2680 lines
72 KiB
JavaScript
2680 lines
72 KiB
JavaScript
/***********************************************************************
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A JavaScript tokenizer / parser / beautifier / compressor.
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https://github.com/mishoo/UglifyJS2
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-------------------------------- (C) ---------------------------------
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Author: Mihai Bazon
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<mihai.bazon@gmail.com>
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http://mihai.bazon.net/blog
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Distributed under the BSD license:
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Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above
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copyright notice, this list of conditions and the following
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disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the following
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disclaimer in the documentation and/or other materials
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provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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SUCH DAMAGE.
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***********************************************************************/
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'use strict';
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import {
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defaults,
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makePredicate,
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noop,
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regexp_source_fix,
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sort_regexp_flags,
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return_false,
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return_true,
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} from './utils/index.js';
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import {
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first_in_statement,
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left_is_object,
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} from './utils/first_in_statement.js';
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import {
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AST_Array,
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AST_Arrow,
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AST_Assign,
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AST_Await,
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AST_BigInt,
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AST_Binary,
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AST_BlockStatement,
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AST_Break,
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AST_Call,
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AST_Case,
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AST_Catch,
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AST_Chain,
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AST_Class,
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AST_ClassExpression,
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AST_ClassPrivateProperty,
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AST_ClassProperty,
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AST_ClassStaticBlock,
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AST_ConciseMethod,
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AST_PrivateGetter,
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AST_PrivateMethod,
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AST_SymbolPrivateProperty,
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AST_PrivateSetter,
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AST_PrivateIn,
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AST_Conditional,
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AST_Const,
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AST_Constant,
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AST_Continue,
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AST_Debugger,
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AST_Default,
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AST_DefaultAssign,
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AST_Definitions,
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AST_Defun,
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AST_Destructuring,
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AST_Directive,
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AST_Do,
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AST_Dot,
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AST_DotHash,
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AST_EmptyStatement,
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AST_Exit,
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AST_Expansion,
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AST_Export,
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AST_Finally,
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AST_For,
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AST_ForIn,
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AST_ForOf,
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AST_Function,
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AST_Hole,
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AST_If,
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AST_Import,
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AST_ImportMeta,
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AST_Jump,
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AST_LabeledStatement,
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AST_Lambda,
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AST_Let,
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AST_LoopControl,
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AST_NameMapping,
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AST_New,
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AST_NewTarget,
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AST_Node,
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AST_Number,
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AST_Object,
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AST_ObjectGetter,
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AST_ObjectKeyVal,
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AST_ObjectProperty,
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AST_ObjectSetter,
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AST_PrefixedTemplateString,
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AST_PropAccess,
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AST_RegExp,
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AST_Return,
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AST_Scope,
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AST_Sequence,
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AST_SimpleStatement,
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AST_Statement,
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AST_StatementWithBody,
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AST_String,
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AST_Sub,
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AST_Super,
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AST_Switch,
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AST_SwitchBranch,
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AST_Symbol,
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AST_SymbolClassProperty,
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AST_SymbolMethod,
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AST_SymbolRef,
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AST_TemplateSegment,
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AST_TemplateString,
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AST_This,
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AST_Throw,
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AST_Toplevel,
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AST_Try,
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AST_TryBlock,
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AST_Unary,
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AST_UnaryPostfix,
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AST_UnaryPrefix,
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AST_Var,
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AST_VarDef,
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AST_While,
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AST_With,
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AST_Yield,
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TreeWalker,
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walk,
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walk_abort,
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} from './ast.js';
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import {
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get_full_char_code,
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get_full_char,
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is_identifier_char,
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is_basic_identifier_string,
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is_identifier_string,
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PRECEDENCE,
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ALL_RESERVED_WORDS,
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} from './parse.js';
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const CODE_LINE_BREAK = 10;
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const CODE_SPACE = 32;
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const r_annotation = /[@#]__(PURE|INLINE|NOINLINE)__/;
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function is_some_comments(comment) {
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// multiline comment
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return (
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(comment.type === 'comment2' || comment.type === 'comment1') &&
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/@preserve|@copyright|@lic|@cc_on|^\**!/i.test(comment.value)
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);
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}
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const ROPE_COMMIT_WHEN = 8 * 1000;
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class Rope {
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constructor() {
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this.committed = '';
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this.current = '';
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}
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append(str) {
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/** When `this.current` is too long, commit it. */
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if (this.current.length > ROPE_COMMIT_WHEN) {
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this.committed += this.current + str;
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this.current = '';
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} else {
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this.current += str;
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}
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}
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insertAt(char, index) {
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const { committed, current } = this;
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if (index < committed.length) {
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this.committed =
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committed.slice(0, index) + char + committed.slice(index);
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} else if (index === committed.length) {
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this.committed += char;
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} else {
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index -= committed.length;
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this.committed += current.slice(0, index) + char;
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this.current = current.slice(index);
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}
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}
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charAt(index) {
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const { committed } = this;
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if (index < committed.length) return committed[index];
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return this.current[index - committed.length];
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}
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charCodeAt(index) {
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const { committed } = this;
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if (index < committed.length) return committed.charCodeAt(index);
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return this.current.charCodeAt(index - committed.length);
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}
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length() {
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return this.committed.length + this.current.length;
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}
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expectDirective() {
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// /^$|[;{][\s\n]*$/
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let ch,
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n = this.length();
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if (n <= 0) return true;
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// Skip N whitespace from the end
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while (
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(ch = this.charCodeAt(--n)) &&
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(ch == CODE_SPACE || ch == CODE_LINE_BREAK)
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);
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// either ";", or "{", or the string ended
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return !ch || ch === 59 || ch === 123;
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}
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hasNLB() {
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let n = this.length() - 1;
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while (n >= 0) {
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const code = this.charCodeAt(n--);
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if (code === CODE_LINE_BREAK) return true;
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if (code !== CODE_SPACE) return false;
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}
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return true;
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}
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toString() {
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return this.committed + this.current;
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}
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}
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function OutputStream(options) {
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var readonly = !options;
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options = defaults(
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options,
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{
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ascii_only: false,
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beautify: false,
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braces: false,
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comments: 'some',
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ecma: 5,
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ie8: false,
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indent_level: 4,
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indent_start: 0,
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inline_script: true,
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keep_numbers: false,
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keep_quoted_props: false,
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max_line_len: false,
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preamble: null,
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preserve_annotations: false,
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quote_keys: false,
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quote_style: 0,
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safari10: false,
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semicolons: true,
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shebang: true,
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shorthand: undefined,
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source_map: null,
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webkit: false,
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width: 80,
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wrap_iife: false,
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wrap_func_args: true,
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_destroy_ast: false,
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},
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true
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);
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if (options.shorthand === undefined) options.shorthand = options.ecma > 5;
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// Convert comment option to RegExp if necessary and set up comments filter
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var comment_filter = return_false; // Default case, throw all comments away
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if (options.comments) {
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let comments = options.comments;
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if (
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typeof options.comments === 'string' &&
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/^\/.*\/[a-zA-Z]*$/.test(options.comments)
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) {
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var regex_pos = options.comments.lastIndexOf('/');
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comments = new RegExp(
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options.comments.substr(1, regex_pos - 1),
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options.comments.substr(regex_pos + 1)
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);
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}
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if (comments instanceof RegExp) {
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comment_filter = function (comment) {
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return comment.type != 'comment5' && comments.test(comment.value);
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};
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} else if (typeof comments === 'function') {
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comment_filter = function (comment) {
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return comment.type != 'comment5' && comments(this, comment);
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};
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} else if (comments === 'some') {
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comment_filter = is_some_comments;
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} else {
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// NOTE includes "all" option
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comment_filter = return_true;
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}
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}
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if (options.preserve_annotations) {
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let prev_comment_filter = comment_filter;
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comment_filter = function (comment) {
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return (
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r_annotation.test(comment.value) ||
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prev_comment_filter.apply(this, arguments)
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);
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};
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}
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var indentation = 0;
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var current_col = 0;
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var current_line = 1;
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var current_pos = 0;
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var OUTPUT = new Rope();
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let printed_comments = new Set();
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var to_utf8 =
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options.ascii_only ?
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function (str, identifier = false, regexp = false) {
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if (options.ecma >= 2015 && !options.safari10 && !regexp) {
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str = str.replace(/[\ud800-\udbff][\udc00-\udfff]/g, function (ch) {
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var code = get_full_char_code(ch, 0).toString(16);
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return '\\u{' + code + '}';
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});
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}
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return str.replace(/[\u0000-\u001f\u007f-\uffff]/g, function (ch) {
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var code = ch.charCodeAt(0).toString(16);
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if (code.length <= 2 && !identifier) {
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while (code.length < 2) code = '0' + code;
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return '\\x' + code;
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} else {
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while (code.length < 4) code = '0' + code;
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return '\\u' + code;
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}
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});
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}
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: function (str) {
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return str.replace(
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/[\ud800-\udbff][\udc00-\udfff]|([\ud800-\udbff]|[\udc00-\udfff])/g,
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function (match, lone) {
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if (lone) {
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return '\\u' + lone.charCodeAt(0).toString(16);
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}
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return match;
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}
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);
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};
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function make_string(str, quote) {
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var dq = 0,
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sq = 0;
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str = str.replace(
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/[\\\b\f\n\r\v\t\x22\x27\u2028\u2029\0\ufeff]/g,
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function (s, i) {
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switch (s) {
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case '"':
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++dq;
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return '"';
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case "'":
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++sq;
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return "'";
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case '\\':
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return '\\\\';
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case '\n':
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return '\\n';
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case '\r':
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return '\\r';
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case '\t':
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return '\\t';
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case '\b':
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return '\\b';
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case '\f':
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return '\\f';
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case '\x0B':
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return options.ie8 ? '\\x0B' : '\\v';
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case '\u2028':
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return '\\u2028';
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case '\u2029':
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return '\\u2029';
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case '\ufeff':
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return '\\ufeff';
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case '\0':
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return /[0-9]/.test(get_full_char(str, i + 1)) ? '\\x00' : '\\0';
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}
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return s;
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}
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);
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function quote_single() {
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return "'" + str.replace(/\x27/g, "\\'") + "'";
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}
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function quote_double() {
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return '"' + str.replace(/\x22/g, '\\"') + '"';
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}
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function quote_template() {
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return '`' + str.replace(/`/g, '\\`') + '`';
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}
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str = to_utf8(str);
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if (quote === '`') return quote_template();
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switch (options.quote_style) {
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case 1:
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return quote_single();
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case 2:
|
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return quote_double();
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case 3:
|
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return quote == "'" ? quote_single() : quote_double();
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default:
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return dq > sq ? quote_single() : quote_double();
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}
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}
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function encode_string(str, quote) {
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var ret = make_string(str, quote);
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if (options.inline_script) {
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ret = ret.replace(/<\x2f(script)([>\/\t\n\f\r ])/gi, '<\\/$1$2');
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ret = ret.replace(/\x3c!--/g, '\\x3c!--');
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ret = ret.replace(/--\x3e/g, '--\\x3e');
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}
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return ret;
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}
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function make_name(name) {
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name = name.toString();
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name = to_utf8(name, true);
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return name;
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}
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|
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function make_indent(back) {
|
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return ' '.repeat(
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options.indent_start + indentation - back * options.indent_level
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);
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}
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|
|
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/* -----[ beautification/minification ]----- */
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|
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var has_parens = false;
|
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var might_need_space = false;
|
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var might_need_semicolon = false;
|
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var might_add_newline = 0;
|
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var need_newline_indented = false;
|
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var need_space = false;
|
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var newline_insert = -1;
|
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var last = '';
|
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var mapping_token,
|
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mapping_name,
|
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mappings = options.source_map && [];
|
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|
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var do_add_mapping =
|
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mappings ?
