121 lines
3.4 KiB
JavaScript
121 lines
3.4 KiB
JavaScript
/**
|
|
* @fileoverview enforce the location of arrow function bodies
|
|
* @author Sharmila Jesupaul
|
|
* @deprecated in ESLint v8.53.0
|
|
*/
|
|
'use strict';
|
|
|
|
const { isCommentToken, isNotOpeningParenToken } = require('./utils/ast-utils');
|
|
|
|
//------------------------------------------------------------------------------
|
|
// Rule Definition
|
|
//------------------------------------------------------------------------------
|
|
/** @type {import('../types').Rule.RuleModule} */
|
|
module.exports = {
|
|
meta: {
|
|
deprecated: {
|
|
message: 'Formatting rules are being moved out of ESLint core.',
|
|
url: 'https://eslint.org/blog/2023/10/deprecating-formatting-rules/',
|
|
deprecatedSince: '8.53.0',
|
|
availableUntil: '10.0.0',
|
|
replacedBy: [
|
|
{
|
|
message:
|
|
'ESLint Stylistic now maintains deprecated stylistic core rules.',
|
|
url: 'https://eslint.style/guide/migration',
|
|
plugin: {
|
|
name: '@stylistic/eslint-plugin-js',
|
|
url: 'https://eslint.style/packages/js',
|
|
},
|
|
rule: {
|
|
name: 'implicit-arrow-linebreak',
|
|
url: 'https://eslint.style/rules/js/implicit-arrow-linebreak',
|
|
},
|
|
},
|
|
],
|
|
},
|
|
type: 'layout',
|
|
|
|
docs: {
|
|
description: 'Enforce the location of arrow function bodies',
|
|
recommended: false,
|
|
url: 'https://eslint.org/docs/latest/rules/implicit-arrow-linebreak',
|
|
},
|
|
|
|
fixable: 'whitespace',
|
|
|
|
schema: [
|
|
{
|
|
enum: ['beside', 'below'],
|
|
},
|
|
],
|
|
messages: {
|
|
expected: 'Expected a linebreak before this expression.',
|
|
unexpected: 'Expected no linebreak before this expression.',
|
|
},
|
|
},
|
|
|
|
create(context) {
|
|
const sourceCode = context.sourceCode;
|
|
const option = context.options[0] || 'beside';
|
|
|
|
/**
|
|
* Validates the location of an arrow function body
|
|
* @param {ASTNode} node The arrow function body
|
|
* @returns {void}
|
|
*/
|
|
function validateExpression(node) {
|
|
if (node.body.type === 'BlockStatement') {
|
|
return;
|
|
}
|
|
|
|
const arrowToken = sourceCode.getTokenBefore(
|
|
node.body,
|
|
isNotOpeningParenToken
|
|
);
|
|
const firstTokenOfBody = sourceCode.getTokenAfter(arrowToken);
|
|
|
|
if (
|
|
arrowToken.loc.end.line === firstTokenOfBody.loc.start.line &&
|
|
option === 'below'
|
|
) {
|
|
context.report({
|
|
node: firstTokenOfBody,
|
|
messageId: 'expected',
|
|
fix: (fixer) => fixer.insertTextBefore(firstTokenOfBody, '\n'),
|
|
});
|
|
} else if (
|
|
arrowToken.loc.end.line !== firstTokenOfBody.loc.start.line &&
|
|
option === 'beside'
|
|
) {
|
|
context.report({
|
|
node: firstTokenOfBody,
|
|
messageId: 'unexpected',
|
|
fix(fixer) {
|
|
if (
|
|
sourceCode.getFirstTokenBetween(arrowToken, firstTokenOfBody, {
|
|
includeComments: true,
|
|
filter: isCommentToken,
|
|
})
|
|
) {
|
|
return null;
|
|
}
|
|
|
|
return fixer.replaceTextRange(
|
|
[arrowToken.range[1], firstTokenOfBody.range[0]],
|
|
' '
|
|
);
|
|
},
|
|
});
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// Public
|
|
//----------------------------------------------------------------------
|
|
return {
|
|
ArrowFunctionExpression: (node) => validateExpression(node),
|
|
};
|
|
},
|
|
};
|