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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.// This module is browser compatible.
// // For future forward-compatibility with regexp `v` flag, reservedCharMap is// // autogenerated from the ClassSetReservedDoublePunctuator,// // ClassSetSyntaxCharacter, and ClassSetReservedPunctuator categories in the// // draft spec.// // See https://github.com/tc39/proposal-regexp-v-flag#how-is-the-v-flag-different-from-the-u-flag// // and https://arai-a.github.io/ecma262-compare/snapshot.html?pr=2418#prod-ClassSetReservedDoublePunctuator// const reservedChars = [...new Set(['ClassSetReservedDoublePunctuator', 'ClassSetSyntaxCharacter', 'ClassSetReservedPunctuator'].map(n =>//   document.querySelector(`[name=${n}] emu-rhs`).textContent.replaceAll(/\s/g, '')// ).join(''))]// const reservedCharMap = Object.fromEntries(reservedChars//   .map(x => {//     try {//       for (const flag of 'gimsuy') {//         new RegExp(`\\${x}`, flag)//         new RegExp(`[\\${x}]`, flag)//       }//       return [x, `\\${x}`]//     } catch (e) {//       return [x, `\\x${x.codePointAt(0).toString(16).padStart(2, '0')}`]//     }//   }))
const reservedCharMap = {  "&": "\\x26",  "!": "\\x21",  "#": "\\x23",  "$": "\\$",  "%": "\\x25",  "*": "\\*",  "+": "\\+",  ",": "\\x2c",  ".": "\\.",  ":": "\\x3a",  ";": "\\x3b",  "<": "\\x3c",  "=": "\\x3d",  ">": "\\x3e",  "?": "\\?",  "@": "\\x40",  "^": "\\^",  "`": "\\x60",  "~": "\\x7e",  "(": "\\(",  ")": "\\)",  "[": "\\[",  "]": "\\]",  "{": "\\{",  "}": "\\}",  "/": "\\/",  "-": "\\x2d",  "\\": "\\\\",  "|": "\\|",};
const RX_REGEXP_ESCAPE = new RegExp(  `[${Object.values(reservedCharMap).join("")}]`,  "gu",);
/** * Escapes arbitrary text for interpolation into a regexp, such that it will * match exactly that text and nothing else. * * @example * ```ts * import { escape } from "https://deno.land/std@$STD_VERSION/regexp/mod.ts"; * import { assertEquals, assertMatch, assertNotMatch } from "https://deno.land/std@$STD_VERSION/assert/mod.ts"; * * const re = new RegExp(`^${escape(".")}$`, "u"); * * assertEquals("^\\.$", re.source); * assertMatch(".", re); * assertNotMatch("a", re); * ``` */export function escape(str: string): string {  return str.replaceAll(    RX_REGEXP_ESCAPE,    (m) => reservedCharMap[m as keyof typeof reservedCharMap],  );}