|
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function () {
|
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mappings.forEach(function (mapping) {
|
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try {
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let { name, token } = mapping;
|
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if (name !== false) {
|
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if (token.type == 'name' || token.type === 'privatename') {
|
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name = token.value;
|
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} else if (name instanceof AST_Symbol) {
|
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name = token.type === 'string' ? token.value : name.name;
|
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}
|
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}
|
|
options.source_map.add(
|
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mapping.token.file,
|
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mapping.line,
|
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mapping.col,
|
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mapping.token.line,
|
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mapping.token.col,
|
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is_basic_identifier_string(name) ? name : undefined
|
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);
|
|
} catch (ex) {
|
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// Ignore bad mapping
|
|
}
|
|
});
|
|
mappings = [];
|
|
}
|
|
: noop;
|
|
|
|
var ensure_line_len =
|
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options.max_line_len ?
|
|
function () {
|
|
if (current_col > options.max_line_len) {
|
|
if (might_add_newline) {
|
|
OUTPUT.insertAt('\n', might_add_newline);
|
|
const len_after_newline = OUTPUT.length() - might_add_newline - 1;
|
|
if (mappings) {
|
|
var delta = len_after_newline - current_col;
|
|
mappings.forEach(function (mapping) {
|
|
mapping.line++;
|
|
mapping.col += delta;
|
|
});
|
|
}
|
|
current_line++;
|
|
current_pos++;
|
|
current_col = len_after_newline;
|
|
}
|
|
}
|
|
if (might_add_newline) {
|
|
might_add_newline = 0;
|
|
do_add_mapping();
|
|
}
|
|
}
|
|
: noop;
|
|
|
|
var requireSemicolonChars = makePredicate('( [ + * / - , . `');
|
|
|
|
function print(str) {
|
|
str = String(str);
|
|
var ch = get_full_char(str, 0);
|
|
if (need_newline_indented && ch) {
|
|
need_newline_indented = false;
|
|
if (ch !== '\n') {
|
|
print('\n');
|
|
indent();
|
|
}
|
|
}
|
|
if (need_space && ch) {
|
|
need_space = false;
|
|
if (!/[\s;})]/.test(ch)) {
|
|
space();
|
|
}
|
|
}
|
|
newline_insert = -1;
|
|
var prev = last.charAt(last.length - 1);
|
|
if (might_need_semicolon) {
|
|
might_need_semicolon = false;
|
|
|
|
if (
|
|
(prev === ':' && ch === '}') ||
|
|
((!ch || !';}'.includes(ch)) && prev !== ';')
|
|
) {
|
|
if (options.semicolons || requireSemicolonChars.has(ch)) {
|
|
OUTPUT.append(';');
|
|
current_col++;
|
|
current_pos++;
|
|
} else {
|
|
ensure_line_len();
|
|
if (current_col > 0) {
|
|
OUTPUT.append('\n');
|
|
current_pos++;
|
|
current_line++;
|
|
current_col = 0;
|
|
}
|
|
|
|
if (/^\s+$/.test(str)) {
|
|
// reset the semicolon flag, since we didn't print one
|
|
// now and might still have to later
|
|
might_need_semicolon = true;
|
|
}
|
|
}
|
|
|
|
if (!options.beautify) might_need_space = false;
|
|
}
|
|
}
|
|
|
|
if (might_need_space) {
|
|
if (
|
|
(is_identifier_char(prev) && (is_identifier_char(ch) || ch == '\\')) ||
|
|
(ch == '/' && ch == prev) ||
|
|
((ch == '+' || ch == '-') && ch == last)
|
|
) {
|
|
OUTPUT.append(' ');
|
|
current_col++;
|
|
current_pos++;
|
|
}
|
|
might_need_space = false;
|
|
}
|
|
|
|
if (mapping_token) {
|
|
mappings.push({
|
|
token: mapping_token,
|
|
name: mapping_name,
|
|
line: current_line,
|
|
col: current_col,
|
|
});
|
|
mapping_token = false;
|
|
if (!might_add_newline) do_add_mapping();
|
|
}
|
|
|
|
OUTPUT.append(str);
|
|
has_parens = str[str.length - 1] == '(';
|
|
current_pos += str.length;
|
|
var a = str.split(/\r?\n/),
|
|
n = a.length - 1;
|
|
current_line += n;
|
|
current_col += a[0].length;
|
|
if (n > 0) {
|
|
ensure_line_len();
|
|
current_col = a[n].length;
|
|
}
|
|
last = str;
|
|
}
|
|
|
|
var star = function () {
|
|
print('*');
|
|
};
|
|
|
|
var space =
|
|
options.beautify ?
|
|
function () {
|
|
print(' ');
|
|
}
|
|
: function () {
|
|
might_need_space = true;
|
|
};
|
|
|
|
var indent =
|
|
options.beautify ?
|
|
function (half) {
|
|
if (options.beautify) {
|
|
print(make_indent(half ? 0.5 : 0));
|
|
}
|
|
}
|
|
: noop;
|
|
|
|
var with_indent =
|
|
options.beautify ?
|
|
function (col, cont) {
|
|
if (col === true) col = next_indent();
|
|
var save_indentation = indentation;
|
|
indentation = col;
|
|
var ret = cont();
|
|
indentation = save_indentation;
|
|
return ret;
|
|
}
|
|
: function (col, cont) {
|
|
return cont();
|
|
};
|
|
|
|
var newline =
|
|
options.beautify ?
|
|
function () {
|
|
if (newline_insert < 0) return print('\n');
|
|
if (OUTPUT.charAt(newline_insert) != '\n') {
|
|
OUTPUT.insertAt('\n', newline_insert);
|
|
current_pos++;
|
|
current_line++;
|
|
}
|
|
newline_insert++;
|
|
}
|
|
: options.max_line_len ?
|
|
function () {
|
|
ensure_line_len();
|
|
might_add_newline = OUTPUT.length();
|
|
}
|
|
: noop;
|
|
|
|
var semicolon =
|
|
options.beautify ?
|
|
function () {
|
|
print(';');
|
|
}
|
|
: function () {
|
|
might_need_semicolon = true;
|
|
};
|
|
|
|
function force_semicolon() {
|
|
might_need_semicolon = false;
|
|
print(';');
|
|
}
|
|
|
|
function next_indent() {
|
|
return indentation + options.indent_level;
|
|
}
|
|
|
|
function with_block(cont) {
|
|
var ret;
|
|
print('{');
|
|
newline();
|
|
with_indent(next_indent(), function () {
|
|
ret = cont();
|
|
});
|
|
indent();
|
|
print('}');
|
|
return ret;
|
|
}
|
|
|
|
function with_parens(cont) {
|
|
print('(');
|
|
//XXX: still nice to have that for argument lists
|
|
//var ret = with_indent(current_col, cont);
|
|
var ret = cont();
|
|
print(')');
|
|
return ret;
|
|
}
|
|
|
|
function with_square(cont) {
|
|
print('[');
|
|
//var ret = with_indent(current_col, cont);
|
|
var ret = cont();
|
|
print(']');
|
|
return ret;
|
|
}
|
|
|
|
function comma() {
|
|
print(',');
|
|
space();
|
|
}
|
|
|
|
function colon() {
|
|
print(':');
|
|
space();
|
|
}
|
|
|
|
var add_mapping =
|
|
mappings ?
|
|
function (token, name) {
|
|
mapping_token = token;
|
|
mapping_name = name;
|
|
}
|
|
: noop;
|
|
|
|
function get() {
|
|
if (might_add_newline) {
|
|
ensure_line_len();
|
|
}
|
|
return OUTPUT.toString();
|
|
}
|
|
|
|
function filter_comment(comment) {
|
|
if (!options.preserve_annotations) {
|
|
comment = comment.replace(r_annotation, ' ');
|
|
}
|
|
if (/^\s*$/.test(comment)) {
|
|
return '';
|
|
}
|
|
return comment.replace(/(<\s*\/\s*)(script)/i, '<\\/$2');
|
|
}
|
|
|
|
function prepend_comments(node) {
|
|
var self = this;
|
|
var start = node.start;
|
|
if (!start) return;
|
|
var printed_comments = self.printed_comments;
|
|
|
|
// There cannot be a newline between return/yield and its value.
