.parseLiteral(value, 'StringLiteral');
}
parseNumericLiteral(value) {
return this.parseLiteral(value, 'NumericLiteral');
}
parseBigIntLiteral(value) {
return this.parseLiteral(value, 'BigIntLiteral');
}
parseDecimalLiteral(value) {
return this.parseLiteral(value, 'DecimalLiteral');
}
parseRegExpLiteral(value) {
const node = this.parseLiteral(value.value, 'RegExpLiteral');
node.pattern = value.pattern;
node.flags = value.flags;
return node;
}
parseBooleanLiteral(value) {
const node = this.startNode();
node.value = value;
this.next();
return this.finishNode(node, 'BooleanLiteral');
}
parseNullLiteral() {
const node = this.startNode();
this.next();
return this.finishNode(node, 'NullLiteral');
}
parseParenAndDistinguishExpression(canBeArrow) {
const startPos = this.state.start;
const startLoc = this.state.startLoc;
let val;
this.next();
this.expressionScope.enter(newArrowHeadScope());
const oldMaybeInArrowParameters = this.state.maybeInArrowParameters;
const oldInFSharpPipelineDirectBody = this.state.inFSharpPipelineDirectBody;
this.state.maybeInArrowParameters = true;
this.state.inFSharpPipelineDirectBody = false;
const innerStartPos = this.state.start;
const innerStartLoc = this.state.startLoc;
const exprList = [];
const refExpressionErrors = new ExpressionErrors();
let first = true;
let spreadStartLoc;
let optionalCommaStartLoc;
while (!this.match(11)) {
if (first) {
first = false;
} else {
this.expect(
12,
refExpressionErrors.optionalParametersLoc === null ?
null
: refExpressionErrors.optionalParametersLoc
);
if (this.match(11)) {
optionalCommaStartLoc = this.state.startLoc;
break;
}
}
if (this.match(21)) {
const spreadNodeStartPos = this.state.start;
const spreadNodeStartLoc = this.state.startLoc;
spreadStartLoc = this.state.startLoc;
exprList.push(
this.parseParenItem(
this.parseRestBinding(),
spreadNodeStartPos,
spreadNodeStartLoc
)
);
if (!this.checkCommaAfterRest(41)) {
break;
}
} else {
exprList.push(
this.parseMaybeAssignAllowIn(refExpressionErrors, this.parseParenItem)
);
}
}
const innerEndLoc = this.state.lastTokEndLoc;
this.expect(11);
this.state.maybeInArrowParameters = oldMaybeInArrowParameters;
this.state.inFSharpPipelineDirectBody = oldInFSharpPipelineDirectBody;
let arrowNode = this.startNodeAt(startPos, startLoc);
if (
canBeArrow &&
this.shouldParseArrow(exprList) &&
(arrowNode = this.parseArrow(arrowNode))
) {
this.checkDestructuringPrivate(refExpressionErrors);
this.expressionScope.validateAsPattern();
this.expressionScope.exit();
this.parseArrowExpression(arrowNode, exprList, false);
return arrowNode;
}
this.expressionScope.exit();
if (!exprList.length) {
this.unexpected(this.state.lastTokStartLoc);
}
if (optionalCommaStartLoc) this.unexpected(optionalCommaStartLoc);
if (spreadStartLoc) this.unexpected(spreadStartLoc);
this.checkExpressionErrors(refExpressionErrors, true);
this.toReferencedListDeep(exprList, true);
if (exprList.length > 1) {
val = this.startNodeAt(innerStartPos, innerStartLoc);
val.expressions = exprList;
this.finishNode(val, 'SequenceExpression');
this.resetEndLocation(val, innerEndLoc);
} else {
val = exprList[0];
}
return this.wrapParenthesis(startPos, startLoc, val);
}
wrapParenthesis(startPos, startLoc, expression) {
if (!this.options.createParenthesizedExpressions) {
this.addExtra(expression, 'parenthesized', true);
this.addExtra(expression, 'parenStart', startPos);
this.takeSurroundingComments(
expression,
startPos,
this.state.lastTokEndLoc.index
);
return expression;
}
const parenExpression = this.startNodeAt(startPos, startLoc);
parenExpression.expression = expression;
this.finishNode(parenExpression, 'ParenthesizedExpression');
return parenExpression;
}
shouldParseArrow(params) {
return !this.canInsertSemicolon();
}
parseArrow(node) {
if (this.eat(19)) {
return node;
}
}
parseParenItem(node, startPos, startLoc) {
return node;
}
parseNewOrNewTarget() {
const node = this.startNode();
this.next();
if (this.match(16)) {
const meta = this.createIdentifier(this.startNodeAtNode(node), 'new');
this.next();
const metaProp = this.parseMetaProperty(node, meta, 'target');
if (!this.scope.inNonArrowFunction && !this.scope.inClass) {
this.raise(Errors.UnexpectedNewTarget, {
at: metaProp,
});
}
return metaProp;
}
return this.parseNew(node);
}
parseNew(node) {
this.parseNewCallee(node);
if (this.eat(10)) {
const args = this.parseExprList(11);
this.toReferencedList(args);
node.arguments = args;
} else {
node.arguments = [];
}
return this.finishNode(node, 'NewExpression');
}
parseNewCallee(node) {
node.callee = this.parseNoCallExpr();
if (node.callee.type === 'Import') {
this.raise(Errors.ImportCallNotNewExpression, {
at: node.callee,
});
} else if (this.isOptionalChain(node.callee)) {
this.raise(Errors.OptionalChainingNoNew, {
at: this.state.lastTokEndLoc,
});
} else if (this.eat(18)) {
this.raise(Errors.OptionalChainingNoNew, {
at: this.state.startLoc,
});
}
}
parseTemplateElement(isTagged) {
const { start, startLoc, end, value } = this.state;
const elemStart = start + 1;
const elem = this.startNodeAt(
elemStart,
createPositionWithColumnOffset(startLoc, 1)
);
if (value === null) {
if (!isTagged) {
this.raise(Errors.InvalidEscapeSequenceTemplate, {
at: createPositionWithColumnOffset(startLoc, 2),
});
}
}
const isTail = this.match(24);
const endOffset = isTail ? -1 : -2;
const elemEnd = end + endOffset;
elem.value = {
raw: this.input.slice(elemStart, elemEnd).replace(/\r\n?/g, '\n'),
cooked: value === null ? null : value.slice(1, endOffset),
};
elem.tail = isTail;
this.next();
this.finishNode(elem, 'TemplateElement');
this.resetEndLocation(
elem,
createPositionWithColumnOffset(this.state.lastTokEndLoc, endOffset)
);
return elem;
}
parseTemplate(isTagged) {
const node = this.startNode();
node.expressions = [];
let curElt = this.parseTemplateElement(isTagged);
node.quasis = [curElt];
while (!curElt.tail) {
node.expressions.push(this.parseTemplateSubstitution());
this.readTemplateContinuation();
node.quasis.push((curElt = this.parseTemplateElement(isTagged)));
}
return this.finishNode(node, 'TemplateLiteral');
}
parseTemplateSubstitution() {
return this.parseExpression();
}
parseObjectLike(close, isPattern, isRecord, refExpressionErrors) {
if (isRecord) {
this.expectPlugin('recordAndTuple');
}
const oldInFSharpPipelineDirectBody = this.state.inFSharpPipelineDirectBody;
this.state.inFSharpPipelineDirectBody = false;
const propHash = Object.create(null);
let first = true;
const node = this.startNode();
node.properties = [];
this.next();
while (!this.match(close)) {
if (first) {
first = false;
} else {
this.expect(12);
if (this.match(close)) {
this.addTrailingCommaExtraToNode(node);
break;
}
}
let prop;
if (isPattern) {
prop = this.parseBindingProperty();
} else {
prop = this.parsePropertyDefinition(refExpressionErrors);
this.checkProto(prop, isRecord, propHash, refExpressionErrors);
}
if (
isRecord &&
!this.isObjectProperty(prop) &&
prop.type !== 'SpreadElement'
) {
this.raise(Errors.InvalidRecordProperty, {
at: prop,
});
}
if (prop.shorthand) {
this.addExtra(prop, 'shorthand', true);
}
node.properties.push(prop);
}
this.next();
this.state.inFSharpPipelineDirectBody = oldInFSharpPipelineDirectBody;
let type = 'ObjectExpression';
if (isPattern) {
type = 'ObjectPattern';
} else if (isRecord) {
type = 'RecordExpression';
}
return this.finishNode(node, type);
}
addTrailingCommaExtraToNode(node) {
this.addExtra(node, 'trailingComma', this.state.lastTokStart);
this.addExtra(node, 'trailingCommaLoc', this.state.lastTokStartLoc, false);
}
maybeAsyncOrAccessorProp(prop) {
return (
!prop.computed &&
prop.key.type === 'Identifier' &&
(this.isLiteralPropertyName() || this.match(0) || this.match(55))
);
}
parsePropertyDefinition(refExpressionErrors) {
let decorators = [];
if (this.match(26)) {
if (this.hasPlugin('decorators')) {
this.raise(Errors.UnsupportedPropertyDecorator, {
at: this.state.startLoc,
});
}
while (this.match(26)) {
decorators.push(this.parseDecorator());
}
}
const prop = this.startNode();
let isAsync = false;
let isAccessor = false;
let startPos;
let startLoc;
if (this.match(21)) {
if (decorators.length) this.unexpected();
return this.parseSpread();
}
if (decorators.length) {
prop.decorators = decorators;
decorators = [];
}
prop.method = false;
if (refExpressionErrors) {
startPos = this.state.start;
startLoc = this.state.startLoc;
}
let isGenerator = this.eat(55);
this.parsePropertyNamePrefixOperator(prop);
const containsEsc = this.state.containsEsc;
const key = this.parsePropertyName(prop, refExpressionErrors);
if (!isGenerator && !containsEsc && this.maybeAsyncOrAccessorProp(prop)) {
const keyName = key.name;
if (keyName === 'async' && !this.hasPrecedingLineBreak()) {
isAsync = true;
this.resetPreviousNodeTrailingComments(key);
isGenerator = this.eat(55);
this.parsePropertyName(prop);
}
if (keyName === 'get' || keyName === 'set') {
isAccessor = true;
this.resetPreviousNodeTrailingComments(key);
prop.kind = keyName;
if (this.match(55)) {
isGenerator = true;
this.raise(Errors.AccessorIsGenerator, {
at: this.state.curPosition(),
kind: keyName,
});
this.next();
}
this.parsePropertyName(prop);
}
}
this.parseObjPropValue(
prop,
startPos,
startLoc,
isGenerator,
isAsync,
false,
isAccessor,
refExpressionErrors
);
return prop;
}
getGetterSetterExpectedParamCount(method) {
return method.kind === 'get' ? 0 : 1;
}
getObjectOrClassMethodParams(method) {
return method.params;
}
checkGetterSetterParams(method) {
var _params;
const paramCount = this.getGetterSetterExpectedParamCount(method);
const params = this.getObjectOrClassMethodParams(method);
if (params.length !== paramCount) {
this.raise(
method.kind === 'get' ? Errors.BadGetterArity : Errors.BadSetterArity,
{
at: method,
}
);
}
if (
method.kind === 'set' &&
((_params = params[params.length - 1]) == null ?
