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eb39fafa DC |
1 | /** |
2 | * @fileoverview Rule to flag octal escape sequences in string literals. | |
3 | * @author Ian Christian Myers | |
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: "suggestion", | |
16 | ||
17 | docs: { | |
18 | description: "disallow octal escape sequences in string literals", | |
eb39fafa DC |
19 | recommended: false, |
20 | url: "https://eslint.org/docs/rules/no-octal-escape" | |
21 | }, | |
22 | ||
23 | schema: [], | |
24 | ||
25 | messages: { | |
26 | octalEscapeSequence: "Don't use octal: '\\{{sequence}}'. Use '\\u....' instead." | |
27 | } | |
28 | }, | |
29 | ||
30 | create(context) { | |
31 | ||
32 | return { | |
33 | ||
34 | Literal(node) { | |
35 | if (typeof node.value !== "string") { | |
36 | return; | |
37 | } | |
38 | ||
39 | // \0 represents a valid NULL character if it isn't followed by a digit. | |
40 | const match = node.raw.match( | |
41 | /^(?:[^\\]|\\.)*?\\([0-3][0-7]{1,2}|[4-7][0-7]|0(?=[89])|[1-7])/su | |
42 | ); | |
43 | ||
44 | if (match) { | |
45 | context.report({ | |
46 | node, | |
47 | messageId: "octalEscapeSequence", | |
48 | data: { sequence: match[1] } | |
49 | }); | |
50 | } | |
51 | } | |
52 | ||
53 | }; | |
54 | ||
55 | } | |
56 | }; |