|
|
const keyword_with_value =
|
|
(node instanceof AST_Exit && node.value) ||
|
|
((node instanceof AST_Await || node instanceof AST_Yield) &&
|
|
node.expression);
|
|
|
|
if (start.comments_before && printed_comments.has(start.comments_before)) {
|
|
if (keyword_with_value) {
|
|
start.comments_before = [];
|
|
} else {
|
|
return;
|
|
}
|
|
}
|
|
|
|
var comments = start.comments_before;
|
|
if (!comments) {
|
|
comments = start.comments_before = [];
|
|
}
|
|
printed_comments.add(comments);
|
|
|
|
if (keyword_with_value) {
|
|
var tw = new TreeWalker(function (node) {
|
|
var parent = tw.parent();
|
|
if (
|
|
parent instanceof AST_Exit ||
|
|
parent instanceof AST_Await ||
|
|
parent instanceof AST_Yield ||
|
|
(parent instanceof AST_Binary && parent.left === node) ||
|
|
(parent.TYPE == 'Call' && parent.expression === node) ||
|
|
(parent instanceof AST_Conditional && parent.condition === node) ||
|
|
(parent instanceof AST_Dot && parent.expression === node) ||
|
|
(parent instanceof AST_Sequence && parent.expressions[0] === node) ||
|
|
(parent instanceof AST_Sub && parent.expression === node) ||
|
|
parent instanceof AST_UnaryPostfix
|
|
) {
|
|
if (!node.start) return;
|
|
var text = node.start.comments_before;
|
|
if (text && !printed_comments.has(text)) {
|
|
printed_comments.add(text);
|
|
comments = comments.concat(text);
|
|
}
|
|
} else {
|
|
return true;
|
|
}
|
|
});
|
|
tw.push(node);
|
|
keyword_with_value.walk(tw);
|
|
}
|
|
|
|
if (current_pos == 0) {
|
|
if (
|
|
comments.length > 0 &&
|
|
options.shebang &&
|
|
comments[0].type === 'comment5' &&
|
|
!printed_comments.has(comments[0])
|
|
) {
|
|
print('#!' + comments.shift().value + '\n');
|
|
indent();
|
|
}
|
|
var preamble = options.preamble;
|
|
if (preamble) {
|
|
print(preamble.replace(/\r\n?|[\n\u2028\u2029]|\s*$/g, '\n'));
|
|
}
|
|
}
|
|
|
|
comments = comments
|
|
.filter(comment_filter, node)
|
|
.filter((c) => !printed_comments.has(c));
|
|
if (comments.length == 0) return;
|
|
var last_nlb = OUTPUT.hasNLB();
|
|
comments.forEach(function (c, i) {
|
|
printed_comments.add(c);
|
|
if (!last_nlb) {
|
|
if (c.nlb) {
|
|
print('\n');
|
|
indent();
|
|
last_nlb = true;
|
|
} else if (i > 0) {
|
|
space();
|
|
}
|
|
}
|
|
|
|
if (/comment[134]/.test(c.type)) {
|
|
var value = filter_comment(c.value);
|
|
if (value) {
|
|
print('//' + value + '\n');
|
|
indent();
|
|
}
|
|
last_nlb = true;
|
|
} else if (c.type == 'comment2') {
|
|
var value = filter_comment(c.value);
|
|
if (value) {
|
|
print('/*' + value + '*/');
|
|
}
|
|
last_nlb = false;
|
|
}
|
|
});
|
|
if (!last_nlb) {
|
|
if (start.nlb) {
|
|
print('\n');
|
|
indent();
|
|
} else {
|
|
space();
|
|
}
|
|
}
|
|
}
|
|
|
|
function append_comments(node, tail) {
|
|
var self = this;
|
|
var token = node.end;
|
|
if (!token) return;
|
|
var printed_comments = self.printed_comments;
|
|
var comments = token[tail ? 'comments_before' : 'comments_after'];
|
|
if (!comments || printed_comments.has(comments)) return;
|
|
if (
|
|
!(
|
|
node instanceof AST_Statement ||
|
|
comments.every((c) => !/comment[134]/.test(c.type))
|
|
)
|
|
)
|
|
return;
|
|
printed_comments.add(comments);
|
|
var insert = OUTPUT.length();
|
|
comments.filter(comment_filter, node).forEach(function (c, i) {
|
|
if (printed_comments.has(c)) return;
|
|
printed_comments.add(c);
|
|
need_space = false;
|
|
if (need_newline_indented) {
|
|
print('\n');
|
|
indent();
|
|
need_newline_indented = false;
|
|
} else if (c.nlb && (i > 0 || !OUTPUT.hasNLB())) {
|
|
print('\n');
|
|
indent();
|
|
} else if (i > 0 || !tail) {
|
|
space();
|
|
}
|
|
if (/comment[134]/.test(c.type)) {
|
|
const value = filter_comment(c.value);
|
|
if (value) {
|
|
print('//' + value);
|
|
}
|
|
need_newline_indented = true;
|
|
} else if (c.type == 'comment2') {
|
|
const value = filter_comment(c.value);
|
|
if (value) {
|
|
print('/*' + value + '*/');
|
|
}
|
|
need_space = true;
|
|
}
|
|
});
|
|
if (OUTPUT.length() > insert) newline_insert = insert;
|
|
}
|
|
|
|
/**
|
|
* When output.option("_destroy_ast") is enabled, destroy the function.
|
|
* Call this after printing it.
|
|
*/
|
|
const gc_scope =
|
|
options['_destroy_ast'] ?
|
|
function gc_scope(scope) {
|
|
scope.body.length = 0;
|
|
scope.argnames.length = 0;
|
|
}
|
|
: noop;
|
|
|
|
var stack = [];
|
|
return {
|
|
get: get,
|
|
toString: get,
|
|
indent: indent,
|
|
in_directive: false,
|
|
use_asm: null,
|
|
active_scope: null,
|
|
indentation: function () {
|
|
return indentation;
|
|
},
|
|
current_width: function () {
|
|
return current_col - indentation;
|
|
},
|
|
should_break: function () {
|
|
return options.width && this.current_width() >= options.width;
|
|
},
|
|
has_parens: function () {
|
|
return has_parens;
|
|
},
|
|
newline: newline,
|
|
print: print,
|
|
star: star,
|
|
space: space,
|
|
comma: comma,
|
|
colon: colon,
|
|
last: function () {
|
|
return last;
|
|
},
|
|
semicolon: semicolon,
|
|
force_semicolon: force_semicolon,
|
|
to_utf8: to_utf8,
|
|
print_name: function (name) {
|
|
print(make_name(name));
|
|
},
|
|
print_string: function (str, quote, escape_directive) {
|
|
var encoded = encode_string(str, quote);
|
|
if (escape_directive === true && !encoded.includes('\\')) {
|
|
// Insert semicolons to break directive prologue
|
|
if (!OUTPUT.expectDirective()) {
|
|
force_semicolon();
|
|
}
|
|
force_semicolon();
|
|
}
|
|
print(encoded);
|
|
},
|
|
print_template_string_chars: function (str) {
|
|
var encoded = encode_string(str, '`').replace(/\${/g, '\\${');
|
|
return print(encoded.substr(1, encoded.length - 2));
|
|
},
|
|
encode_string: encode_string,
|
|
next_indent: next_indent,
|
|
with_indent: with_indent,
|
|
with_block: with_block,
|
|
with_parens: with_parens,
|
|
with_square: with_square,
|
|
add_mapping: add_mapping,
|
|
option: function (opt) {
|
|
return options[opt];
|
|
},
|
|
gc_scope,
|
|
printed_comments: printed_comments,
|
|
prepend_comments: readonly ? noop : prepend_comments,
|
|
append_comments:
|
|
readonly || comment_filter === return_false ? noop : append_comments,
|
|
line: function () {
|
|
return current_line;
|
|
},
|
|
col: function () {
|
|
return current_col;
|
|
},
|
|
pos: function () {
|
|
return current_pos;
|
|
},
|
|
push_node: function (node) {
|
|
stack.push(node);
|
|
},
|
|
pop_node: function () {
|
|
return stack.pop();
|
|
},
|
|
parent: function (n) {
|
|
return stack[stack.length - 2 - (n || 0)];
|
|
},
|
|
};
|
|
}
|
|
|
|
/* -----[ code generators ]----- */
|
|
|
|
(function () {
|
|
/* -----[ utils ]----- */
|
|
|
|
function DEFPRINT(nodetype, generator) {
|
|
nodetype.DEFMETHOD('_codegen', generator);
|
|
}
|
|
|
|
AST_Node.DEFMETHOD('print', function (output, force_parens) {
|
|
var self = this,
|
|
generator = self._codegen;
|
|
if (self instanceof AST_Scope) {
|
|
output.active_scope = self;
|
|
} else if (
|
|
!output.use_asm &&
|
|
self instanceof AST_Directive &&
|
|
self.value == 'use asm'
|
|
) {
|
|
output.use_asm = output.active_scope;
|
|
}
|
|
function doit() {
|
|
output.prepend_comments(self);
|
|
self.add_source_map(output);
|
|
generator(self, output);
|
|
output.append_comments(self);
|
|
}
|
|
output.push_node(self);
|
|
if (force_parens || self.needs_parens(output)) {
|
|
output.with_parens(doit);
|
|
} else {
|
|
doit();
|
|
}
|
|
output.pop_node();
|
|
if (self === output.use_asm) {
|
|
output.use_asm = null;
|
|
}
|
|
});
|
|
AST_Node.DEFMETHOD('_print', AST_Node.prototype.print);
|
|
|
|
AST_Node.DEFMETHOD('print_to_string', function (options) {
|
|
var output = OutputStream(options);
|
|
this.print(output);
|
|
return output.get();
|
|
});
|
|
|
|
/* -----[ PARENTHESES ]----- */
|
|
|
|
function PARENS(nodetype, func) {
|
|
if (Array.isArray(nodetype)) {
|
|
nodetype.forEach(function (nodetype) {
|
|
PARENS(nodetype, func);
|
|
});
|
|
} else {
|
|
nodetype.DEFMETHOD('needs_parens', func);
|
|
}
|
|
}
|
|
|
|
PARENS(AST_Node, return_false);
|
|
|
|
// a function expression needs parens around it when it's provably
|
|
// the first token to appear in a statement.
|
|
PARENS(AST_Function, function (output) {
|
|
if (!output.has_parens() && first_in_statement(output)) {
|
|
return true;
|
|
}
|
|
|
|
if (output.option('webkit')) {
|
|
var p = output.parent();
|
|
if (p instanceof AST_PropAccess && p.expression === this) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
if (output.option('wrap_iife')) {
|
|
var p = output.parent();
|
|
if (p instanceof AST_Call && p.expression === this) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
if (output.option('wrap_func_args')) {
|
|
var p = output.parent();
|
|
if (p instanceof AST_Call && p.args.includes(this)) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
});
|
|
|
|
PARENS(AST_Arrow, function (output) {
|
|
var p = output.parent();
|
|
|
|
if (
|
|
output.option('wrap_func_args') &&
|
|
p instanceof AST_Call &&
|
|
p.args.includes(this)
|
|
) {
|
|
return true;
|
|
}
|
|
return (
|
|
(p instanceof AST_PropAccess && p.expression === this) ||
|
|
(p instanceof AST_Conditional && p.condition === this)
|
|
);
|
|
});
|
|
|
|
// same goes for an object literal (as in AST_Function), because
|
|
// otherwise {...} would be interpreted as a block of code.