void 0
: _params.type) === 'RestElement'
) {
this.raise(Errors.BadSetterRestParameter, {
at: method,
});
}
}
parseObjectMethod(prop, isGenerator, isAsync, isPattern, isAccessor) {
if (isAccessor) {
this.parseMethod(prop, isGenerator, false, false, false, 'ObjectMethod');
this.checkGetterSetterParams(prop);
return prop;
}
if (isAsync || isGenerator || this.match(10)) {
if (isPattern) this.unexpected();
prop.kind = 'method';
prop.method = true;
return this.parseMethod(
prop,
isGenerator,
isAsync,
false,
false,
'ObjectMethod'
);
}
}
parseObjectProperty(
prop,
startPos,
startLoc,
isPattern,
refExpressionErrors
) {
prop.shorthand = false;
if (this.eat(14)) {
prop.value =
isPattern ?
this.parseMaybeDefault(this.state.start, this.state.startLoc)
: this.parseMaybeAssignAllowIn(refExpressionErrors);
return this.finishNode(prop, 'ObjectProperty');
}
if (!prop.computed && prop.key.type === 'Identifier') {
this.checkReservedWord(prop.key.name, prop.key.loc.start, true, false);
if (isPattern) {
prop.value = this.parseMaybeDefault(
startPos,
startLoc,
cloneIdentifier(prop.key)
);
} else if (this.match(29)) {
const shorthandAssignLoc = this.state.startLoc;
if (refExpressionErrors != null) {
if (refExpressionErrors.shorthandAssignLoc === null) {
refExpressionErrors.shorthandAssignLoc = shorthandAssignLoc;
}
} else {
this.raise(Errors.InvalidCoverInitializedName, {
at: shorthandAssignLoc,
});
}
prop.value = this.parseMaybeDefault(
startPos,
startLoc,
cloneIdentifier(prop.key)
);
} else {
prop.value = cloneIdentifier(prop.key);
}
prop.shorthand = true;
return this.finishNode(prop, 'ObjectProperty');
}
}
parseObjPropValue(
prop,
startPos,
startLoc,
isGenerator,
isAsync,
isPattern,
isAccessor,
refExpressionErrors
) {
const node =
this.parseObjectMethod(
prop,
isGenerator,
isAsync,
isPattern,
isAccessor
) ||
this.parseObjectProperty(
prop,
startPos,
startLoc,
isPattern,
refExpressionErrors
);
if (!node) this.unexpected();
return node;
}
parsePropertyName(prop, refExpressionErrors) {
if (this.eat(0)) {
prop.computed = true;
prop.key = this.parseMaybeAssignAllowIn();
this.expect(3);
} else {
const { type, value } = this.state;
let key;
if (tokenIsKeywordOrIdentifier(type)) {
key = this.parseIdentifier(true);
} else {
switch (type) {
case 130:
key = this.parseNumericLiteral(value);
break;
case 129:
key = this.parseStringLiteral(value);
break;
case 131:
key = this.parseBigIntLiteral(value);
break;
case 132:
key = this.parseDecimalLiteral(value);
break;
case 134: {
const privateKeyLoc = this.state.startLoc;
if (refExpressionErrors != null) {
if (refExpressionErrors.privateKeyLoc === null) {
refExpressionErrors.privateKeyLoc = privateKeyLoc;
}
} else {
this.raise(Errors.UnexpectedPrivateField, {
at: privateKeyLoc,
});
}
key = this.parsePrivateName();
break;
}
default:
throw this.unexpected();
}
}
prop.key = key;
if (type !== 134) {
prop.computed = false;
}
}
return prop.key;
}
initFunction(node, isAsync) {
node.id = null;
node.generator = false;
node.async = !!isAsync;
}
parseMethod(
node,
isGenerator,
isAsync,
isConstructor,
allowDirectSuper,
type,
inClassScope = false
) {
this.initFunction(node, isAsync);
node.generator = !!isGenerator;
const allowModifiers = isConstructor;
this.scope.enter(
SCOPE_FUNCTION |
SCOPE_SUPER |
(inClassScope ? SCOPE_CLASS : 0) |
(allowDirectSuper ? SCOPE_DIRECT_SUPER : 0)
);
this.prodParam.enter(functionFlags(isAsync, node.generator));
this.parseFunctionParams(node, allowModifiers);
this.parseFunctionBodyAndFinish(node, type, true);
this.prodParam.exit();
this.scope.exit();
return node;
}
parseArrayLike(close, canBePattern, isTuple, refExpressionErrors) {
if (isTuple) {
this.expectPlugin('recordAndTuple');
}
const oldInFSharpPipelineDirectBody = this.state.inFSharpPipelineDirectBody;
this.state.inFSharpPipelineDirectBody = false;
const node = this.startNode();
this.next();
node.elements = this.parseExprList(
close,
!isTuple,
refExpressionErrors,
node
);
this.state.inFSharpPipelineDirectBody = oldInFSharpPipelineDirectBody;
return this.finishNode(
node,
isTuple ? 'TupleExpression' : 'ArrayExpression'
);
}
parseArrowExpression(node, params, isAsync, trailingCommaLoc) {
this.scope.enter(SCOPE_FUNCTION | SCOPE_ARROW);
let flags = functionFlags(isAsync, false);
if (!this.match(5) && this.prodParam.hasIn) {
flags |= PARAM_IN;
}
this.prodParam.enter(flags);
this.initFunction(node, isAsync);
const oldMaybeInArrowParameters = this.state.maybeInArrowParameters;
if (params) {
this.state.maybeInArrowParameters = true;
this.setArrowFunctionParameters(node, params, trailingCommaLoc);
}
this.state.maybeInArrowParameters = false;
this.parseFunctionBody(node, true);
this.prodParam.exit();
this.scope.exit();
this.state.maybeInArrowParameters = oldMaybeInArrowParameters;
return this.finishNode(node, 'ArrowFunctionExpression');
}
setArrowFunctionParameters(node, params, trailingCommaLoc) {
this.toAssignableList(params, trailingCommaLoc, false);
node.params = params;
}
parseFunctionBodyAndFinish(node, type, isMethod = false) {
this.parseFunctionBody(node, false, isMethod);
this.finishNode(node, type);
}
parseFunctionBody(node, allowExpression, isMethod = false) {
const isExpression = allowExpression && !this.match(5);
this.expressionScope.enter(newExpressionScope());
if (isExpression) {
node.body = this.parseMaybeAssign();
this.checkParams(node, false, allowExpression, false);
} else {
const oldStrict = this.state.strict;
const oldLabels = this.state.labels;
this.state.labels = [];
this.prodParam.enter(this.prodParam.currentFlags() | PARAM_RETURN);
node.body = this.parseBlock(true, false, (hasStrictModeDirective) => {
const nonSimple = !this.isSimpleParamList(node.params);
if (hasStrictModeDirective && nonSimple) {
this.raise(Errors.IllegalLanguageModeDirective, {
at:
(
(node.kind === 'method' || node.kind === 'constructor') &&
!!node.key
) ?
node.key.loc.end
: node,
});
}
const strictModeChanged = !oldStrict && this.state.strict;
this.checkParams(
node,
!this.state.strict && !allowExpression && !isMethod && !nonSimple,
allowExpression,
strictModeChanged
);
if (this.state.strict && node.id) {
this.checkIdentifier(node.id, BIND_OUTSIDE, strictModeChanged);
}
});
this.prodParam.exit();
this.state.labels = oldLabels;
}
this.expressionScope.exit();
}
isSimpleParameter(node) {
return node.type === 'Identifier';
}
isSimpleParamList(params) {
for (let i = 0, len = params.length; i < len; i++) {
if (!this.isSimpleParameter(params[i])) return false;
}
return true;
}
checkParams(
node,
allowDuplicates,
isArrowFunction,
strictModeChanged = true
) {
const checkClashes = !allowDuplicates && new Set();
const formalParameters = {
type: 'FormalParameters',
};
for (const param of node.params) {
this.checkLVal(param, {
in: formalParameters,
binding: BIND_VAR,
checkClashes,
strictModeChanged,
});
}
}
parseExprList(close, allowEmpty, refExpressionErrors, nodeForExtra) {
const elts = [];
let first = true;
while (!this.eat(close)) {
if (first) {
first = false;
} else {
this.expect(12);
if (this.match(close)) {
if (nodeForExtra) {
this.addTrailingCommaExtraToNode(nodeForExtra);
}
this.next();
break;
}
}
elts.push(this.parseExprListItem(allowEmpty, refExpressionErrors));
}
return elts;
}
parseExprListItem(allowEmpty, refExpressionErrors, allowPlaceholder) {
let elt;
if (this.match(12)) {
if (!allowEmpty) {
this.raise(Errors.UnexpectedToken, {
at: this.state.curPosition(),
unexpected: ',',
});
}
elt = null;
} else if (this.match(21)) {
const spreadNodeStartPos = this.state.start;
const spreadNodeStartLoc = this.state.startLoc;
elt = this.parseParenItem(
this.parseSpread(refExpressionErrors),
spreadNodeStartPos,
spreadNodeStartLoc
);
} else if (this.match(17)) {
this.expectPlugin('partialApplication');
if (!allowPlaceholder) {
this.raise(Errors.UnexpectedArgumentPlaceholder, {
at: this.state.startLoc,
});
}
const node = this.startNode();
this.next();
elt = this.finishNode(node, 'ArgumentPlaceholder');
} else {
elt = this.parseMaybeAssignAllowIn(
refExpressionErrors,
this.parseParenItem
);
}
return elt;
}
parseIdentifier(liberal) {
const node = this.startNode();
const name = this.parseIdentifierName(node.start, liberal);
return this.createIdentifier(node, name);
}
createIdentifier(node, name) {
node.name = name;
node.loc.identifierName = name;
return this.finishNode(node, 'Identifier');
}
parseIdentifierName(pos, liberal) {
let name;
const { startLoc, type } = this.state;
if (tokenIsKeywordOrIdentifier(type)) {
name = this.state.value;
} else {
throw this.unexpected();
}
const tokenIsKeyword = tokenKeywordOrIdentifierIsKeyword(type);
if (liberal) {
if (tokenIsKeyword) {
this.replaceToken(128);
}
} else {
this.checkReservedWord(name, startLoc, tokenIsKeyword, false);
}
this.next();
return name;
}
checkReservedWord(word, startLoc, checkKeywords, isBinding) {
if (word.length > 10) {
return;
}
if (!canBeReservedWord(word)) {
return;
}
if (word === 'yield') {
if (this.prodParam.hasYield) {
this.raise(Errors.YieldBindingIdentifier, {
at: startLoc,
});
return;
}
} else if (word === 'await') {
if (this.prodParam.hasAwait) {
this.raise(Errors.AwaitBindingIdentifier, {
at: startLoc,
});
return;
}
if (this.scope.inStaticBlock) {
this.raise(Errors.AwaitBindingIdentifierInStaticBlock, {
at: startLoc,
});
return;
}
this.expressionScope.recordAsyncArrowParametersError({
at: startLoc,
});
} else if (word === 'arguments') {
if (this.scope.inClassAndNotInNonArrowFunction) {
this.raise(Errors.ArgumentsInClass, {
at: startLoc,
});
return;
}
}
if (checkKeywords && isKeyword(word)) {
this.raise(Errors.UnexpectedKeyword, {
