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eb39fafa DC |
1 | /** |
2 | * @fileoverview Rule to disallow use of the new operator with the `Symbol` object | |
3 | * @author Alberto RodrÃguez | |
4 | */ | |
5 | ||
6 | "use strict"; | |
7 | ||
8 | //------------------------------------------------------------------------------ | |
9 | // Rule Definition | |
10 | //------------------------------------------------------------------------------ | |
11 | ||
34eeec05 | 12 | /** @type {import('../shared/types').Rule} */ |
eb39fafa DC |
13 | module.exports = { |
14 | meta: { | |
15 | type: "problem", | |
16 | ||
17 | docs: { | |
8f9d1d4d | 18 | description: "Disallow `new` operators with the `Symbol` object", |
eb39fafa | 19 | recommended: true, |
f2a92ac6 | 20 | url: "https://eslint.org/docs/latest/rules/no-new-symbol" |
eb39fafa DC |
21 | }, |
22 | ||
23 | schema: [], | |
24 | ||
25 | messages: { | |
26 | noNewSymbol: "`Symbol` cannot be called as a constructor." | |
27 | } | |
28 | }, | |
29 | ||
30 | create(context) { | |
31 | ||
f2a92ac6 DC |
32 | const sourceCode = context.sourceCode; |
33 | ||
eb39fafa | 34 | return { |
f2a92ac6 DC |
35 | "Program:exit"(node) { |
36 | const globalScope = sourceCode.getScope(node); | |
eb39fafa DC |
37 | const variable = globalScope.set.get("Symbol"); |
38 | ||
39 | if (variable && variable.defs.length === 0) { | |
40 | variable.references.forEach(ref => { | |
f2a92ac6 DC |
41 | const idNode = ref.identifier; |
42 | const parent = idNode.parent; | |
eb39fafa | 43 | |
f2a92ac6 | 44 | if (parent && parent.type === "NewExpression" && parent.callee === idNode) { |
eb39fafa | 45 | context.report({ |
f2a92ac6 | 46 | node: idNode, |
eb39fafa DC |
47 | messageId: "noNewSymbol" |
48 | }); | |
49 | } | |
50 | }); | |
51 | } | |
52 | } | |
53 | }; | |
54 | ||
55 | } | |
56 | }; |