|
|
PARENS(AST_Object, function (output) {
|
|
return !output.has_parens() && first_in_statement(output);
|
|
});
|
|
|
|
PARENS(AST_ClassExpression, first_in_statement);
|
|
|
|
PARENS(AST_Unary, function (output) {
|
|
var p = output.parent();
|
|
return (
|
|
(p instanceof AST_PropAccess && p.expression === this) ||
|
|
(p instanceof AST_Call && p.expression === this) ||
|
|
(p instanceof AST_Binary &&
|
|
p.operator === '**' &&
|
|
this instanceof AST_UnaryPrefix &&
|
|
p.left === this &&
|
|
this.operator !== '++' &&
|
|
this.operator !== '--')
|
|
);
|
|
});
|
|
|
|
PARENS(AST_Await, function (output) {
|
|
var p = output.parent();
|
|
return (
|
|
(p instanceof AST_PropAccess && p.expression === this) ||
|
|
(p instanceof AST_Call && p.expression === this) ||
|
|
(p instanceof AST_Binary && p.operator === '**' && p.left === this) ||
|
|
(output.option('safari10') && p instanceof AST_UnaryPrefix)
|
|
);
|
|
});
|
|
|
|
PARENS(AST_Sequence, function (output) {
|
|
var p = output.parent();
|
|
return (
|
|
p instanceof AST_Call || // (foo, bar)() or foo(1, (2, 3), 4)
|
|
p instanceof AST_Unary || // !(foo, bar, baz)
|
|
p instanceof AST_Binary || // 1 + (2, 3) + 4 ==> 8
|
|
p instanceof AST_VarDef || // var a = (1, 2), b = a + a; ==> b == 4
|
|
p instanceof AST_PropAccess || // (1, {foo:2}).foo or (1, {foo:2})["foo"] ==> 2
|
|
p instanceof AST_Array || // [ 1, (2, 3), 4 ] ==> [ 1, 3, 4 ]
|
|
p instanceof AST_ObjectProperty || // { foo: (1, 2) }.foo ==> 2
|
|
p instanceof
|
|
AST_Conditional /* (false, true) ? (a = 10, b = 20) : (c = 30)
|
|
* ==> 20 (side effect, set a := 10 and b := 20) */ ||
|
|
p instanceof AST_Arrow || // x => (x, x)
|
|
p instanceof AST_DefaultAssign || // x => (x = (0, function(){}))
|
|
p instanceof AST_Expansion || // [...(a, b)]
|
|
(p instanceof AST_ForOf && this === p.object) || // for (e of (foo, bar)) {}
|
|
p instanceof AST_Yield || // yield (foo, bar)
|
|
p instanceof AST_Export // export default (foo, bar)
|
|
);
|
|
});
|
|
|
|
PARENS(AST_Binary, function (output) {
|
|
var p = output.parent();
|
|
// (foo && bar)()
|
|
if (p instanceof AST_Call && p.expression === this) return true;
|
|
// typeof (foo && bar)
|
|
if (p instanceof AST_Unary) return true;
|
|
// (foo && bar)["prop"], (foo && bar).prop
|
|
if (p instanceof AST_PropAccess && p.expression === this) return true;
|
|
// this deals with precedence: 3 * (2 + 1)
|
|
if (p instanceof AST_Binary) {
|
|
const parent_op = p.operator;
|
|
const op = this.operator;
|
|
|
|
// It is forbidden for ?? to be used with || or && without parens.
|
|
if (op === '??' && (parent_op === '||' || parent_op === '&&')) {
|
|
return true;
|
|
}
|
|
if (parent_op === '??' && (op === '||' || op === '&&')) {
|
|
return true;
|
|
}
|
|
|
|
const pp = PRECEDENCE[parent_op];
|
|
const sp = PRECEDENCE[op];
|
|
if (pp > sp || (pp == sp && (this === p.right || parent_op == '**'))) {
|
|
return true;
|
|
}
|
|
}
|
|
if (p instanceof AST_PrivateIn) {
|
|
const op = this.operator;
|
|
|
|
const pp = PRECEDENCE['in'];
|
|
const sp = PRECEDENCE[op];
|
|
if (pp > sp || (pp == sp && this === p.value)) {
|
|
return true;
|
|
}
|
|
}
|
|
});
|
|
|
|
PARENS(AST_PrivateIn, function (output) {
|
|
var p = output.parent();
|
|
// (#x in this)()
|
|
if (p instanceof AST_Call && p.expression === this) {
|
|
return true;
|
|
}
|
|
// typeof (#x in this)
|
|
if (p instanceof AST_Unary) {
|
|
return true;
|
|
}
|
|
// (#x in this)["prop"], (#x in this).prop
|
|
if (p instanceof AST_PropAccess && p.expression === this) {
|
|
return true;
|
|
}
|
|
// same precedence as regular in operator
|
|
if (p instanceof AST_Binary) {
|
|
const parent_op = p.operator;
|
|
|
|
const pp = PRECEDENCE[parent_op];
|
|
const sp = PRECEDENCE['in'];
|
|
if (pp > sp || (pp == sp && (this === p.right || parent_op == '**'))) {
|
|
return true;
|
|
}
|
|
}
|
|
// rules are the same as binary in, but the class differs
|
|
if (p instanceof AST_PrivateIn && this === p.value) {
|
|
return true;
|
|
}
|
|
});
|
|
|
|
PARENS(AST_Yield, function (output) {
|
|
var p = output.parent();
|
|
// (yield 1) + (yield 2)
|
|
// a = yield 3
|
|
if (p instanceof AST_Binary && p.operator !== '=') return true;
|
|
// (yield 1)()
|
|
// new (yield 1)()
|
|
if (p instanceof AST_Call && p.expression === this) return true;
|
|
// (yield 1) ? yield 2 : yield 3
|
|
if (p instanceof AST_Conditional && p.condition === this) return true;
|
|
// -(yield 4)
|
|
if (p instanceof AST_Unary) return true;
|
|
// (yield x).foo
|
|
// (yield x)['foo']
|
|
if (p instanceof AST_PropAccess && p.expression === this) return true;
|
|
});
|
|
|
|
PARENS(AST_Chain, function (output) {
|
|
var p = output.parent();
|
|
if (!(p instanceof AST_Call || p instanceof AST_PropAccess)) return false;
|
|
return p.expression === this;
|
|
});
|
|
|
|
PARENS(AST_PropAccess, function (output) {
|
|
var p = output.parent();
|
|
if (p instanceof AST_New && p.expression === this) {
|
|
// i.e. new (foo.bar().baz)
|
|
//
|
|
// if there's one call into this subtree, then we need
|
|
// parens around it too, otherwise the call will be
|
|
// interpreted as passing the arguments to the upper New
|
|
// expression.
|
|
return walk(this, (node) => {
|
|
if (node instanceof AST_Scope) return true;
|
|
if (node instanceof AST_Call) {
|
|
return walk_abort; // makes walk() return true.
|
|
}
|
|
});
|
|
}
|
|
});
|
|
|
|
PARENS(AST_Call, function (output) {
|
|
var p = output.parent(),
|
|
p1;
|
|
if (
|
|
(p instanceof AST_New && p.expression === this) ||
|
|
(p instanceof AST_Export &&
|
|
p.is_default &&
|
|
this.expression instanceof AST_Function)
|
|
)
|
|
return true;
|
|
|
|
// workaround for Safari bug.
|
|
// https://bugs.webkit.org/show_bug.cgi?id=123506
|
|
return (
|
|
this.expression instanceof AST_Function &&
|
|
p instanceof AST_PropAccess &&
|
|
p.expression === this &&
|
|
(p1 = output.parent(1)) instanceof AST_Assign &&
|
|
p1.left === p
|
|
);
|
|
});
|
|
|
|
PARENS(AST_New, function (output) {
|
|
var p = output.parent();
|
|
if (
|
|
this.args.length === 0 &&
|
|
(p instanceof AST_PropAccess || // (new Date).getTime(), (new Date)["getTime"]()
|
|
(p instanceof AST_Call && p.expression === this) ||
|
|
(p instanceof AST_PrefixedTemplateString && p.prefix === this))
|
|
)
|
|
// (new foo)(bar)
|
|
return true;
|
|
});
|
|
|
|
PARENS(AST_Number, function (output) {
|
|
var p = output.parent();
|
|
if (p instanceof AST_PropAccess && p.expression === this) {
|
|
var value = this.getValue();
|
|
if (value < 0 || /^0/.test(make_num(value))) {
|
|
return true;
|
|
}
|
|
}
|
|
});
|
|
|
|
PARENS(AST_BigInt, function (output) {
|
|
var p = output.parent();
|
|
if (p instanceof AST_PropAccess && p.expression === this) {
|
|
var value = this.getValue();
|
|
if (value.startsWith('-')) {
|
|
return true;
|
|
}
|
|
}
|
|
});
|
|
|
|
PARENS([AST_Assign, AST_Conditional], function (output) {
|
|
var p = output.parent();
|
|
// !(a = false) → true
|
|
if (p instanceof AST_Unary) return true;
|
|
// 1 + (a = 2) + 3 → 6, side effect setting a = 2
|
|
if (p instanceof AST_Binary && !(p instanceof AST_Assign)) return true;
|
|
// (a = func)() —or— new (a = Object)()
|
|
if (p instanceof AST_Call && p.expression === this) return true;
|
|
// (a = foo) ? bar : baz
|
|
if (p instanceof AST_Conditional && p.condition === this) return true;
|
|
// (a = foo)["prop"] —or— (a = foo).prop
|
|
if (p instanceof AST_PropAccess && p.expression === this) return true;
|
|
// ({a, b} = {a: 1, b: 2}), a destructuring assignment
|
|
if (
|
|
this instanceof AST_Assign &&
|
|
this.left instanceof AST_Destructuring &&
|
|
this.left.is_array === false
|
|
)
|
|
return true;
|
|
});
|
|
|
|
/* -----[ PRINTERS ]----- */
|
|
|
|
DEFPRINT(AST_Directive, function (self, output) {
|
|
output.print_string(self.value, self.quote);
|
|
output.semicolon();
|
|
});
|
|
|
|
DEFPRINT(AST_Expansion, function (self, output) {
|
|
output.print('...');
|
|
self.expression.print(output);
|
|
});
|
|
|
|
DEFPRINT(AST_Destructuring, function (self, output) {
|
|
output.print(self.is_array ? '[' : '{');
|
|
var len = self.names.length;
|
|
self.names.forEach(function (name, i) {
|
|
if (i > 0) output.comma();
|
|
name.print(output);
|
|
// If the final element is a hole, we need to make sure it
|
|
// doesn't look like a trailing comma, by inserting an actual
|
|
// trailing comma.