at: startLoc,
keyword: word,
});
return;
}
const reservedTest =
!this.state.strict ? isReservedWord
: isBinding ? isStrictBindReservedWord
: isStrictReservedWord;
if (reservedTest(word, this.inModule)) {
this.raise(Errors.UnexpectedReservedWord, {
at: startLoc,
reservedWord: word,
});
}
}
isAwaitAllowed() {
if (this.prodParam.hasAwait) return true;
if (this.options.allowAwaitOutsideFunction && !this.scope.inFunction) {
return true;
}
return false;
}
parseAwait(startPos, startLoc) {
const node = this.startNodeAt(startPos, startLoc);
this.expressionScope.recordParameterInitializerError(
Errors.AwaitExpressionFormalParameter,
{
at: node,
}
);
if (this.eat(55)) {
this.raise(Errors.ObsoleteAwaitStar, {
at: node,
});
}
if (!this.scope.inFunction && !this.options.allowAwaitOutsideFunction) {
if (this.isAmbiguousAwait()) {
this.ambiguousScriptDifferentAst = true;
} else {
this.sawUnambiguousESM = true;
}
}
if (!this.state.soloAwait) {
node.argument = this.parseMaybeUnary(null, true);
}
return this.finishNode(node, 'AwaitExpression');
}
isAmbiguousAwait() {
if (this.hasPrecedingLineBreak()) return true;
const { type } = this.state;
return (
type === 53 ||
type === 10 ||
type === 0 ||
tokenIsTemplate(type) ||
type === 133 ||
type === 56 ||
(this.hasPlugin('v8intrinsic') && type === 54)
);
}
parseYield() {
const node = this.startNode();
this.expressionScope.recordParameterInitializerError(
Errors.YieldInParameter,
{
at: node,
}
);
this.next();
let delegating = false;
let argument = null;
if (!this.hasPrecedingLineBreak()) {
delegating = this.eat(55);
switch (this.state.type) {
case 13:
case 135:
case 8:
case 11:
case 3:
case 9:
case 14:
case 12:
if (!delegating) break;
default:
argument = this.parseMaybeAssign();
}
}
node.delegate = delegating;
node.argument = argument;
return this.finishNode(node, 'YieldExpression');
}
checkPipelineAtInfixOperator(left, leftStartLoc) {
if (
this.hasPlugin([
'pipelineOperator',
{
proposal: 'smart',
},
])
) {
if (left.type === 'SequenceExpression') {
this.raise(Errors.PipelineHeadSequenceExpression, {
at: leftStartLoc,
});
}
}
}
parseSmartPipelineBodyInStyle(childExpr, startPos, startLoc) {
const bodyNode = this.startNodeAt(startPos, startLoc);
if (this.isSimpleReference(childExpr)) {
bodyNode.callee = childExpr;
return this.finishNode(bodyNode, 'PipelineBareFunction');
} else {
this.checkSmartPipeTopicBodyEarlyErrors(startLoc);
bodyNode.expression = childExpr;
return this.finishNode(bodyNode, 'PipelineTopicExpression');
}
}
isSimpleReference(expression) {
switch (expression.type) {
case 'MemberExpression':
return (
!expression.computed && this.isSimpleReference(expression.object)
);
case 'Identifier':
return true;
default:
return false;
}
}
checkSmartPipeTopicBodyEarlyErrors(startLoc) {
if (this.match(19)) {
throw this.raise(Errors.PipelineBodyNoArrow, {
at: this.state.startLoc,
});
}
if (!this.topicReferenceWasUsedInCurrentContext()) {
this.raise(Errors.PipelineTopicUnused, {
at: startLoc,
});
}
}
withTopicBindingContext(callback) {
const outerContextTopicState = this.state.topicContext;
this.state.topicContext = {
maxNumOfResolvableTopics: 1,
maxTopicIndex: null,
};
try {
return callback();
} finally {
this.state.topicContext = outerContextTopicState;
}
}
withSmartMixTopicForbiddingContext(callback) {
if (
this.hasPlugin([
'pipelineOperator',
{
proposal: 'smart',
},
])
) {
const outerContextTopicState = this.state.topicContext;
this.state.topicContext = {
maxNumOfResolvableTopics: 0,
maxTopicIndex: null,
};
try {
return callback();
} finally {
this.state.topicContext = outerContextTopicState;
}
} else {
return callback();
}
}
withSoloAwaitPermittingContext(callback) {
const outerContextSoloAwaitState = this.state.soloAwait;
this.state.soloAwait = true;
try {
return callback();
} finally {
this.state.soloAwait = outerContextSoloAwaitState;
}
}
allowInAnd(callback) {
const flags = this.prodParam.currentFlags();
const prodParamToSet = PARAM_IN & ~flags;
if (prodParamToSet) {
this.prodParam.enter(flags | PARAM_IN);
try {
return callback();
} finally {
this.prodParam.exit();
}
}
return callback();
}
disallowInAnd(callback) {
const flags = this.prodParam.currentFlags();
const prodParamToClear = PARAM_IN & flags;
if (prodParamToClear) {
this.prodParam.enter(flags & ~PARAM_IN);
try {
return callback();
} finally {
this.prodParam.exit();
}
}
return callback();
}
registerTopicReference() {
this.state.topicContext.maxTopicIndex = 0;
}
topicReferenceIsAllowedInCurrentContext() {
return this.state.topicContext.maxNumOfResolvableTopics >= 1;
}
topicReferenceWasUsedInCurrentContext() {
return (
this.state.topicContext.maxTopicIndex != null &&
this.state.topicContext.maxTopicIndex >= 0
);
}
parseFSharpPipelineBody(prec) {
const startPos = this.state.start;
const startLoc = this.state.startLoc;
this.state.potentialArrowAt = this.state.start;
const oldInFSharpPipelineDirectBody = this.state.inFSharpPipelineDirectBody;
this.state.inFSharpPipelineDirectBody = true;
const ret = this.parseExprOp(
this.parseMaybeUnaryOrPrivate(),
startPos,
startLoc,
prec
);
this.state.inFSharpPipelineDirectBody = oldInFSharpPipelineDirectBody;
return ret;
}
parseModuleExpression() {
this.expectPlugin('moduleBlocks');
const node = this.startNode();
this.next();
this.eat(5);
const revertScopes = this.initializeScopes(true);
this.enterInitialScopes();
const program = this.startNode();
try {
node.body = this.parseProgram(program, 8, 'module');
} finally {
revertScopes();
}
this.eat(8);
return this.finishNode(node, 'ModuleExpression');
}
parsePropertyNamePrefixOperator(prop) {}
}
const loopLabel = {
kind: 'loop',
},
switchLabel = {
kind: 'switch',
};
const FUNC_NO_FLAGS = 0b000,
FUNC_STATEMENT = 0b001,
FUNC_HANGING_STATEMENT = 0b010,
FUNC_NULLABLE_ID = 0b100;
const loneSurrogate = /[\uD800-\uDFFF]/u;
const keywordRelationalOperator = /in(?:stanceof)?/y;
function babel7CompatTokens(tokens, input) {
for (let i = 0; i < tokens.length; i++) {
const token = tokens[i];
const { type } = token;
if (typeof type === 'number') {
{
if (type === 134) {
const { loc, start, value, end } = token;
const hashEndPos = start + 1;
const hashEndLoc = createPositionWithColumnOffset(loc.start, 1);
tokens.splice(
i,
1,
new Token({
type: getExportedToken(27),
value: '#',
start: start,
end: hashEndPos,
startLoc: loc.start,
endLoc: hashEndLoc,
}),
new Token({
type: getExportedToken(128),
value: value,
start: hashEndPos,
end: end,
startLoc: hashEndLoc,
endLoc: loc.end,
})
);
i++;
continue;
}
if (tokenIsTemplate(type)) {
const { loc, start, value, end } = token;
const backquoteEnd = start + 1;
const backquoteEndLoc = createPositionWithColumnOffset(loc.start, 1);
let startToken;
if (input.charCodeAt(start) === 96) {
startToken = new Token({
type: getExportedToken(22),
value: '`',
start: start,
end: backquoteEnd,
startLoc: loc.start,
endLoc: backquoteEndLoc,
});
} else {
startToken = new Token({
type: getExportedToken(8),
value: '}',
start: start,
end: backquoteEnd,
startLoc: loc.start,
endLoc: backquoteEndLoc,
});
}
let templateValue,
templateElementEnd,
templateElementEndLoc,
endToken;
if (type === 24) {
templateElementEnd = end - 1;
templateElementEndLoc = createPositionWithColumnOffset(loc.end, -1);
templateValue = value === null ? null : value.slice(1, -1);
endToken = new Token({
type: getExportedToken(22),
value: '`',
start: templateElementEnd,
end: end,
startLoc: templateElementEndLoc,
endLoc: loc.end,
});
} else {
templateElementEnd = end - 2;
templateElementEndLoc = createPositionWithColumnOffset(loc.end, -2);
templateValue = value === null ? null : value.slice(1, -2);
endToken = new Token({
type: getExportedToken(23),
value: '${',
start: templateElementEnd,
end: end,
startLoc: templateElementEndLoc,
endLoc: loc.end,
});
}
tokens.splice(
i,
1,
startToken,
new Token({
type: getExportedToken(20),
value: templateValue,
start: backquoteEnd,
end: templateElementEnd,
startLoc: backquoteEndLoc,
endLoc: templateElementEndLoc,
}),
endToken
);
i += 2;
continue;
}
}
token.type = getExportedToken(type);
}
}
return tokens;
}
class StatementParser extends ExpressionParser {
parseTopLevel(file, program) {
file.program = this.parseProgram(program);
file.comments = this.state.comments;
if (this.options.tokens) {
file.tokens = babel7CompatTokens(this.tokens, this.input);
}
return this.finishNode(file, 'File');
}
parseProgram(program, end = 135, sourceType = this.options.sourceType) {
program.sourceType = sourceType;
program.interpreter = this.parseInterpreterDirective();
this.parseBlockBody(program, true, true, end);
if (
this.inModule &&
!this.options.allowUndeclaredExports &&
this.scope.undefinedExports.size > 0
) {
for (const [localName, at] of Array.from(this.scope.undefinedExports)) {
this.raise(Errors.ModuleExportUndefined, {
at,
localName,
});
}
}
return this.finishNode(program, 'Program');
}
stmtToDirective(stmt) {
const directive = stmt;
directive.type = 'Directive';
directive.value = directive.expression;
delete directive.expression;
const directiveLiteral = directive.value;
const expressionValue = directiveLiteral.value;
const raw = this.input.slice(directiveLiteral.start, directiveLiteral.end);
const val = (directiveLiteral.value = raw.slice(1, -1));
this.addExtra(directiveLiteral, 'raw', raw);
this.addExtra(directiveLiteral, 'rawValue', val);
this.addExtra(directiveLiteral, 'expressionValue', expressionValue);
directiveLiteral.type = 'DirectiveLiteral';
return directive;
}
parseInterpreterDirective() {
if (!this.match(28)) {
return null;
}
const node = this.startNode();
node.value = this.state.value;
this.next();
