| /** |
| * @fileoverview Rule to flag when using constructor without parentheses |
| * @author Ilya Volodin |
| */ |
| |
| "use strict"; |
| |
| //------------------------------------------------------------------------------ |
| // Requirements |
| //------------------------------------------------------------------------------ |
| |
| const astUtils = require("../ast-utils"); |
| |
| //------------------------------------------------------------------------------ |
| // Helpers |
| //------------------------------------------------------------------------------ |
| |
| //------------------------------------------------------------------------------ |
| // Rule Definition |
| //------------------------------------------------------------------------------ |
| |
| module.exports = { |
| meta: { |
| docs: { |
| description: "require parentheses when invoking a constructor with no arguments", |
| category: "Stylistic Issues", |
| recommended: false, |
| url: "https://eslint.org/docs/rules/new-parens" |
| }, |
| |
| schema: [], |
| |
| fixable: "code" |
| }, |
| |
| create(context) { |
| const sourceCode = context.getSourceCode(); |
| |
| return { |
| NewExpression(node) { |
| if (node.arguments.length !== 0) { |
| return; // shortcut: if there are arguments, there have to be parens |
| } |
| |
| const lastToken = sourceCode.getLastToken(node); |
| const hasLastParen = lastToken && astUtils.isClosingParenToken(lastToken); |
| const hasParens = hasLastParen && astUtils.isOpeningParenToken(sourceCode.getTokenBefore(lastToken)); |
| |
| if (!hasParens) { |
| context.report({ |
| node, |
| message: "Missing '()' invoking a constructor.", |
| fix: fixer => fixer.insertTextAfter(node, "()") |
| }); |
| } |
| } |
| }; |
| } |
| }; |