|
|
if (i == len - 1 && name instanceof AST_Hole) output.comma();
|
|
});
|
|
output.print(self.is_array ? ']' : '}');
|
|
});
|
|
|
|
DEFPRINT(AST_Debugger, function (self, output) {
|
|
output.print('debugger');
|
|
output.semicolon();
|
|
});
|
|
|
|
/* -----[ statements ]----- */
|
|
|
|
function display_body(body, is_toplevel, output, allow_directives) {
|
|
var last = body.length - 1;
|
|
output.in_directive = allow_directives;
|
|
body.forEach(function (stmt, i) {
|
|
if (
|
|
output.in_directive === true &&
|
|
!(
|
|
stmt instanceof AST_Directive ||
|
|
stmt instanceof AST_EmptyStatement ||
|
|
(stmt instanceof AST_SimpleStatement &&
|
|
stmt.body instanceof AST_String)
|
|
)
|
|
) {
|
|
output.in_directive = false;
|
|
}
|
|
if (!(stmt instanceof AST_EmptyStatement)) {
|
|
output.indent();
|
|
stmt.print(output);
|
|
if (!(i == last && is_toplevel)) {
|
|
output.newline();
|
|
if (is_toplevel) output.newline();
|
|
}
|
|
}
|
|
if (
|
|
output.in_directive === true &&
|
|
stmt instanceof AST_SimpleStatement &&
|
|
stmt.body instanceof AST_String
|
|
) {
|
|
output.in_directive = false;
|
|
}
|
|
});
|
|
output.in_directive = false;
|
|
}
|
|
|
|
AST_StatementWithBody.DEFMETHOD('_do_print_body', function (output) {
|
|
print_maybe_braced_body(this.body, output);
|
|
});
|
|
|
|
DEFPRINT(AST_Statement, function (self, output) {
|
|
self.body.print(output);
|
|
output.semicolon();
|
|
});
|
|
DEFPRINT(AST_Toplevel, function (self, output) {
|
|
display_body(self.body, true, output, true);
|
|
output.print('');
|
|
});
|
|
DEFPRINT(AST_LabeledStatement, function (self, output) {
|
|
self.label.print(output);
|
|
output.colon();
|
|
self.body.print(output);
|
|
});
|
|
DEFPRINT(AST_SimpleStatement, function (self, output) {
|
|
self.body.print(output);
|
|
output.semicolon();
|
|
});
|
|
function print_braced_empty(self, output) {
|
|
output.print('{');
|
|
output.with_indent(output.next_indent(), function () {
|
|
output.append_comments(self, true);
|
|
});
|
|
output.add_mapping(self.end);
|
|
output.print('}');
|
|
}
|
|
function print_braced(self, output, allow_directives) {
|
|
if (self.body.length > 0) {
|
|
output.with_block(function () {
|
|
display_body(self.body, false, output, allow_directives);
|
|
output.add_mapping(self.end);
|
|
});
|
|
} else print_braced_empty(self, output);
|
|
}
|
|
DEFPRINT(AST_BlockStatement, function (self, output) {
|
|
print_braced(self, output);
|
|
});
|
|
DEFPRINT(AST_EmptyStatement, function (self, output) {
|
|
output.semicolon();
|
|
});
|
|
DEFPRINT(AST_Do, function (self, output) {
|
|
output.print('do');
|
|
output.space();
|
|
make_block(self.body, output);
|
|
output.space();
|
|
output.print('while');
|
|
output.space();
|
|
output.with_parens(function () {
|
|
self.condition.print(output);
|
|
});
|
|
output.semicolon();
|
|
});
|
|
DEFPRINT(AST_While, function (self, output) {
|
|
output.print('while');
|
|
output.space();
|
|
output.with_parens(function () {
|
|
self.condition.print(output);
|
|
});
|
|
output.space();
|
|
self._do_print_body(output);
|
|
});
|
|
DEFPRINT(AST_For, function (self, output) {
|
|
output.print('for');
|
|
output.space();
|
|
output.with_parens(function () {
|
|
if (self.init) {
|
|
if (self.init instanceof AST_Definitions) {
|
|
self.init.print(output);
|
|
} else {
|
|
parenthesize_for_noin(self.init, output, true);
|
|
}
|
|
output.print(';');
|
|
output.space();
|
|
} else {
|
|
output.print(';');
|
|
}
|
|
if (self.condition) {
|
|
self.condition.print(output);
|
|
output.print(';');
|
|
output.space();
|
|
} else {
|
|
output.print(';');
|
|
}
|
|
if (self.step) {
|
|
self.step.print(output);
|
|
}
|
|
});
|
|
output.space();
|
|
self._do_print_body(output);
|
|
});
|
|
DEFPRINT(AST_ForIn, function (self, output) {
|
|
output.print('for');
|
|
if (self.await) {
|
|
output.space();
|
|
output.print('await');
|
|
}
|
|
output.space();
|
|
output.with_parens(function () {
|
|
self.init.print(output);
|
|
output.space();
|
|
output.print(self instanceof AST_ForOf ? 'of' : 'in');
|
|
output.space();
|
|
self.object.print(output);
|
|
});
|
|
output.space();
|
|
self._do_print_body(output);
|
|
});
|
|
DEFPRINT(AST_With, function (self, output) {
|
|
output.print('with');
|
|
output.space();
|
|
output.with_parens(function () {
|
|
self.expression.print(output);
|
|
});
|
|
output.space();
|
|
self._do_print_body(output);
|
|
});
|
|
|
|
/* -----[ functions ]----- */
|
|
AST_Lambda.DEFMETHOD('_do_print', function (output, nokeyword) {
|
|
var self = this;
|
|
if (!nokeyword) {
|
|
if (self.async) {
|
|
output.print('async');
|
|
output.space();
|
|
}
|
|
output.print('function');
|
|
if (self.is_generator) {
|
|
output.star();
|
|
}
|
|
if (self.name) {
|
|
output.space();
|
|
}
|
|
}
|
|
if (self.name instanceof AST_Symbol) {
|
|
self.name.print(output);
|
|
} else if (nokeyword && self.name instanceof AST_Node) {
|
|
output.with_square(function () {
|
|
self.name.print(output); // Computed method name
|
|
});
|
|
}
|
|
output.with_parens(function () {
|
|
self.argnames.forEach(function (arg, i) {
|
|
if (i) output.comma();
|
|
arg.print(output);
|
|
});
|
|
});
|
|
output.space();
|
|
print_braced(self, output, true);
|
|
});
|
|
DEFPRINT(AST_Lambda, function (self, output) {
|
|
self._do_print(output);
|
|
output.gc_scope(self);
|
|
});
|
|
|
|
DEFPRINT(AST_PrefixedTemplateString, function (self, output) {
|
|
var tag = self.prefix;
|
|
var parenthesize_tag =
|
|
tag instanceof AST_Lambda ||
|
|
tag instanceof AST_Binary ||
|
|
tag instanceof AST_Conditional ||
|
|
tag instanceof AST_Sequence ||
|
|
tag instanceof AST_Unary ||
|
|
(tag instanceof AST_Dot && tag.expression instanceof AST_Object);
|
|
if (parenthesize_tag) output.print('(');
|
|
self.prefix.print(output);
|
|
if (parenthesize_tag) output.print(')');
|
|
self.template_string.print(output);
|
|
});
|
|
DEFPRINT(AST_TemplateString, function (self, output) {
|
|
var is_tagged = output.parent() instanceof AST_PrefixedTemplateString;
|
|
|
|
output.print('`');
|
|
for (var i = 0; i < self.segments.length; i++) {
|
|
if (!(self.segments[i] instanceof AST_TemplateSegment)) {
|
|
output.print('${');
|
|
self.segments[i].print(output);
|
|
output.print('}');
|
|
} else if (is_tagged) {
|
|
output.print(self.segments[i].raw);
|
|
} else {
|
|
output.print_template_string_chars(self.segments[i].value);
|
|
}
|
|
}
|
|
output.print('`');
|
|
});
|
|
DEFPRINT(AST_TemplateSegment, function (self, output) {
|
|
output.print_template_string_chars(self.value);
|
|
});
|
|
|
|
AST_Arrow.DEFMETHOD('_do_print', function (output) {
|
|
var self = this;
|
|
var parent = output.parent();
|
|
var needs_parens =
|
|
(parent instanceof AST_Binary &&
|
|
!(parent instanceof AST_Assign) &&
|
|
!(parent instanceof AST_DefaultAssign)) ||
|
|
parent instanceof AST_Unary ||
|
|
(parent instanceof AST_Call && self === parent.expression);
|
|
if (needs_parens) {
|
|
output.print('(');
|
|
}
|
|
if (self.async) {
|
|
output.print('async');
|
|
output.space();
|
|
}
|
|
if (self.argnames.length === 1 && self.argnames[0] instanceof AST_Symbol) {
|
|
self.argnames[0].print(output);
|
|
} else {
|
|
output.with_parens(function () {
|
|
self.argnames.forEach(function (arg, i) {
|
|
if (i) output.comma();
|
|
arg.print(output);
|
|
});
|
|
});
|
|
}
|
|
output.space();
|
|
output.print('=>');
|
|
output.space();
|
|
const first_statement = self.body[0];
|
|
if (self.body.length === 1 && first_statement instanceof AST_Return) {
|
|
const returned = first_statement.value;
|
|
if (!returned) {
|
|
output.print('{}');
|
|
} else if (left_is_object(returned)) {
|
|
output.print('(');
|
|
returned.print(output);
|
|
output.print(')');
|
|
} else {
|
|
returned.print(output);
|
|
}
|
|
} else {
|
|
print_braced(self, output);
|
|
}
|
|
if (needs_parens) {
|
|
output.print(')');
|
|
}
|
|
output.gc_scope(self);
|
|
});
|
|
|
|
/* -----[ exits ]----- */
|
|
AST_Exit.DEFMETHOD('_do_print', function (output, kind) {
|
|
output.print(kind);
|
|
if (this.value) {
|
|
output.space();
|
|
const comments = this.value.start.comments_before;
|
|
if (
|
|
comments &&
|
|
comments.length &&
|
|
!output.printed_comments.has(comments)
|
|
) {
|
|
output.print('(');
|
|
this.value.print(output);
|
|
output.print(')');
|
|
} else {
|
|
this.value.print(output);
|
|
}
|
|
}
|
|
output.semicolon();
|
|
});
|
|
DEFPRINT(AST_Return, function (self, output) {
|
|
self._do_print(output, 'return');
|
|
});
|
|
DEFPRINT(AST_Throw, function (self, output) {
|
|
self._do_print(output, 'throw');
|
|
});
|
|
|
|
/* -----[ yield ]----- */
|
|
|
|
DEFPRINT(AST_Yield, function (self, output) {
|
|
var star = self.is_star ? '*' : '';
|
|
output.print('yield' + star);
|
|
if (self.expression) {
|
|
output.space();
|
|
self.expression.print(output);
|
|
}
|
|
});
|
|
|
|
DEFPRINT(AST_Await, function (self, output) {
|
|
output.print('await');
|
|
output.space();
|
|
var e = self.expression;
|
|
var parens = !(
|
|
e instanceof AST_Call ||
|
|
e instanceof AST_SymbolRef ||
|
|
e instanceof AST_PropAccess ||
|
|
e instanceof AST_Unary ||
|
|
e instanceof AST_Constant ||
|
|
e instanceof AST_Await ||
|
|
e instanceof AST_Object
|
|
);
|
|
if (parens) output.print('(');
|
|
self.expression.print(output);
|
|
if (parens) output.print(')');
|
|
});
|
|
|
|
/* -----[ loop control ]----- */
|
|
AST_LoopControl.DEFMETHOD('_do_print', function (output, kind) {
|
|
output.print(kind);
|
|
if (this.label) {
|
|
output.space();
|
|
this.label.print(output);
|
|
}
|
|
output.semicolon();
|
|
});
|
|
DEFPRINT(AST_Break, function (self, output) {
|
|
self._do_print(output, 'break');
|
|
});
|
|
DEFPRINT(AST_Continue, function (self, output) {
|
|
self._do_print(output, 'continue');
|
|
});
|
|
|
|
/* -----[ if ]----- */
|
|
function make_then(self, output) {
|
|
var b = self.body;
|
|
if (
|
|
output.option('braces') ||
|
|
(output.option('ie8') && b instanceof AST_Do)
|
|
)
|
|
return make_block(b, output);
|
|
// The squeezer replaces "block"-s that contain only a single
|
|
// statement with the statement itself; technically, the AST
|
|
// is correct, but this can create problems when we output an
|
|
// IF having an ELSE clause where the THEN clause ends in an
|
|
// IF *without* an ELSE block (then the outer ELSE would refer
|
|
// to the inner IF). This function checks for this case and
|
|
// adds the block braces if needed.