return this.finishNode(node, 'InterpreterDirective');
}
isLet(context) {
if (!this.isContextual(99)) {
return false;
}
return this.isLetKeyword(context);
}
isLetKeyword(context) {
const next = this.nextTokenStart();
const nextCh = this.codePointAtPos(next);
if (nextCh === 92 || nextCh === 91) {
return true;
}
if (context) return false;
if (nextCh === 123) return true;
if (isIdentifierStart(nextCh)) {
keywordRelationalOperator.lastIndex = next;
if (keywordRelationalOperator.test(this.input)) {
const endCh = this.codePointAtPos(keywordRelationalOperator.lastIndex);
if (!isIdentifierChar(endCh) && endCh !== 92) {
return false;
}
}
return true;
}
return false;
}
parseStatement(context, topLevel) {
if (this.match(26)) {
this.parseDecorators(true);
}
return this.parseStatementContent(context, topLevel);
}
parseStatementContent(context, topLevel) {
let starttype = this.state.type;
const node = this.startNode();
let kind;
if (this.isLet(context)) {
starttype = 74;
kind = 'let';
}
switch (starttype) {
case 60:
return this.parseBreakContinueStatement(node, true);
case 63:
return this.parseBreakContinueStatement(node, false);
case 64:
return this.parseDebuggerStatement(node);
case 90:
return this.parseDoStatement(node);
case 91:
return this.parseForStatement(node);
case 68:
if (this.lookaheadCharCode() === 46) break;
if (context) {
if (this.state.strict) {
this.raise(Errors.StrictFunction, {
at: this.state.startLoc,
});
} else if (context !== 'if' && context !== 'label') {
this.raise(Errors.SloppyFunction, {
at: this.state.startLoc,
});
}
}
return this.parseFunctionStatement(node, false, !context);
case 80:
if (context) this.unexpected();
return this.parseClass(node, true);
case 69:
return this.parseIfStatement(node);
case 70:
return this.parseReturnStatement(node);
case 71:
return this.parseSwitchStatement(node);
case 72:
return this.parseThrowStatement(node);
case 73:
return this.parseTryStatement(node);
case 75:
case 74:
kind = kind || this.state.value;
if (context && kind !== 'var') {
this.raise(Errors.UnexpectedLexicalDeclaration, {
at: this.state.startLoc,
});
}
return this.parseVarStatement(node, kind);
case 92:
return this.parseWhileStatement(node);
case 76:
return this.parseWithStatement(node);
case 5:
return this.parseBlock();
case 13:
return this.parseEmptyStatement(node);
case 83: {
const nextTokenCharCode = this.lookaheadCharCode();
if (nextTokenCharCode === 40 || nextTokenCharCode === 46) {
break;
}
}
case 82: {
if (!this.options.allowImportExportEverywhere && !topLevel) {
this.raise(Errors.UnexpectedImportExport, {
at: this.state.startLoc,
});
}
this.next();
let result;
if (starttype === 83) {
result = this.parseImport(node);
if (
result.type === 'ImportDeclaration' &&
(!result.importKind || result.importKind === 'value')
) {
this.sawUnambiguousESM = true;
}
} else {
result = this.parseExport(node);
if (
(result.type === 'ExportNamedDeclaration' &&
(!result.exportKind || result.exportKind === 'value')) ||
(result.type === 'ExportAllDeclaration' &&
(!result.exportKind || result.exportKind === 'value')) ||
result.type === 'ExportDefaultDeclaration'
) {
this.sawUnambiguousESM = true;
}
}
this.assertModuleNodeAllowed(node);
return result;
}
default: {
if (this.isAsyncFunction()) {
if (context) {
this.raise(Errors.AsyncFunctionInSingleStatementContext, {
at: this.state.startLoc,
});
}
this.next();
return this.parseFunctionStatement(node, true, !context);
}
}
}
const maybeName = this.state.value;
const expr = this.parseExpression();
if (
tokenIsIdentifier(starttype) &&
expr.type === 'Identifier' &&
this.eat(14)
) {
return this.parseLabeledStatement(node, maybeName, expr, context);
} else {
return this.parseExpressionStatement(node, expr);
}
}
assertModuleNodeAllowed(node) {
if (!this.options.allowImportExportEverywhere && !this.inModule) {
this.raise(Errors.ImportOutsideModule, {
at: node,
});
}
}
takeDecorators(node) {
const decorators =
this.state.decoratorStack[this.state.decoratorStack.length - 1];
if (decorators.length) {
node.decorators = decorators;
this.resetStartLocationFromNode(node, decorators[0]);
this.state.decoratorStack[this.state.decoratorStack.length - 1] = [];
}
}
canHaveLeadingDecorator() {
return this.match(80);
}
parseDecorators(allowExport) {
const currentContextDecorators =
this.state.decoratorStack[this.state.decoratorStack.length - 1];
while (this.match(26)) {
const decorator = this.parseDecorator();
currentContextDecorators.push(decorator);
}
if (this.match(82)) {
if (!allowExport) {
this.unexpected();
}
if (
this.hasPlugin('decorators') &&
!this.getPluginOption('decorators', 'decoratorsBeforeExport')
) {
this.raise(Errors.DecoratorExportClass, {
at: this.state.startLoc,
});
}
} else if (!this.canHaveLeadingDecorator()) {
throw this.raise(Errors.UnexpectedLeadingDecorator, {
at: this.state.startLoc,
});
}
}
parseDecorator() {
this.expectOnePlugin(['decorators-legacy', 'decorators']);
const node = this.startNode();
this.next();
if (this.hasPlugin('decorators')) {
this.state.decoratorStack.push([]);
const startPos = this.state.start;
const startLoc = this.state.startLoc;
let expr;
if (this.match(10)) {
const startPos = this.state.start;
const startLoc = this.state.startLoc;
this.next();
expr = this.parseExpression();
this.expect(11);
expr = this.wrapParenthesis(startPos, startLoc, expr);
} else {
expr = this.parseIdentifier(false);
while (this.eat(16)) {
const node = this.startNodeAt(startPos, startLoc);
node.object = expr;
node.property = this.parseIdentifier(true);
node.computed = false;
expr = this.finishNode(node, 'MemberExpression');
}
}
node.expression = this.parseMaybeDecoratorArguments(expr);
this.state.decoratorStack.pop();
} else {
node.expression = this.parseExprSubscripts();
}
return this.finishNode(node, 'Decorator');
}
parseMaybeDecoratorArguments(expr) {
if (this.eat(10)) {
const node = this.startNodeAtNode(expr);
node.callee = expr;
node.arguments = this.parseCallExpressionArguments(11, false);
this.toReferencedList(node.arguments);
return this.finishNode(node, 'CallExpression');
}
return expr;
}
parseBreakContinueStatement(node, isBreak) {
this.next();
if (this.isLineTerminator()) {
node.label = null;
} else {
node.label = this.parseIdentifier();
this.semicolon();
}
this.verifyBreakContinue(node, isBreak);
return this.finishNode(
node,
isBreak ? 'BreakStatement' : 'ContinueStatement'
);
}
verifyBreakContinue(node, isBreak) {
let i;
for (i = 0; i < this.state.labels.length; ++i) {
const lab = this.state.labels[i];
if (node.label == null || lab.name === node.label.name) {
if (lab.kind != null && (isBreak || lab.kind === 'loop')) break;
if (node.label && isBreak) break;
}
}
if (i === this.state.labels.length) {
const type = isBreak ? 'BreakStatement' : 'ContinueStatement';
this.raise(Errors.IllegalBreakContinue, {
at: node,
type,
});
}
}
parseDebuggerStatement(node) {
this.next();
this.semicolon();
return this.finishNode(node, 'DebuggerStatement');
}
parseHeaderExpression() {
this.expect(10);
const val = this.parseExpression();
this.expect(11);
return val;
}
parseDoStatement(node) {
this.next();
this.state.labels.push(loopLabel);
node.body = this.withSmartMixTopicForbiddingContext(() =>
this.parseStatement('do')
);
this.state.labels.pop();
this.expect(92);
node.test = this.parseHeaderExpression();
this.eat(13);
return this.finishNode(node, 'DoWhileStatement');
}
parseForStatement(node) {
this.next();
this.state.labels.push(loopLabel);
let awaitAt = null;
if (this.isAwaitAllowed() && this.eatContextual(96)) {
awaitAt = this.state.lastTokStartLoc;
}
this.scope.enter(SCOPE_OTHER);
this.expect(10);
if (this.match(13)) {
if (awaitAt !== null) {
this.unexpected(awaitAt);
}
return this.parseFor(node, null);
}
const startsWithLet = this.isContextual(99);
const isLet = startsWithLet && this.isLetKeyword();
if (this.match(74) || this.match(75) || isLet) {
const init = this.startNode();
const kind = isLet ? 'let' : this.state.value;
this.next();
this.parseVar(init, true, kind);
this.finishNode(init, 'VariableDeclaration');
if (
(this.match(58) || this.isContextual(101)) &&
init.declarations.length === 1
) {
return this.parseForIn(node, init, awaitAt);
}
if (awaitAt !== null) {
this.unexpected(awaitAt);
}
return this.parseFor(node, init);
}
const startsWithAsync = this.isContextual(95);
const refExpressionErrors = new ExpressionErrors();
const init = this.parseExpression(true, refExpressionErrors);
const isForOf = this.isContextual(101);
if (isForOf) {
if (startsWithLet) {
this.raise(Errors.ForOfLet, {
at: init,
});
}
if (awaitAt === null && startsWithAsync && init.type === 'Identifier') {
this.raise(Errors.ForOfAsync, {
at: init,
});
}
}
if (isForOf || this.match(58)) {
this.checkDestructuringPrivate(refExpressionErrors);
this.toAssignable(init, true);
const type = isForOf ? 'ForOfStatement' : 'ForInStatement';
this.checkLVal(init, {
in: {
type,
},
});
return this.parseForIn(node, init, awaitAt);
} else {
this.checkExpressionErrors(refExpressionErrors, true);
}
if (awaitAt !== null) {
this.unexpected(awaitAt);
}
return this.parseFor(node, init);
}
parseFunctionStatement(node, isAsync, declarationPosition) {
this.next();
return this.parseFunction(
node,
FUNC_STATEMENT | (declarationPosition ? 0 : FUNC_HANGING_STATEMENT),
isAsync
);
}
parseIfStatement(node) {
this.next();
node.test = this.parseHeaderExpression();
node.consequent = this.parseStatement('if');
node.alternate = this.eat(66) ? this.parseStatement('if') : null;
return this.finishNode(node, 'IfStatement');
}
parseReturnStatement(node) {
if (!this.prodParam.hasReturn && !this.options.allowReturnOutsideFunction) {
