116 lines
3.4 KiB
JavaScript
116 lines
3.4 KiB
JavaScript
/**
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* @fileoverview Rule to flag when using constructor without parentheses
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* @author Ilya Volodin
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* @deprecated in ESLint v8.53.0
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*/
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'use strict';
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//------------------------------------------------------------------------------
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// Requirements
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//------------------------------------------------------------------------------
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const astUtils = require('./utils/ast-utils');
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//------------------------------------------------------------------------------
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// Helpers
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//------------------------------------------------------------------------------
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//------------------------------------------------------------------------------
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// Rule Definition
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//------------------------------------------------------------------------------
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/** @type {import('../types').Rule.RuleModule} */
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module.exports = {
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meta: {
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deprecated: {
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message: 'Formatting rules are being moved out of ESLint core.',
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url: 'https://eslint.org/blog/2023/10/deprecating-formatting-rules/',
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deprecatedSince: '8.53.0',
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availableUntil: '10.0.0',
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replacedBy: [
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{
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message:
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'ESLint Stylistic now maintains deprecated stylistic core rules.',
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url: 'https://eslint.style/guide/migration',
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plugin: {
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name: '@stylistic/eslint-plugin-js',
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url: 'https://eslint.style/packages/js',
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},
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rule: {
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name: 'new-parens',
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url: 'https://eslint.style/rules/js/new-parens',
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},
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},
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],
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},
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type: 'layout',
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docs: {
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description:
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'Enforce or disallow parentheses when invoking a constructor with no arguments',
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recommended: false,
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url: 'https://eslint.org/docs/latest/rules/new-parens',
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},
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fixable: 'code',
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schema: [
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{
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enum: ['always', 'never'],
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},
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],
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messages: {
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missing: "Missing '()' invoking a constructor.",
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unnecessary: "Unnecessary '()' invoking a constructor with no arguments.",
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},
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},
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create(context) {
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const options = context.options;
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const always = options[0] !== 'never'; // Default is always
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const sourceCode = context.sourceCode;
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return {
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NewExpression(node) {
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if (node.arguments.length !== 0) {
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return; // if there are arguments, there have to be parens
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}
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const lastToken = sourceCode.getLastToken(node);
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const hasLastParen =
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lastToken && astUtils.isClosingParenToken(lastToken);
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// `hasParens` is true only if the new expression ends with its own parens, e.g., new new foo() does not end with its own parens
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const hasParens =
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hasLastParen &&
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astUtils.isOpeningParenToken(sourceCode.getTokenBefore(lastToken)) &&
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node.callee.range[1] < node.range[1];
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if (always) {
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if (!hasParens) {
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context.report({
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node,
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messageId: 'missing',
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fix: (fixer) => fixer.insertTextAfter(node, '()'),
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});
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}
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} else {
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if (hasParens) {
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context.report({
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node,
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messageId: 'unnecessary',
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fix: (fixer) => [
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fixer.remove(sourceCode.getTokenBefore(lastToken)),
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fixer.remove(lastToken),
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fixer.insertTextBefore(node, '('),
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fixer.insertTextAfter(node, ')'),
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],
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});
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}
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}
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},
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};
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},
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};
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