|
|
if (!b) return output.force_semicolon();
|
|
while (true) {
|
|
if (b instanceof AST_If) {
|
|
if (!b.alternative) {
|
|
make_block(self.body, output);
|
|
return;
|
|
}
|
|
b = b.alternative;
|
|
} else if (b instanceof AST_StatementWithBody) {
|
|
b = b.body;
|
|
} else break;
|
|
}
|
|
print_maybe_braced_body(self.body, output);
|
|
}
|
|
DEFPRINT(AST_If, function (self, output) {
|
|
output.print('if');
|
|
output.space();
|
|
output.with_parens(function () {
|
|
self.condition.print(output);
|
|
});
|
|
output.space();
|
|
if (self.alternative) {
|
|
make_then(self, output);
|
|
output.space();
|
|
output.print('else');
|
|
output.space();
|
|
if (self.alternative instanceof AST_If) self.alternative.print(output);
|
|
else print_maybe_braced_body(self.alternative, output);
|
|
} else {
|
|
self._do_print_body(output);
|
|
}
|
|
});
|
|
|
|
/* -----[ switch ]----- */
|
|
DEFPRINT(AST_Switch, function (self, output) {
|
|
output.print('switch');
|
|
output.space();
|
|
output.with_parens(function () {
|
|
self.expression.print(output);
|
|
});
|
|
output.space();
|
|
var last = self.body.length - 1;
|
|
if (last < 0) print_braced_empty(self, output);
|
|
else
|
|
output.with_block(function () {
|
|
self.body.forEach(function (branch, i) {
|
|
output.indent(true);
|
|
branch.print(output);
|
|
if (i < last && branch.body.length > 0) output.newline();
|
|
});
|
|
});
|
|
});
|
|
AST_SwitchBranch.DEFMETHOD('_do_print_body', function (output) {
|
|
output.newline();
|
|
this.body.forEach(function (stmt) {
|
|
output.indent();
|
|
stmt.print(output);
|
|
output.newline();
|
|
});
|
|
});
|
|
DEFPRINT(AST_Default, function (self, output) {
|
|
output.print('default:');
|
|
self._do_print_body(output);
|
|
});
|
|
DEFPRINT(AST_Case, function (self, output) {
|
|
output.print('case');
|
|
output.space();
|
|
self.expression.print(output);
|
|
output.print(':');
|
|
self._do_print_body(output);
|
|
});
|
|
|
|
/* -----[ exceptions ]----- */
|
|
DEFPRINT(AST_Try, function (self, output) {
|
|
output.print('try');
|
|
output.space();
|
|
self.body.print(output);
|
|
if (self.bcatch) {
|
|
output.space();
|
|
self.bcatch.print(output);
|
|
}
|
|
if (self.bfinally) {
|
|
output.space();
|
|
self.bfinally.print(output);
|
|
}
|
|
});
|
|
DEFPRINT(AST_TryBlock, function (self, output) {
|
|
print_braced(self, output);
|
|
});
|
|
DEFPRINT(AST_Catch, function (self, output) {
|
|
output.print('catch');
|
|
if (self.argname) {
|
|
output.space();
|
|
output.with_parens(function () {
|
|
self.argname.print(output);
|
|
});
|
|
}
|
|
output.space();
|
|
print_braced(self, output);
|
|
});
|
|
DEFPRINT(AST_Finally, function (self, output) {
|
|
output.print('finally');
|
|
output.space();
|
|
print_braced(self, output);
|
|
});
|
|
|
|
/* -----[ var/const ]----- */
|
|
AST_Definitions.DEFMETHOD('_do_print', function (output, kind) {
|
|
output.print(kind);
|
|
output.space();
|
|
this.definitions.forEach(function (def, i) {
|
|
if (i) output.comma();
|
|
def.print(output);
|
|
});
|
|
var p = output.parent();
|
|
var in_for = p instanceof AST_For || p instanceof AST_ForIn;
|
|
var output_semicolon = !in_for || (p && p.init !== this);
|
|
if (output_semicolon) output.semicolon();
|
|
});
|
|
DEFPRINT(AST_Let, function (self, output) {
|
|
self._do_print(output, 'let');
|
|
});
|
|
DEFPRINT(AST_Var, function (self, output) {
|
|
self._do_print(output, 'var');
|
|
});
|
|
DEFPRINT(AST_Const, function (self, output) {
|
|
self._do_print(output, 'const');
|
|
});
|
|
DEFPRINT(AST_Import, function (self, output) {
|
|
output.print('import');
|
|
output.space();
|
|
if (self.imported_name) {
|
|
self.imported_name.print(output);
|
|
}
|
|
if (self.imported_name && self.imported_names) {
|
|
output.print(',');
|
|
output.space();
|
|
}
|
|
if (self.imported_names) {
|
|
if (
|
|
self.imported_names.length === 1 &&
|
|
self.imported_names[0].foreign_name.name === '*' &&
|
|
!self.imported_names[0].foreign_name.quote
|
|
) {
|
|
self.imported_names[0].print(output);
|
|
} else {
|
|
output.print('{');
|
|
self.imported_names.forEach(function (name_import, i) {
|
|
output.space();
|
|
name_import.print(output);
|
|
if (i < self.imported_names.length - 1) {
|
|
output.print(',');
|
|
}
|
|
});
|
|
output.space();
|
|
output.print('}');
|
|
}
|
|
}
|
|
if (self.imported_name || self.imported_names) {
|
|
output.space();
|
|
output.print('from');
|
|
output.space();
|
|
}
|
|
self.module_name.print(output);
|
|
if (self.attributes) {
|
|
output.print('with');
|
|
self.attributes.print(output);
|
|
}
|
|
output.semicolon();
|
|
});
|
|
DEFPRINT(AST_ImportMeta, function (self, output) {
|
|
output.print('import.meta');
|
|
});
|
|
|
|
DEFPRINT(AST_NameMapping, function (self, output) {
|
|
var is_import = output.parent() instanceof AST_Import;
|
|
var definition = self.name.definition();
|
|
var foreign_name = self.foreign_name;
|
|
var names_are_different =
|
|
((definition && definition.mangled_name) || self.name.name) !==
|
|
foreign_name.name;
|
|
if (
|
|
!names_are_different &&
|
|
foreign_name.name === '*' &&
|
|
foreign_name.quote != self.name.quote
|
|
) {
|
|
// export * as "*"
|
|
names_are_different = true;
|
|
}
|
|
var foreign_name_is_name = foreign_name.quote == null;
|
|
if (names_are_different) {
|
|
if (is_import) {
|
|
if (foreign_name_is_name) {
|
|
output.print(foreign_name.name);
|
|
} else {
|
|
output.print_string(foreign_name.name, foreign_name.quote);
|
|
}
|
|
} else {
|
|
if (self.name.quote == null) {
|
|
self.name.print(output);
|
|
} else {
|
|
output.print_string(self.name.name, self.name.quote);
|
|
}
|
|
}
|
|
output.space();
|
|
output.print('as');
|
|
output.space();
|
|
if (is_import) {
|
|
self.name.print(output);
|
|
} else {
|
|
if (foreign_name_is_name) {
|
|
output.print(foreign_name.name);
|
|
} else {
|
|
output.print_string(foreign_name.name, foreign_name.quote);
|
|
}
|
|
}
|
|
} else {
|
|
if (self.name.quote == null) {
|
|
self.name.print(output);
|
|
} else {
|
|
output.print_string(self.name.name, self.name.quote);
|
|
}
|
|
}
|
|
});
|
|
|
|
DEFPRINT(AST_Export, function (self, output) {
|
|
output.print('export');
|
|
output.space();
|
|
if (self.is_default) {
|
|
output.print('default');
|
|
output.space();
|
|
}
|
|
if (self.exported_names) {
|
|
if (
|
|
self.exported_names.length === 1 &&
|
|
self.exported_names[0].name.name === '*' &&
|
|
!self.exported_names[0].name.quote
|
|
) {
|
|
self.exported_names[0].print(output);
|
|
} else {
|
|
output.print('{');
|
|
self.exported_names.forEach(function (name_export, i) {
|
|
output.space();
|
|
name_export.print(output);
|
|
if (i < self.exported_names.length - 1) {
|
|
output.print(',');
|
|
}
|
|
});
|
|
output.space();
|
|
output.print('}');
|
|
}
|
|
} else if (self.exported_value) {
|
|
self.exported_value.print(output);
|
|
} else if (self.exported_definition) {
|
|
self.exported_definition.print(output);
|
|
if (self.exported_definition instanceof AST_Definitions) return;
|
|
}
|
|
if (self.module_name) {
|
|
output.space();
|
|
output.print('from');
|
|
output.space();
|
|
self.module_name.print(output);
|
|
}
|
|
if (self.attributes) {
|
|
output.print('with');
|
|
self.attributes.print(output);
|
|
}
|
|
if (
|
|
(self.exported_value &&
|
|
!(
|
|
self.exported_value instanceof AST_Defun ||
|
|
self.exported_value instanceof AST_Function ||
|
|
self.exported_value instanceof AST_Class
|
|
)) ||
|
|
self.module_name ||
|
|
self.exported_names
|
|
) {
|
|
output.semicolon();
|
|
}
|
|
});
|
|
|
|
function parenthesize_for_noin(node, output, noin) {
|
|
var parens = false;
|
|
// need to take some precautions here:
|
|
// https://github.com/mishoo/UglifyJS2/issues/60
|
|
if (noin) {
|
|
parens = walk(node, (node) => {
|
|
// Don't go into scopes -- except arrow functions:
|
|
// https://github.com/terser/terser/issues/1019#issuecomment-877642607
|
|
if (node instanceof AST_Scope && !(node instanceof AST_Arrow)) {
|
|
return true;
|
|
}
|
|
if (
|
|
(node instanceof AST_Binary && node.operator == 'in') ||
|
|
node instanceof AST_PrivateIn
|
|
) {
|
|
return walk_abort; // makes walk() return true
|
|
}
|
|
});
|
|
}
|
|
node.print(output, parens);
|
|
}
|
|
|
|
DEFPRINT(AST_VarDef, function (self, output) {
|
|
self.name.print(output);
|
|
if (self.value) {
|
|
output.space();
|
|
output.print('=');
|
|
output.space();
|
|
var p = output.parent(1);
|
|
var noin = p instanceof AST_For || p instanceof AST_ForIn;
|
|
parenthesize_for_noin(self.value, output, noin);
|
|
}
|
|
});
|
|
|
|
/* -----[ other expressions ]----- */
|
|
DEFPRINT(AST_Call, function (self, output) {
|
|
self.expression.print(output);
|
|
if (self instanceof AST_New && self.args.length === 0) return;
|
|
if (
|
|
self.expression instanceof AST_Call ||
|
|
self.expression instanceof AST_Lambda
|
|
) {
|
|
output.add_mapping(self.start);
|
|
}
|
|
if (self.optional) output.print('?.');
|
|
output.with_parens(function () {
|
|
self.args.forEach(function (expr, i) {
|
|
if (i) output.comma();
|
|
expr.print(output);
|
|
});
|
|
});
|
|
});
|
|
DEFPRINT(AST_New, function (self, output) {
|
|
output.print('new');
|
|
output.space();
|
|
AST_Call.prototype._codegen(self, output);
|
|
});
|
|
|
|
AST_Sequence.DEFMETHOD('_do_print', function (output) {
|
|
this.expressions.forEach(function (node, index) {
|
|
if (index > 0) {
|
|
output.comma();
|
|
if (output.should_break()) {
|
|
output.newline();
|
|
output.indent();
|
|
}
|
|
}
|
|
node.print(output);
|
|
});
|
|
});
|
|
DEFPRINT(AST_Sequence, function (self, output) {
|
|
self._do_print(output);
|
|
// var p = output.parent();
|
|
// if (p instanceof AST_Statement) {
|
|
// output.with_indent(output.next_indent(), function(){
|
|
// self._do_print(output);
|
|
// });
|
|
// } else {
|
|
// self._do_print(output);
|
|
// }
|
|
});
|
|
DEFPRINT(AST_Dot, function (self, output) {
|
|
var expr = self.expression;
|
|
expr.print(output);
|
|
var prop = self.property;
|
|
var print_computed =
|
|
ALL_RESERVED_WORDS.has(prop) ?