this.raise(Errors.IllegalReturn, {
at: this.state.startLoc,
});
}
this.next();
if (this.isLineTerminator()) {
node.argument = null;
} else {
node.argument = this.parseExpression();
this.semicolon();
}
return this.finishNode(node, 'ReturnStatement');
}
parseSwitchStatement(node) {
this.next();
node.discriminant = this.parseHeaderExpression();
const cases = (node.cases = []);
this.expect(5);
this.state.labels.push(switchLabel);
this.scope.enter(SCOPE_OTHER);
let cur;
for (let sawDefault; !this.match(8); ) {
if (this.match(61) || this.match(65)) {
const isCase = this.match(61);
if (cur) this.finishNode(cur, 'SwitchCase');
cases.push((cur = this.startNode()));
cur.consequent = [];
this.next();
if (isCase) {
cur.test = this.parseExpression();
} else {
if (sawDefault) {
this.raise(Errors.MultipleDefaultsInSwitch, {
at: this.state.lastTokStartLoc,
});
}
sawDefault = true;
cur.test = null;
}
this.expect(14);
} else {
if (cur) {
cur.consequent.push(this.parseStatement(null));
} else {
this.unexpected();
}
}
}
this.scope.exit();
if (cur) this.finishNode(cur, 'SwitchCase');
this.next();
this.state.labels.pop();
return this.finishNode(node, 'SwitchStatement');
}
parseThrowStatement(node) {
this.next();
if (this.hasPrecedingLineBreak()) {
this.raise(Errors.NewlineAfterThrow, {
at: this.state.lastTokEndLoc,
});
}
node.argument = this.parseExpression();
this.semicolon();
return this.finishNode(node, 'ThrowStatement');
}
parseCatchClauseParam() {
const param = this.parseBindingAtom();
const simple = param.type === 'Identifier';
this.scope.enter(simple ? SCOPE_SIMPLE_CATCH : 0);
this.checkLVal(param, {
in: {
type: 'CatchClause',
},
binding: BIND_LEXICAL,
allowingSloppyLetBinding: true,
});
return param;
}
parseTryStatement(node) {
this.next();
node.block = this.parseBlock();
node.handler = null;
if (this.match(62)) {
const clause = this.startNode();
this.next();
if (this.match(10)) {
this.expect(10);
clause.param = this.parseCatchClauseParam();
this.expect(11);
} else {
clause.param = null;
this.scope.enter(SCOPE_OTHER);
}
clause.body = this.withSmartMixTopicForbiddingContext(() =>
this.parseBlock(false, false)
);
this.scope.exit();
node.handler = this.finishNode(clause, 'CatchClause');
}
node.finalizer = this.eat(67) ? this.parseBlock() : null;
if (!node.handler && !node.finalizer) {
this.raise(Errors.NoCatchOrFinally, {
at: node,
});
}
return this.finishNode(node, 'TryStatement');
}
parseVarStatement(node, kind, allowMissingInitializer = false) {
this.next();
this.parseVar(node, false, kind, allowMissingInitializer);
this.semicolon();
return this.finishNode(node, 'VariableDeclaration');
}
parseWhileStatement(node) {
this.next();
node.test = this.parseHeaderExpression();
this.state.labels.push(loopLabel);
node.body = this.withSmartMixTopicForbiddingContext(() =>
this.parseStatement('while')
);
this.state.labels.pop();
return this.finishNode(node, 'WhileStatement');
}
parseWithStatement(node) {
if (this.state.strict) {
this.raise(Errors.StrictWith, {
at: this.state.startLoc,
});
}
this.next();
node.object = this.parseHeaderExpression();
node.body = this.withSmartMixTopicForbiddingContext(() =>
this.parseStatement('with')
);
return this.finishNode(node, 'WithStatement');
}
parseEmptyStatement(node) {
this.next();
return this.finishNode(node, 'EmptyStatement');
}
parseLabeledStatement(node, maybeName, expr, context) {
for (const label of this.state.labels) {
if (label.name === maybeName) {
this.raise(Errors.LabelRedeclaration, {
at: expr,
labelName: maybeName,
});
}
}
const kind =
tokenIsLoop(this.state.type) ? 'loop'
: this.match(71) ? 'switch'
: null;
for (let i = this.state.labels.length - 1; i >= 0; i--) {
const label = this.state.labels[i];
if (label.statementStart === node.start) {
label.statementStart = this.state.start;
label.kind = kind;
} else {
break;
}
}
this.state.labels.push({
name: maybeName,
kind: kind,
statementStart: this.state.start,
});
node.body = this.parseStatement(
context ?
context.indexOf('label') === -1 ?
context + 'label'
: context
: 'label'
);
this.state.labels.pop();
node.label = expr;
return this.finishNode(node, 'LabeledStatement');
}
parseExpressionStatement(node, expr) {
node.expression = expr;
this.semicolon();
return this.finishNode(node, 'ExpressionStatement');
}
parseBlock(
allowDirectives = false,
createNewLexicalScope = true,
afterBlockParse
) {
const node = this.startNode();
if (allowDirectives) {
this.state.strictErrors.clear();
}
this.expect(5);
if (createNewLexicalScope) {
this.scope.enter(SCOPE_OTHER);
}
this.parseBlockBody(node, allowDirectives, false, 8, afterBlockParse);
if (createNewLexicalScope) {
this.scope.exit();
}
return this.finishNode(node, 'BlockStatement');
}
isValidDirective(stmt) {
return (
stmt.type === 'ExpressionStatement' &&
stmt.expression.type === 'StringLiteral' &&
!stmt.expression.extra.parenthesized
);
}
parseBlockBody(node, allowDirectives, topLevel, end, afterBlockParse) {
const body = (node.body = []);
const directives = (node.directives = []);
this.parseBlockOrModuleBlockBody(
body,
allowDirectives ? directives : undefined,
topLevel,
end,
afterBlockParse
);
}
parseBlockOrModuleBlockBody(
body,
directives,
topLevel,
end,
afterBlockParse
) {
const oldStrict = this.state.strict;
let hasStrictModeDirective = false;
let parsedNonDirective = false;
while (!this.match(end)) {
const stmt = this.parseStatement(null, topLevel);
if (directives && !parsedNonDirective) {
if (this.isValidDirective(stmt)) {
const directive = this.stmtToDirective(stmt);
directives.push(directive);
if (
!hasStrictModeDirective &&
directive.value.value === 'use strict'
) {
hasStrictModeDirective = true;
this.setStrict(true);
}
continue;
}
parsedNonDirective = true;
this.state.strictErrors.clear();
}
body.push(stmt);
}
if (afterBlockParse) {
afterBlockParse.call(this, hasStrictModeDirective);
}
if (!oldStrict) {
this.setStrict(false);
}
this.next();
}
parseFor(node, init) {
node.init = init;
this.semicolon(false);
node.test = this.match(13) ? null : this.parseExpression();
this.semicolon(false);
node.update = this.match(11) ? null : this.parseExpression();
this.expect(11);
node.body = this.withSmartMixTopicForbiddingContext(() =>
this.parseStatement('for')
);
this.scope.exit();
this.state.labels.pop();
return this.finishNode(node, 'ForStatement');
}
parseForIn(node, init, awaitAt) {
const isForIn = this.match(58);
this.next();
if (isForIn) {
if (awaitAt !== null) this.unexpected(awaitAt);
} else {
node.await = awaitAt !== null;
}
if (
init.type === 'VariableDeclaration' &&
init.declarations[0].init != null &&
(!isForIn ||
this.state.strict ||
init.kind !== 'var' ||
init.declarations[0].id.type !== 'Identifier')
) {
this.raise(Errors.ForInOfLoopInitializer, {
at: init,
type: isForIn ? 'ForInStatement' : 'ForOfStatement',
});
}
if (init.type === 'AssignmentPattern') {
this.raise(Errors.InvalidLhs, {
at: init,
ancestor: {
type: 'ForStatement',
},
});
}
node.left = init;
node.right =
isForIn ? this.parseExpression() : this.parseMaybeAssignAllowIn();
this.expect(11);
node.body = this.withSmartMixTopicForbiddingContext(() =>
this.parseStatement('for')
);
this.scope.exit();
this.state.labels.pop();
return this.finishNode(node, isForIn ? 'ForInStatement' : 'ForOfStatement');
}
parseVar(node, isFor, kind, allowMissingInitializer = false) {
const declarations = (node.declarations = []);
node.kind = kind;
for (;;) {
const decl = this.startNode();
this.parseVarId(decl, kind);
decl.init =
!this.eat(29) ? null
: isFor ? this.parseMaybeAssignDisallowIn()
: this.parseMaybeAssignAllowIn();
if (decl.init === null && !allowMissingInitializer) {
if (
decl.id.type !== 'Identifier' &&
!(isFor && (this.match(58) || this.isContextual(101)))
) {
this.raise(Errors.DeclarationMissingInitializer, {
at: this.state.lastTokEndLoc,
kind: 'destructuring',
});
} else if (
kind === 'const' &&
!(this.match(58) || this.isContextual(101))
) {
this.raise(Errors.DeclarationMissingInitializer, {
at: this.state.lastTokEndLoc,
kind: 'const',
});
}
}
declarations.push(this.finishNode(decl, 'VariableDeclarator'));
if (!this.eat(12)) break;
}
return node;
}
parseVarId(decl, kind) {
decl.id = this.parseBindingAtom();
this.checkLVal(decl.id, {
in: {
type: 'VariableDeclarator',
},
binding: kind === 'var' ? BIND_VAR : BIND_LEXICAL,
});
}
parseFunction(node, statement = FUNC_NO_FLAGS, isAsync = false) {
const isStatement = statement & FUNC_STATEMENT;
const isHangingStatement = statement & FUNC_HANGING_STATEMENT;
const requireId = !!isStatement && !(statement & FUNC_NULLABLE_ID);
this.initFunction(node, isAsync);
if (this.match(55) && isHangingStatement) {
this.raise(Errors.GeneratorInSingleStatementContext, {
at: this.state.startLoc,
});
}
node.generator = this.eat(55);
if (isStatement) {
node.id = this.parseFunctionId(requireId);
}
const oldMaybeInArrowParameters = this.state.maybeInArrowParameters;
this.state.maybeInArrowParameters = false;
this.scope.enter(SCOPE_FUNCTION);
this.prodParam.enter(functionFlags(isAsync, node.generator));
if (!isStatement) {
node.id = this.parseFunctionId();
}
this.parseFunctionParams(node, false);
this.withSmartMixTopicForbiddingContext(() => {
this.parseFunctionBodyAndFinish(
node,
isStatement ? 'FunctionDeclaration' : 'FunctionExpression'
);
});
this.prodParam.exit();
this.scope.exit();
if (isStatement && !isHangingStatement) {
this.registerFunctionStatementId(node);
}
this.state.maybeInArrowParameters = oldMaybeInArrowParameters;
return node;
}
parseFunctionId(requireId) {
return requireId || tokenIsIdentifier(this.state.type) ?
