.config/coc/extensions/node_modules/coc-prettier/node_modules/eslint/lib/rules/no-octal-escape.js

   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
  12 module.exports = {
  13     meta: {
  14         type: "suggestion",
  15
  16         docs: {
  17             description: "disallow octal escape sequences in string literals",
  18             category: "Best Practices",
  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 };