|
|
output.option('ie8')
|
|
: !is_identifier_string(
|
|
prop,
|
|
output.option('ecma') >= 2015 && !output.option('safari10')
|
|
);
|
|
|
|
if (self.optional) output.print('?.');
|
|
|
|
if (print_computed) {
|
|
output.print('[');
|
|
output.add_mapping(self.end);
|
|
output.print_string(prop);
|
|
output.print(']');
|
|
} else {
|
|
if (expr instanceof AST_Number && expr.getValue() >= 0) {
|
|
if (!/[xa-f.)]/i.test(output.last())) {
|
|
output.print('.');
|
|
}
|
|
}
|
|
if (!self.optional) output.print('.');
|
|
// the name after dot would be mapped about here.
|
|
output.add_mapping(self.end);
|
|
output.print_name(prop);
|
|
}
|
|
});
|
|
DEFPRINT(AST_DotHash, function (self, output) {
|
|
var expr = self.expression;
|
|
expr.print(output);
|
|
var prop = self.property;
|
|
|
|
if (self.optional) output.print('?');
|
|
output.print('.#');
|
|
output.add_mapping(self.end);
|
|
output.print_name(prop);
|
|
});
|
|
DEFPRINT(AST_Sub, function (self, output) {
|
|
self.expression.print(output);
|
|
if (self.optional) output.print('?.');
|
|
output.print('[');
|
|
self.property.print(output);
|
|
output.print(']');
|
|
});
|
|
DEFPRINT(AST_Chain, function (self, output) {
|
|
self.expression.print(output);
|
|
});
|
|
DEFPRINT(AST_UnaryPrefix, function (self, output) {
|
|
var op = self.operator;
|
|
if (op === '--' && output.last().endsWith('!')) {
|
|
// avoid printing "<!--"
|
|
output.print(' ');
|
|
}
|
|
output.print(op);
|
|
if (
|
|
/^[a-z]/i.test(op) ||
|
|
(/[+-]$/.test(op) &&
|
|
self.expression instanceof AST_UnaryPrefix &&
|
|
/^[+-]/.test(self.expression.operator))
|
|
) {
|
|
output.space();
|
|
}
|
|
self.expression.print(output);
|
|
});
|
|
DEFPRINT(AST_UnaryPostfix, function (self, output) {
|
|
self.expression.print(output);
|
|
output.print(self.operator);
|
|
});
|
|
DEFPRINT(AST_Binary, function (self, output) {
|
|
var op = self.operator;
|
|
self.left.print(output);
|
|
if (
|
|
op[0] == '>' /* ">>" ">>>" ">" ">=" */ &&
|
|
output.last().endsWith('--')
|
|
) {
|
|
// space is mandatory to avoid outputting -->
|
|
output.print(' ');
|
|
} else {
|
|
// the space is optional depending on "beautify"
|
|
output.space();
|
|
}
|
|
output.print(op);
|
|
output.space();
|
|
self.right.print(output);
|
|
});
|
|
DEFPRINT(AST_Conditional, function (self, output) {
|
|
self.condition.print(output);
|
|
output.space();
|
|
output.print('?');
|
|
output.space();
|
|
self.consequent.print(output);
|
|
output.space();
|
|
output.colon();
|
|
self.alternative.print(output);
|
|
});
|
|
|
|
/* -----[ literals ]----- */
|
|
DEFPRINT(AST_Array, function (self, output) {
|
|
output.with_square(function () {
|
|
var a = self.elements,
|
|
len = a.length;
|
|
if (len > 0) output.space();
|
|
a.forEach(function (exp, i) {
|
|
if (i) output.comma();
|
|
exp.print(output);
|
|
// If the final element is a hole, we need to make sure it
|
|
// doesn't look like a trailing comma, by inserting an actual
|
|
// trailing comma.
|
|
if (i === len - 1 && exp instanceof AST_Hole) output.comma();
|
|
});
|
|
if (len > 0) output.space();
|
|
});
|
|
});
|
|
DEFPRINT(AST_Object, function (self, output) {
|
|
if (self.properties.length > 0)
|
|
output.with_block(function () {
|
|
self.properties.forEach(function (prop, i) {
|
|
if (i) {
|
|
output.print(',');
|
|
output.newline();
|
|
}
|
|
output.indent();
|
|
prop.print(output);
|
|
});
|
|
output.newline();
|
|
});
|
|
else print_braced_empty(self, output);
|
|
});
|
|
DEFPRINT(AST_Class, function (self, output) {
|
|
output.print('class');
|
|
output.space();
|
|
if (self.name) {
|
|
self.name.print(output);
|
|
output.space();
|
|
}
|
|
if (self.extends) {
|
|
var parens =
|
|
!(self.extends instanceof AST_SymbolRef) &&
|
|
!(self.extends instanceof AST_PropAccess) &&
|
|
!(self.extends instanceof AST_ClassExpression) &&
|
|
!(self.extends instanceof AST_Function);
|
|
output.print('extends');
|
|
if (parens) {
|
|
output.print('(');
|
|
} else {
|
|
output.space();
|
|
}
|
|
self.extends.print(output);
|
|
if (parens) {
|
|
output.print(')');
|
|
} else {
|
|
output.space();
|
|
}
|
|
}
|
|
if (self.properties.length > 0)
|
|
output.with_block(function () {
|
|
self.properties.forEach(function (prop, i) {
|
|
if (i) {
|
|
output.newline();
|
|
}
|
|
output.indent();
|
|
prop.print(output);
|
|
});
|
|
output.newline();
|
|
});
|
|
else output.print('{}');
|
|
});
|
|
DEFPRINT(AST_NewTarget, function (self, output) {
|
|
output.print('new.target');
|
|
});
|
|
|
|
/** Prints a prop name. Returns whether it can be used as a shorthand. */
|
|
function print_property_name(key, quote, output) {
|
|
if (output.option('quote_keys')) {
|
|
output.print_string(key);
|
|
return false;
|
|
}
|
|
if ('' + +key == key && key >= 0) {
|
|
if (output.option('keep_numbers')) {
|
|
output.print(key);
|
|
return false;
|
|
}
|
|
output.print(make_num(key));
|
|
return false;
|
|
}
|
|
var print_string =
|
|
ALL_RESERVED_WORDS.has(key) ? output.option('ie8')
|
|
: output.option('ecma') < 2015 || output.option('safari10') ?