this.parseIdentifier()
: null;
}
parseFunctionParams(node, allowModifiers) {
this.expect(10);
this.expressionScope.enter(newParameterDeclarationScope());
node.params = this.parseBindingList(11, 41, false, allowModifiers);
this.expressionScope.exit();
}
registerFunctionStatementId(node) {
if (!node.id) return;
this.scope.declareName(
node.id.name,
this.state.strict || node.generator || node.async ?
this.scope.treatFunctionsAsVar ?
BIND_VAR
: BIND_LEXICAL
: BIND_FUNCTION,
node.id.loc.start
);
}
parseClass(node, isStatement, optionalId) {
this.next();
this.takeDecorators(node);
const oldStrict = this.state.strict;
this.state.strict = true;
this.parseClassId(node, isStatement, optionalId);
this.parseClassSuper(node);
node.body = this.parseClassBody(!!node.superClass, oldStrict);
return this.finishNode(
node,
isStatement ? 'ClassDeclaration' : 'ClassExpression'
);
}
isClassProperty() {
return this.match(29) || this.match(13) || this.match(8);
}
isClassMethod() {
return this.match(10);
}
isNonstaticConstructor(method) {
return (
!method.computed &&
!method.static &&
(method.key.name === 'constructor' || method.key.value === 'constructor')
);
}
parseClassBody(hadSuperClass, oldStrict) {
this.classScope.enter();
const state = {
hadConstructor: false,
hadSuperClass,
};
let decorators = [];
const classBody = this.startNode();
classBody.body = [];
this.expect(5);
this.withSmartMixTopicForbiddingContext(() => {
while (!this.match(8)) {
if (this.eat(13)) {
if (decorators.length > 0) {
throw this.raise(Errors.DecoratorSemicolon, {
at: this.state.lastTokEndLoc,
});
}
continue;
}
if (this.match(26)) {
decorators.push(this.parseDecorator());
continue;
}
const member = this.startNode();
if (decorators.length) {
member.decorators = decorators;
this.resetStartLocationFromNode(member, decorators[0]);
decorators = [];
}
this.parseClassMember(classBody, member, state);
if (
member.kind === 'constructor' &&
member.decorators &&
member.decorators.length > 0
) {
this.raise(Errors.DecoratorConstructor, {
at: member,
});
}
}
});
this.state.strict = oldStrict;
this.next();
if (decorators.length) {
throw this.raise(Errors.TrailingDecorator, {
at: this.state.startLoc,
});
}
this.classScope.exit();
return this.finishNode(classBody, 'ClassBody');
}
parseClassMemberFromModifier(classBody, member) {
const key = this.parseIdentifier(true);
if (this.isClassMethod()) {
const method = member;
method.kind = 'method';
method.computed = false;
method.key = key;
method.static = false;
this.pushClassMethod(classBody, method, false, false, false, false);
return true;
} else if (this.isClassProperty()) {
const prop = member;
prop.computed = false;
prop.key = key;
prop.static = false;
classBody.body.push(this.parseClassProperty(prop));
return true;
}
this.resetPreviousNodeTrailingComments(key);
return false;
}
parseClassMember(classBody, member, state) {
const isStatic = this.isContextual(104);
if (isStatic) {
if (this.parseClassMemberFromModifier(classBody, member)) {
return;
}
if (this.eat(5)) {
this.parseClassStaticBlock(classBody, member);
return;
}
}
this.parseClassMemberWithIsStatic(classBody, member, state, isStatic);
}
parseClassMemberWithIsStatic(classBody, member, state, isStatic) {
const publicMethod = member;
const privateMethod = member;
const publicProp = member;
const privateProp = member;
const accessorProp = member;
const method = publicMethod;
const publicMember = publicMethod;
member.static = isStatic;
this.parsePropertyNamePrefixOperator(member);
if (this.eat(55)) {
method.kind = 'method';
const isPrivateName = this.match(134);
this.parseClassElementName(method);
if (isPrivateName) {
this.pushClassPrivateMethod(classBody, privateMethod, true, false);
return;
}
if (this.isNonstaticConstructor(publicMethod)) {
this.raise(Errors.ConstructorIsGenerator, {
at: publicMethod.key,
});
}
this.pushClassMethod(classBody, publicMethod, true, false, false, false);
return;
}
const isContextual =
tokenIsIdentifier(this.state.type) && !this.state.containsEsc;
const isPrivate = this.match(134);
const key = this.parseClassElementName(member);
const maybeQuestionTokenStartLoc = this.state.startLoc;
this.parsePostMemberNameModifiers(publicMember);
if (this.isClassMethod()) {
method.kind = 'method';
if (isPrivate) {
this.pushClassPrivateMethod(classBody, privateMethod, false, false);
return;
}
const isConstructor = this.isNonstaticConstructor(publicMethod);
let allowsDirectSuper = false;
if (isConstructor) {
publicMethod.kind = 'constructor';
if (state.hadConstructor && !this.hasPlugin('typescript')) {
this.raise(Errors.DuplicateConstructor, {
at: key,
});
}
if (isConstructor && this.hasPlugin('typescript') && member.override) {
this.raise(Errors.OverrideOnConstructor, {
at: key,
});
}
state.hadConstructor = true;
allowsDirectSuper = state.hadSuperClass;
}
this.pushClassMethod(
classBody,
publicMethod,
false,
false,
isConstructor,
allowsDirectSuper
);
} else if (this.isClassProperty()) {
if (isPrivate) {
this.pushClassPrivateProperty(classBody, privateProp);
} else {
this.pushClassProperty(classBody, publicProp);
}
} else if (
isContextual &&
key.name === 'async' &&
!this.isLineTerminator()
) {
this.resetPreviousNodeTrailingComments(key);
const isGenerator = this.eat(55);
if (publicMember.optional) {
this.unexpected(maybeQuestionTokenStartLoc);
}
method.kind = 'method';
const isPrivate = this.match(134);
this.parseClassElementName(method);
this.parsePostMemberNameModifiers(publicMember);
if (isPrivate) {
this.pushClassPrivateMethod(
classBody,
privateMethod,
isGenerator,
true
);
} else {
if (this.isNonstaticConstructor(publicMethod)) {
this.raise(Errors.ConstructorIsAsync, {
at: publicMethod.key,
});
}
this.pushClassMethod(
classBody,
publicMethod,
isGenerator,
true,
false,
false
);
}
} else if (
isContextual &&
(key.name === 'get' || key.name === 'set') &&
!(this.match(55) && this.isLineTerminator())
) {
this.resetPreviousNodeTrailingComments(key);
method.kind = key.name;
const isPrivate = this.match(134);
this.parseClassElementName(publicMethod);
if (isPrivate) {
this.pushClassPrivateMethod(classBody, privateMethod, false, false);
} else {
if (this.isNonstaticConstructor(publicMethod)) {
this.raise(Errors.ConstructorIsAccessor, {
at: publicMethod.key,
});
}
this.pushClassMethod(
classBody,
publicMethod,
false,
false,
false,
false
);
}
this.checkGetterSetterParams(publicMethod);
} else if (
isContextual &&
key.name === 'accessor' &&
!this.isLineTerminator()
) {
this.expectPlugin('decoratorAutoAccessors');
this.resetPreviousNodeTrailingComments(key);
const isPrivate = this.match(134);
this.parseClassElementName(publicProp);
this.pushClassAccessorProperty(classBody, accessorProp, isPrivate);
} else if (this.isLineTerminator()) {
if (isPrivate) {
this.pushClassPrivateProperty(classBody, privateProp);
} else {
this.pushClassProperty(classBody, publicProp);
}
} else {
this.unexpected();
}
}
parseClassElementName(member) {
const { type, value } = this.state;
if (
(type === 128 || type === 129) &&
member.static &&
value === 'prototype'
) {
this.raise(Errors.StaticPrototype, {
at: this.state.startLoc,
});
}
if (type === 134) {
if (value === 'constructor') {
this.raise(Errors.ConstructorClassPrivateField, {
at: this.state.startLoc,
});
}
const key = this.parsePrivateName();
member.key = key;
return key;
}
return this.parsePropertyName(member);
}
parseClassStaticBlock(classBody, member) {
var _member$decorators;
this.scope.enter(SCOPE_CLASS | SCOPE_STATIC_BLOCK | SCOPE_SUPER);
const oldLabels = this.state.labels;
this.state.labels = [];
this.prodParam.enter(PARAM);
const body = (member.body = []);
this.parseBlockOrModuleBlockBody(body, undefined, false, 8);
this.prodParam.exit();
this.scope.exit();
this.state.labels = oldLabels;
classBody.body.push(this.finishNode(member, 'StaticBlock'));
if (
(_member$decorators = member.decorators) != null &&
_member$decorators.length
) {
this.raise(Errors.DecoratorStaticBlock, {
at: member,
});
}
}
pushClassProperty(classBody, prop) {
if (
!prop.computed &&
(prop.key.name === 'constructor' || prop.key.value === 'constructor')
) {
this.raise(Errors.ConstructorClassField, {
at: prop.key,
});
}
classBody.body.push(this.parseClassProperty(prop));
}
pushClassPrivateProperty(classBody, prop) {
const node = this.parseClassPrivateProperty(prop);
classBody.body.push(node);
this.classScope.declarePrivateName(
this.getPrivateNameSV(node.key),
CLASS_ELEMENT_OTHER,
node.key.loc.start
);
}
pushClassAccessorProperty(classBody, prop, isPrivate) {
if (!isPrivate && !prop.computed) {
const key = prop.key;
if (key.name === 'constructor' || key.value === 'constructor') {
this.raise(Errors.ConstructorClassField, {
at: key,
});
}
}
const node = this.parseClassAccessorProperty(prop);
classBody.body.push(node);
if (isPrivate) {
this.classScope.declarePrivateName(
this.getPrivateNameSV(node.key),
CLASS_ELEMENT_OTHER,
node.key.loc.start
);
}
}
pushClassMethod(
classBody,
method,
isGenerator,
isAsync,
isConstructor,
allowsDirectSuper
) {
classBody.body.push(
this.parseMethod(
method,
isGenerator,
isAsync,
isConstructor,
allowsDirectSuper,
'ClassMethod',
true
)
);
}
pushClassPrivateMethod(classBody, method, isGenerator, isAsync) {
const node = this.parseMethod(
method,
isGenerator,
isAsync,
false,
false,
'ClassPrivateMethod',
true
);
classBody.body.push(node);
const kind =
node.kind === 'get' ?
node.static ?
