1564396449
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94 lines
3.2 KiB
JavaScript
94 lines
3.2 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('../shared/types').Rule} */
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module.exports = {
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meta: {
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deprecated: true,
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replacedBy: [],
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type: "layout",
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docs: {
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description: "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 = 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 = 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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