|
|
!is_basic_identifier_string(key)
|
|
: !is_identifier_string(key, true);
|
|
if (print_string || (quote && output.option('keep_quoted_props'))) {
|
|
output.print_string(key, quote);
|
|
return false;
|
|
}
|
|
output.print_name(key);
|
|
return true;
|
|
}
|
|
|
|
DEFPRINT(AST_ObjectKeyVal, function (self, output) {
|
|
function get_name(self) {
|
|
var def = self.definition();
|
|
return def ? def.mangled_name || def.name : self.name;
|
|
}
|
|
|
|
const try_shorthand =
|
|
output.option('shorthand') && !(self.key instanceof AST_Node);
|
|
if (
|
|
try_shorthand &&
|
|
self.value instanceof AST_Symbol &&
|
|
get_name(self.value) === self.key &&
|
|
!ALL_RESERVED_WORDS.has(self.key)
|
|
) {
|
|
const was_shorthand = print_property_name(self.key, self.quote, output);
|
|
if (!was_shorthand) {
|
|
output.colon();
|
|
self.value.print(output);
|
|
}
|
|
} else if (
|
|
try_shorthand &&
|
|
self.value instanceof AST_DefaultAssign &&
|
|
self.value.left instanceof AST_Symbol &&
|
|
get_name(self.value.left) === self.key
|
|
) {
|
|
const was_shorthand = print_property_name(self.key, self.quote, output);
|
|
if (!was_shorthand) {
|
|
output.colon();
|
|
self.value.left.print(output);
|
|
}
|
|
output.space();
|
|
output.print('=');
|
|
output.space();
|
|
self.value.right.print(output);
|
|
} else {
|
|
if (!(self.key instanceof AST_Node)) {
|
|
print_property_name(self.key, self.quote, output);
|
|
} else {
|
|
output.with_square(function () {
|
|
self.key.print(output);
|
|
});
|
|
}
|
|
output.colon();
|
|
self.value.print(output);
|
|
}
|
|
});
|
|
DEFPRINT(AST_ClassPrivateProperty, (self, output) => {
|
|
if (self.static) {
|
|
output.print('static');
|
|
output.space();
|
|
}
|
|
|
|
output.print('#');
|
|
|
|
print_property_name(self.key.name, self.quote, output);
|
|
|
|
if (self.value) {
|
|
output.print('=');
|
|
self.value.print(output);
|
|
}
|
|
|
|
output.semicolon();
|
|
});
|
|
DEFPRINT(AST_ClassProperty, (self, output) => {
|
|
if (self.static) {
|
|
output.print('static');
|
|
output.space();
|
|
}
|
|
|
|
if (self.key instanceof AST_SymbolClassProperty) {
|
|
print_property_name(self.key.name, self.quote, output);
|
|
} else {
|
|
output.print('[');
|
|
self.key.print(output);
|
|
output.print(']');
|
|
}
|
|
|
|
if (self.value) {
|
|
output.print('=');
|
|
self.value.print(output);
|
|
}
|
|
|
|
output.semicolon();
|
|
});
|
|
AST_ObjectProperty.DEFMETHOD(
|
|
'_print_getter_setter',
|
|
function (type, is_private, output) {
|
|
var self = this;
|
|
if (self.static) {
|
|
output.print('static');
|
|
output.space();
|
|
}
|
|
if (type) {
|
|
output.print(type);
|
|
output.space();
|
|
}
|
|
if (self.key instanceof AST_SymbolMethod) {
|
|
if (is_private) output.print('#');
|
|
print_property_name(self.key.name, self.quote, output);
|
|
self.key.add_source_map(output);
|
|
} else {
|
|
output.with_square(function () {
|
|
self.key.print(output);
|
|
});
|
|
}
|
|
self.value._do_print(output, true);
|
|
}
|
|
);
|
|
DEFPRINT(AST_ObjectSetter, function (self, output) {
|
|
self._print_getter_setter('set', false, output);
|
|
});
|
|
DEFPRINT(AST_ObjectGetter, function (self, output) {
|
|
self._print_getter_setter('get', false, output);
|
|
});
|
|
DEFPRINT(AST_PrivateSetter, function (self, output) {
|
|
self._print_getter_setter('set', true, output);
|
|
});
|
|
DEFPRINT(AST_PrivateGetter, function (self, output) {
|
|
self._print_getter_setter('get', true, output);
|
|
});
|
|
DEFPRINT(AST_ConciseMethod, function (self, output) {
|
|
var type;
|
|
if (self.is_generator && self.async) {
|
|
type = 'async*';
|
|
} else if (self.is_generator) {
|
|
type = '*';
|
|
} else if (self.async) {
|
|
type = 'async';
|
|
}
|
|
self._print_getter_setter(type, false, output);
|
|
});
|
|
DEFPRINT(AST_PrivateMethod, function (self, output) {
|
|
var type;
|
|
if (self.is_generator && self.async) {
|
|
type = 'async*';
|
|
} else if (self.is_generator) {
|
|
type = '*';
|
|
} else if (self.async) {
|
|
type = 'async';
|
|
}
|
|
self._print_getter_setter(type, true, output);
|
|
});
|
|
DEFPRINT(AST_PrivateIn, function (self, output) {
|
|
self.key.print(output);
|
|
output.space();
|
|
output.print('in');
|
|
output.space();
|
|
self.value.print(output);
|
|
});
|
|
DEFPRINT(AST_SymbolPrivateProperty, function (self, output) {
|
|
output.print('#' + self.name);
|
|
});
|
|
DEFPRINT(AST_ClassStaticBlock, function (self, output) {
|
|
output.print('static');
|
|
output.space();
|
|
print_braced(self, output);
|
|
});
|
|
AST_Symbol.DEFMETHOD('_do_print', function (output) {
|
|
var def = this.definition();
|
|
output.print_name(def ? def.mangled_name || def.name : this.name);
|
|
});
|
|
DEFPRINT(AST_Symbol, function (self, output) {
|
|
self._do_print(output);
|
|
});
|
|
DEFPRINT(AST_Hole, noop);
|
|
DEFPRINT(AST_This, function (self, output) {
|
|
output.print('this');
|
|
});
|
|
DEFPRINT(AST_Super, function (self, output) {
|
|
output.print('super');
|
|
});
|
|
DEFPRINT(AST_Constant, function (self, output) {
|
|
output.print(self.getValue());
|
|
});
|
|
DEFPRINT(AST_String, function (self, output) {
|
|
output.print_string(self.getValue(), self.quote, output.in_directive);
|
|
});
|
|
DEFPRINT(AST_Number, function (self, output) {
|
|
if ((output.option('keep_numbers') || output.use_asm) && self.raw) {
|
|
output.print(self.raw);
|
|
} else {
|
|
output.print(make_num(self.getValue()));
|
|
}
|
|
});
|
|
DEFPRINT(AST_BigInt, function (self, output) {
|
|
output.print(self.getValue() + 'n');
|
|
});
|
|
|
|
const r_slash_script = /(<\s*\/\s*script)/i;
|
|
const r_starts_with_script = /^\s*script/i;
|
|
const slash_script_replace = (_, $1) => $1.replace('/', '\\/');
|
|
DEFPRINT(AST_RegExp, function (self, output) {
|
|
let { source, flags } = self.getValue();
|
|
source = regexp_source_fix(source);
|
|
flags = flags ? sort_regexp_flags(flags) : '';
|
|
|
|
// Avoid outputting end of script tag
|
|
source = source.replace(r_slash_script, slash_script_replace);
|
|
if (r_starts_with_script.test(source) && output.last().endsWith('<')) {
|
|
output.print(' ');
|
|
}
|
|
|
|
output.print(output.to_utf8(`/${source}/${flags}`, false, true));
|
|
|
|
const parent = output.parent();
|
|
if (
|
|
parent instanceof AST_Binary &&
|
|
/^\w/.test(parent.operator) &&
|
|
parent.left === self
|
|
) {
|
|
output.print(' ');
|
|
}
|
|
});
|
|
|
|
/** if, for, while, may or may not have braces surrounding its body */
|
|
function print_maybe_braced_body(stat, output) {
|
|
if (output.option('braces')) {
|
|
make_block(stat, output);
|
|
} else {
|
|
if (!stat || stat instanceof AST_EmptyStatement) output.force_semicolon();
|
|
else if (
|
|
stat instanceof AST_Let ||
|
|
stat instanceof AST_Const ||
|
|
stat instanceof AST_Class
|
|
)
|
|
make_block(stat, output);
|
|
else stat.print(output);
|
|
}
|
|
}
|
|
|
|
function best_of(a) {
|
|
var best = a[0],
|
|
len = best.length;
|
|
for (var i = 1; i < a.length; ++i) {
|
|
if (a[i].length < len) {
|
|
best = a[i];
|
|
len = best.length;
|
|
}
|
|
}
|
|
return best;
|
|
}
|
|
|
|
function make_num(num) {
|
|
var str = num.toString(10).replace(/^0\./, '.').replace('e+', 'e');
|
|
var candidates = [str];
|
|
if (Math.floor(num) === num) {
|
|
if (num < 0) {
|
|
candidates.push('-0x' + (-num).toString(16).toLowerCase());
|
|
} else {
|
|
candidates.push('0x' + num.toString(16).toLowerCase());
|
|
}
|
|
}
|
|
var match, len, digits;
|
|
if ((match = /^\.0+/.exec(str))) {
|
|
len = match[0].length;
|
|
digits = str.slice(len);
|
|
candidates.push(digits + 'e-' + (digits.length + len - 1));
|
|
} else if ((match = /0+$/.exec(str))) {
|
|
len = match[0].length;
|
|
candidates.push(str.slice(0, -len) + 'e' + len);
|
|
} else if ((match = /^(\d)\.(\d+)e(-?\d+)$/.exec(str))) {
|
|
candidates.push(match[1] + match[2] + 'e' + (match[3] - match[2].length));
|
|
}
|
|
return best_of(candidates);
|
|
}
|
|
|
|
function make_block(stmt, output) {
|
|
if (!stmt || stmt instanceof AST_EmptyStatement) output.print('{}');
|
|
else if (stmt instanceof AST_BlockStatement) stmt.print(output);
|
|
else
|
|
output.with_block(function () {
|
|
output.indent();
|
|
stmt.print(output);
|
|
output.newline();
|
|
});
|
|
}
|
|
|
|
/* -----[ source map generators ]----- */
|
|
|
|
function DEFMAP(nodetype, generator) {
|
|
nodetype.forEach(function (nodetype) {
|
|
nodetype.DEFMETHOD('add_source_map', generator);
|
|
});
|
|
}
|
|
|
|
DEFMAP(
|
|
[
|
|
// We could easily add info for ALL nodes, but it seems to me that
|
|
// would be quite wasteful, hence this noop in the base class.
|
|
AST_Node,
|
|
// since the label symbol will mark it
|
|
AST_LabeledStatement,
|
|
AST_Toplevel,
|
|
],
|
|
noop
|
|
);
|
|
|
|
// XXX: I'm not exactly sure if we need it for all of these nodes,
|
|
// or if we should add even more.
|
|
DEFMAP(
|
|
[
|
|
AST_Array,
|
|
AST_BlockStatement,
|
|
AST_Catch,
|
|
AST_Class,
|
|
AST_Constant,
|
|
AST_Debugger,
|
|
AST_Definitions,
|
|
AST_Directive,
|
|
AST_Finally,
|
|
AST_Jump,
|
|
AST_Lambda,
|
|
AST_New,
|
|
AST_Object,
|
|
AST_StatementWithBody,
|
|
AST_Symbol,
|
|
AST_Switch,
|
|
AST_SwitchBranch,
|
|
AST_TemplateString,
|
|
AST_TemplateSegment,
|
|
AST_Try,
|
|
],
|
|
function (output) {
|
|
output.add_mapping(this.start);
|
|
}
|
|
);
|
|
|
|
DEFMAP(
|
|
[
|
|
AST_ObjectGetter,
|
|
AST_ObjectSetter,
|
|
AST_PrivateGetter,
|
|
AST_PrivateSetter,
|
|
AST_ConciseMethod,
|
|
AST_PrivateMethod,
|
|
],
|
|
function (output) {
|
|
output.add_mapping(this.start, false /*name handled below*/);
|
|
}
|
|
);
|
|
|
|
DEFMAP([AST_SymbolMethod, AST_SymbolPrivateProperty], function (output) {
|
|
const tok_type = this.end && this.end.type;
|
|
if (tok_type === 'name' || tok_type === 'privatename') {
|
|
output.add_mapping(this.end, this.name);
|
|
} else {
|
|
output.add_mapping(this.end);
|
|
}
|
|
});
|
|
|
|
DEFMAP([AST_ObjectProperty], function (output) {
|
|
output.add_mapping(this.start, this.key);
|
|
});
|
|
})();
|
|
|
|
export { OutputStream };
|