CLASS_ELEMENT_STATIC_GETTER
: CLASS_ELEMENT_INSTANCE_GETTER
: node.kind === 'set' ?
node.static ?
CLASS_ELEMENT_STATIC_SETTER
: CLASS_ELEMENT_INSTANCE_SETTER
: CLASS_ELEMENT_OTHER;
this.declareClassPrivateMethodInScope(node, kind);
}
declareClassPrivateMethodInScope(node, kind) {
this.classScope.declarePrivateName(
this.getPrivateNameSV(node.key),
kind,
node.key.loc.start
);
}
parsePostMemberNameModifiers(methodOrProp) {}
parseClassPrivateProperty(node) {
this.parseInitializer(node);
this.semicolon();
return this.finishNode(node, 'ClassPrivateProperty');
}
parseClassProperty(node) {
this.parseInitializer(node);
this.semicolon();
return this.finishNode(node, 'ClassProperty');
}
parseClassAccessorProperty(node) {
this.parseInitializer(node);
this.semicolon();
return this.finishNode(node, 'ClassAccessorProperty');
}
parseInitializer(node) {
this.scope.enter(SCOPE_CLASS | SCOPE_SUPER);
this.expressionScope.enter(newExpressionScope());
this.prodParam.enter(PARAM);
node.value = this.eat(29) ? this.parseMaybeAssignAllowIn() : null;
this.expressionScope.exit();
this.prodParam.exit();
this.scope.exit();
}
parseClassId(node, isStatement, optionalId, bindingType = BIND_CLASS) {
if (tokenIsIdentifier(this.state.type)) {
node.id = this.parseIdentifier();
if (isStatement) {
this.declareNameFromIdentifier(node.id, bindingType);
}
} else {
if (optionalId || !isStatement) {
node.id = null;
} else {
throw this.raise(Errors.MissingClassName, {
at: this.state.startLoc,
});
}
}
}
parseClassSuper(node) {
node.superClass = this.eat(81) ? this.parseExprSubscripts() : null;
}
parseExport(node) {
const hasDefault = this.maybeParseExportDefaultSpecifier(node);
const parseAfterDefault = !hasDefault || this.eat(12);
const hasStar = parseAfterDefault && this.eatExportStar(node);
const hasNamespace =
hasStar && this.maybeParseExportNamespaceSpecifier(node);
const parseAfterNamespace =
parseAfterDefault && (!hasNamespace || this.eat(12));
const isFromRequired = hasDefault || hasStar;
if (hasStar && !hasNamespace) {
if (hasDefault) this.unexpected();
this.parseExportFrom(node, true);
return this.finishNode(node, 'ExportAllDeclaration');
}
const hasSpecifiers = this.maybeParseExportNamedSpecifiers(node);
if (
(hasDefault && parseAfterDefault && !hasStar && !hasSpecifiers) ||
(hasNamespace && parseAfterNamespace && !hasSpecifiers)
) {
throw this.unexpected(null, 5);
}
let hasDeclaration;
if (isFromRequired || hasSpecifiers) {
hasDeclaration = false;
this.parseExportFrom(node, isFromRequired);
} else {
hasDeclaration = this.maybeParseExportDeclaration(node);
}
if (isFromRequired || hasSpecifiers || hasDeclaration) {
this.checkExport(node, true, false, !!node.source);
return this.finishNode(node, 'ExportNamedDeclaration');
}
if (this.eat(65)) {
node.declaration = this.parseExportDefaultExpression();
this.checkExport(node, true, true);
return this.finishNode(node, 'ExportDefaultDeclaration');
}
throw this.unexpected(null, 5);
}
eatExportStar(node) {
return this.eat(55);
}
maybeParseExportDefaultSpecifier(node) {
if (this.isExportDefaultSpecifier()) {
this.expectPlugin('exportDefaultFrom');
const specifier = this.startNode();
specifier.exported = this.parseIdentifier(true);
node.specifiers = [this.finishNode(specifier, 'ExportDefaultSpecifier')];
return true;
}
return false;
}
maybeParseExportNamespaceSpecifier(node) {
if (this.isContextual(93)) {
if (!node.specifiers) node.specifiers = [];
const specifier = this.startNodeAt(
this.state.lastTokStart,
this.state.lastTokStartLoc
);
this.next();
specifier.exported = this.parseModuleExportName();
node.specifiers.push(
this.finishNode(specifier, 'ExportNamespaceSpecifier')
);
return true;
}
return false;
}
maybeParseExportNamedSpecifiers(node) {
if (this.match(5)) {
if (!node.specifiers) node.specifiers = [];
const isTypeExport = node.exportKind === 'type';
node.specifiers.push(...this.parseExportSpecifiers(isTypeExport));
node.source = null;
node.declaration = null;
if (this.hasPlugin('importAssertions')) {
node.assertions = [];
}
return true;
}
return false;
}
maybeParseExportDeclaration(node) {
if (this.shouldParseExportDeclaration()) {
node.specifiers = [];
node.source = null;
if (this.hasPlugin('importAssertions')) {
node.assertions = [];
}
node.declaration = this.parseExportDeclaration(node);
return true;
}
return false;
}
isAsyncFunction() {
if (!this.isContextual(95)) return false;
const next = this.nextTokenStart();
return (
!lineBreak.test(this.input.slice(this.state.pos, next)) &&
this.isUnparsedContextual(next, 'function')
);
}
parseExportDefaultExpression() {
const expr = this.startNode();
const isAsync = this.isAsyncFunction();
if (this.match(68) || isAsync) {
this.next();
if (isAsync) {
this.next();
}
return this.parseFunction(
expr,
FUNC_STATEMENT | FUNC_NULLABLE_ID,
isAsync
);
}
if (this.match(80)) {
return this.parseClass(expr, true, true);
}
if (this.match(26)) {
if (
this.hasPlugin('decorators') &&
this.getPluginOption('decorators', 'decoratorsBeforeExport')
) {
this.raise(Errors.DecoratorBeforeExport, {
at: this.state.startLoc,
});
}
this.parseDecorators(false);
return this.parseClass(expr, true, true);
}
if (this.match(75) || this.match(74) || this.isLet()) {
throw this.raise(Errors.UnsupportedDefaultExport, {
at: this.state.startLoc,
});
}
const res = this.parseMaybeAssignAllowIn();
this.semicolon();
return res;
}
parseExportDeclaration(node) {
return this.parseStatement(null);
}
isExportDefaultSpecifier() {
const { type } = this.state;
if (tokenIsIdentifier(type)) {
if ((type === 95 && !this.state.containsEsc) || type === 99) {
return false;
}
if ((type === 126 || type === 125) && !this.state.containsEsc) {
const { type: nextType } = this.lookahead();
if (
(tokenIsIdentifier(nextType) && nextType !== 97) ||
nextType === 5
) {
this.expectOnePlugin(['flow', 'typescript']);
return false;
}
}
} else if (!this.match(65)) {
return false;
}
const next = this.nextTokenStart();
const hasFrom = this.isUnparsedContextual(next, 'from');
if (
this.input.charCodeAt(next) === 44 ||
(tokenIsIdentifier(this.state.type) && hasFrom)
) {
return true;
}
if (this.match(65) && hasFrom) {
const nextAfterFrom = this.input.charCodeAt(
this.nextTokenStartSince(next + 4)
);
return nextAfterFrom === 34 || nextAfterFrom === 39;
}
return false;
}
parseExportFrom(node, expect) {
if (this.eatContextual(97)) {
node.source = this.parseImportSource();
this.checkExport(node);
const assertions = this.maybeParseImportAssertions();
if (assertions) {
node.assertions = assertions;
}
} else if (expect) {
this.unexpected();
}
this.semicolon();
}
shouldParseExportDeclaration() {
const { type } = this.state;
if (type === 26) {
this.expectOnePlugin(['decorators', 'decorators-legacy']);
if (this.hasPlugin('decorators')) {
if (this.getPluginOption('decorators', 'decoratorsBeforeExport')) {
throw this.raise(Errors.DecoratorBeforeExport, {
at: this.state.startLoc,
});
}
return true;
}
}
return (
type === 74 ||
type === 75 ||
type === 68 ||
type === 80 ||
this.isLet() ||
this.isAsyncFunction()
);
}
checkExport(node, checkNames, isDefault, isFrom) {
if (checkNames) {
if (isDefault) {
this.checkDuplicateExports(node, 'default');
if (this.hasPlugin('exportDefaultFrom')) {
var _declaration$extra;
const declaration = node.declaration;
if (
declaration.type === 'Identifier' &&
declaration.name === 'from' &&
declaration.end - declaration.start === 4 &&
!(
(_declaration$extra = declaration.extra) != null &&
_declaration$extra.parenthesized
)
) {
this.raise(Errors.ExportDefaultFromAsIdentifier, {
at: declaration,
});
}
}
} else if (node.specifiers && node.specifiers.length) {
for (const specifier of node.specifiers) {
const { exported } = specifier;
const exportName =
exported.type === 'Identifier' ? exported.name : exported.value;
this.checkDuplicateExports(specifier, exportName);
if (!isFrom && specifier.local) {
const { local } = specifier;
if (local.type !== 'Identifier') {
this.raise(Errors.ExportBindingIsString, {
at: specifier,
localName: local.value,
exportName,
});
} else {
this.checkReservedWord(local.name, local.loc.start, true, false);
this.scope.checkLocalExport(local);
}
}
}
} else if (node.declaration) {
if (
node.declaration.type === 'FunctionDeclaration' ||
node.declaration.type === 'ClassDeclaration'
) {
const id = node.declaration.id;
if (!id) throw new Error('Assertion failure');
this.checkDuplicateExports(node, id.name);
} else if (node.declaration.type === 'VariableDeclaration') {
for (const declaration of node.declaration.declarations) {
this.checkDeclaration(declaration.id);
}
}
}
}
const currentContextDecorators =
this.state.decoratorStack[this.state.decoratorStack.length - 1];
if (currentContextDecorators.length) {
throw this.raise(Errors.UnsupportedDecoratorExport, {
at: node,
});
}
}
checkDeclaration(node) {
if (node.type === 'Identifier') {
this.checkDuplicateExports(node, node.name);
} else if (node.type === 'ObjectPattern') {
for (const prop of node.properties) {
this.checkDeclaration(prop);
}
} else if (node.type === 'ArrayPattern') {
for (const elem of node.elements) {
if (elem) {
this.checkDeclaration(elem);
}
}
} else if (node.type === 'ObjectProperty') {
