57 lines
1.4 KiB
JavaScript
57 lines
1.4 KiB
JavaScript
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/**
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* @fileoverview Rule to flag octal escape sequences in string literals.
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* @author Ian Christian Myers
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*/
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"use strict";
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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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type: "suggestion",
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docs: {
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description: "Disallow octal escape sequences in string literals",
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recommended: false,
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url: "https://eslint.org/docs/latest/rules/no-octal-escape"
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},
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schema: [],
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messages: {
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octalEscapeSequence: "Don't use octal: '\\{{sequence}}'. Use '\\u....' instead."
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}
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},
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create(context) {
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return {
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Literal(node) {
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if (typeof node.value !== "string") {
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return;
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}
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// \0 represents a valid NULL character if it isn't followed by a digit.
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const match = node.raw.match(
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/^(?:[^\\]|\\.)*?\\([0-3][0-7]{1,2}|[4-7][0-7]|0(?=[89])|[1-7])/su
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);
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if (match) {
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context.report({
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node,
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messageId: "octalEscapeSequence",
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data: { sequence: match[1] }
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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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