this.checkDeclaration(node.value);
} else if (node.type === 'RestElement') {
this.checkDeclaration(node.argument);
} else if (node.type === 'AssignmentPattern') {
this.checkDeclaration(node.left);
}
}
checkDuplicateExports(node, exportName) {
if (this.exportedIdentifiers.has(exportName)) {
if (exportName === 'default') {
this.raise(Errors.DuplicateDefaultExport, {
at: node,
});
} else {
this.raise(Errors.DuplicateExport, {
at: node,
exportName,
});
}
}
this.exportedIdentifiers.add(exportName);
}
parseExportSpecifiers(isInTypeExport) {
const nodes = [];
let first = true;
this.expect(5);
while (!this.eat(8)) {
if (first) {
first = false;
} else {
this.expect(12);
if (this.eat(8)) break;
}
const isMaybeTypeOnly = this.isContextual(126);
const isString = this.match(129);
const node = this.startNode();
node.local = this.parseModuleExportName();
nodes.push(
this.parseExportSpecifier(
node,
isString,
isInTypeExport,
isMaybeTypeOnly
)
);
}
return nodes;
}
parseExportSpecifier(node, isString, isInTypeExport, isMaybeTypeOnly) {
if (this.eatContextual(93)) {
node.exported = this.parseModuleExportName();
} else if (isString) {
node.exported = cloneStringLiteral(node.local);
} else if (!node.exported) {
node.exported = cloneIdentifier(node.local);
}
return this.finishNode(node, 'ExportSpecifier');
}
parseModuleExportName() {
if (this.match(129)) {
const result = this.parseStringLiteral(this.state.value);
const surrogate = result.value.match(loneSurrogate);
if (surrogate) {
this.raise(Errors.ModuleExportNameHasLoneSurrogate, {
at: result,
surrogateCharCode: surrogate[0].charCodeAt(0),
});
}
return result;
}
return this.parseIdentifier(true);
}
parseImport(node) {
node.specifiers = [];
if (!this.match(129)) {
const hasDefault = this.maybeParseDefaultImportSpecifier(node);
const parseNext = !hasDefault || this.eat(12);
const hasStar = parseNext && this.maybeParseStarImportSpecifier(node);
if (parseNext && !hasStar) this.parseNamedImportSpecifiers(node);
this.expectContextual(97);
}
node.source = this.parseImportSource();
const assertions = this.maybeParseImportAssertions();
if (assertions) {
node.assertions = assertions;
} else {
const attributes = this.maybeParseModuleAttributes();
if (attributes) {
node.attributes = attributes;
}
}
this.semicolon();
return this.finishNode(node, 'ImportDeclaration');
}
parseImportSource() {
if (!this.match(129)) this.unexpected();
return this.parseExprAtom();
}
shouldParseDefaultImport(node) {
return tokenIsIdentifier(this.state.type);
}
parseImportSpecifierLocal(node, specifier, type) {
specifier.local = this.parseIdentifier();
node.specifiers.push(this.finishImportSpecifier(specifier, type));
}
finishImportSpecifier(specifier, type) {
this.checkLVal(specifier.local, {
in: specifier,
binding: BIND_LEXICAL,
});
return this.finishNode(specifier, type);
}
parseAssertEntries() {
const attrs = [];
const attrNames = new Set();
do {
if (this.match(8)) {
break;
}
const node = this.startNode();
const keyName = this.state.value;
if (attrNames.has(keyName)) {
this.raise(Errors.ModuleAttributesWithDuplicateKeys, {
at: this.state.startLoc,
key: keyName,
});
}
attrNames.add(keyName);
if (this.match(129)) {
node.key = this.parseStringLiteral(keyName);
} else {
node.key = this.parseIdentifier(true);
}
this.expect(14);
if (!this.match(129)) {
throw this.raise(Errors.ModuleAttributeInvalidValue, {
at: this.state.startLoc,
});
}
node.value = this.parseStringLiteral(this.state.value);
this.finishNode(node, 'ImportAttribute');
attrs.push(node);
} while (this.eat(12));
return attrs;
}
maybeParseModuleAttributes() {
if (this.match(76) && !this.hasPrecedingLineBreak()) {
this.expectPlugin('moduleAttributes');
this.next();
} else {
if (this.hasPlugin('moduleAttributes')) return [];
return null;
}
const attrs = [];
const attributes = new Set();
do {
const node = this.startNode();
node.key = this.parseIdentifier(true);
if (node.key.name !== 'type') {
this.raise(Errors.ModuleAttributeDifferentFromType, {
at: node.key,
});
}
if (attributes.has(node.key.name)) {
this.raise(Errors.ModuleAttributesWithDuplicateKeys, {
at: node.key,
key: node.key.name,
});
}
attributes.add(node.key.name);
this.expect(14);
if (!this.match(129)) {
throw this.raise(Errors.ModuleAttributeInvalidValue, {
at: this.state.startLoc,
});
}
node.value = this.parseStringLiteral(this.state.value);
this.finishNode(node, 'ImportAttribute');
attrs.push(node);
} while (this.eat(12));
return attrs;
}
maybeParseImportAssertions() {
if (this.isContextual(94) && !this.hasPrecedingLineBreak()) {
this.expectPlugin('importAssertions');
this.next();
} else {
if (this.hasPlugin('importAssertions')) return [];
return null;
}
this.eat(5);
const attrs = this.parseAssertEntries();
this.eat(8);
return attrs;
}
maybeParseDefaultImportSpecifier(node) {
if (this.shouldParseDefaultImport(node)) {
this.parseImportSpecifierLocal(
node,
this.startNode(),
'ImportDefaultSpecifier'
);
return true;
}
return false;
}
maybeParseStarImportSpecifier(node) {
if (this.match(55)) {
const specifier = this.startNode();
this.next();
this.expectContextual(93);
this.parseImportSpecifierLocal(
node,
specifier,
'ImportNamespaceSpecifier'
);
return true;
}
return false;
}
parseNamedImportSpecifiers(node) {
let first = true;
this.expect(5);
while (!this.eat(8)) {
if (first) {
first = false;
} else {
if (this.eat(14)) {
throw this.raise(Errors.DestructureNamedImport, {
at: this.state.startLoc,
});
}
this.expect(12);
if (this.eat(8)) break;
}
const specifier = this.startNode();
const importedIsString = this.match(129);
const isMaybeTypeOnly = this.isContextual(126);
specifier.imported = this.parseModuleExportName();
const importSpecifier = this.parseImportSpecifier(
specifier,
importedIsString,
node.importKind === 'type' || node.importKind === 'typeof',
isMaybeTypeOnly
);
node.specifiers.push(importSpecifier);
}
}
parseImportSpecifier(
specifier,
importedIsString,
isInTypeOnlyImport,
isMaybeTypeOnly
) {
if (this.eatContextual(93)) {
specifier.local = this.parseIdentifier();
} else {
const { imported } = specifier;
if (importedIsString) {
throw this.raise(Errors.ImportBindingIsString, {
at: specifier,
importName: imported.value,
});
}
this.checkReservedWord(imported.name, specifier.loc.start, true, true);
if (!specifier.local) {
specifier.local = cloneIdentifier(imported);
}
}
return this.finishImportSpecifier(specifier, 'ImportSpecifier');
}
isThisParam(param) {
return param.type === 'Identifier' && param.name === 'this';
}
}
class Parser extends StatementParser {
constructor(options, input) {
options = getOptions(options);
super(options, input);
this.options = options;
this.initializeScopes();
this.plugins = pluginsMap(this.options.plugins);
this.filename = options.sourceFilename;
}
getScopeHandler() {
return ScopeHandler;
}
parse() {
this.enterInitialScopes();
const file = this.startNode();
const program = this.startNode();
this.nextToken();
file.errors = null;
this.parseTopLevel(file, program);
file.errors = this.state.errors;
return file;
}
}
function pluginsMap(plugins) {
const pluginMap = new Map();
for (const plugin of plugins) {
const [name, options] = Array.isArray(plugin) ? plugin : [plugin, {}];
if (!pluginMap.has(name)) pluginMap.set(name, options || {});
}
return pluginMap;
}
function parse(input, options) {
var _options;
if (
((_options = options) == null ? void 0 : _options.sourceType) ===
'unambiguous'
) {
options = Object.assign({}, options);
try {
options.sourceType = 'module';
const parser = getParser(options, input);
const ast = parser.parse();
if (parser.sawUnambiguousESM) {
return ast;
}
if (parser.ambiguousScriptDifferentAst) {
try {
options.sourceType = 'script';
return getParser(options, input).parse();
} catch (_unused) {}
} else {
ast.program.sourceType = 'script';
}
return ast;
} catch (moduleError) {
try {
options.sourceType = 'script';
return getParser(options, input).parse();
} catch (_unused2) {}
throw moduleError;
}
} else {
return getParser(options, input).parse();
}
}
function parseExpression(input, options) {
const parser = getParser(options, input);
if (parser.options.strictMode) {
parser.state.strict = true;
}
return parser.getExpression();
}
function generateExportedTokenTypes(internalTokenTypes) {
const tokenTypes = {};
for (const typeName of Object.keys(internalTokenTypes)) {
tokenTypes[typeName] = getExportedToken(internalTokenTypes[typeName]);
}
return tokenTypes;
}
const tokTypes = generateExportedTokenTypes(tt);
function getParser(options, input) {
let cls = Parser;
if (options != null && options.plugins) {
validatePlugins(options.plugins);
cls = getParserClass(options.plugins);
}
return new cls(options, input);
}
const parserClassCache = {};
function getParserClass(pluginsFromOptions) {
const pluginList = mixinPluginNames.filter((name) =>
hasPlugin(pluginsFromOptions, name)
);
const key = pluginList.join('/');
let cls = parserClassCache[key];
if (!cls) {
cls = Parser;
for (const plugin of pluginList) {
cls = mixinPlugins[plugin](cls);
}
parserClassCache[key] = cls;
}
return cls;
}
exports.parse = parse;
exports.parseExpression = parseExpression;
exports.tokTypes = tokTypes;
//# sourceMappingURL=index.js.map