mirror of
https://github.com/whoisclebs/lodash.git
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77 lines
2.6 KiB
JavaScript
77 lines
2.6 KiB
JavaScript
/**
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* lodash 3.0.1 (Custom Build) <https://lodash.com/>
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* Build: `lodash modern modularize exports="npm" -o ./`
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* Copyright 2012-2015 The Dojo Foundation <http://dojofoundation.org/>
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* Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
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* Copyright 2009-2015 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
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* Available under MIT license <https://lodash.com/license>
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*/
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var baseToString = require('lodash._basetostring');
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/**
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* Used to match `RegExp` [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns)
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* and those outlined by [`EscapeRegExpPattern`](http://ecma-international.org/ecma-262/6.0/#sec-escaperegexppattern).
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*/
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var reRegExpChars = /^[:!,]|[\\^$.*+?()[\]{}|\/]|(^[0-9a-fA-Fnrtuvx])|([\n\r\u2028\u2029])/g,
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reHasRegExpChars = RegExp(reRegExpChars.source);
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/** Used to escape characters for inclusion in compiled regexes. */
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var regexpEscapes = {
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'0': 'x30', '1': 'x31', '2': 'x32', '3': 'x33', '4': 'x34',
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'5': 'x35', '6': 'x36', '7': 'x37', '8': 'x38', '9': 'x39',
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'A': 'x41', 'B': 'x42', 'C': 'x43', 'D': 'x44', 'E': 'x45', 'F': 'x46',
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'a': 'x61', 'b': 'x62', 'c': 'x63', 'd': 'x64', 'e': 'x65', 'f': 'x66',
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'n': 'x6e', 'r': 'x72', 't': 'x74', 'u': 'x75', 'v': 'x76', 'x': 'x78'
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};
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/** Used to escape characters for inclusion in compiled string literals. */
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var stringEscapes = {
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'\\': '\\',
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"'": "'",
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'\n': 'n',
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'\r': 'r',
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'\u2028': 'u2028',
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'\u2029': 'u2029'
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};
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/**
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* Used by `_.escapeRegExp` to escape characters for inclusion in compiled regexes.
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*
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* @private
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* @param {string} chr The matched character to escape.
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* @param {string} leadingChar The capture group for a leading character.
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* @param {string} whitespaceChar The capture group for a whitespace character.
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* @returns {string} Returns the escaped character.
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*/
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function escapeRegExpChar(chr, leadingChar, whitespaceChar) {
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if (leadingChar) {
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chr = regexpEscapes[chr];
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} else if (whitespaceChar) {
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chr = stringEscapes[chr];
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}
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return '\\' + chr;
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}
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/**
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* Escapes the `RegExp` special characters "\", "/", "^", "$", ".", "|", "?",
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* "*", "+", "(", ")", "[", "]", "{" and "}" in `string`.
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*
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* @static
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* @memberOf _
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* @category String
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* @param {string} [string=''] The string to escape.
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* @returns {string} Returns the escaped string.
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* @example
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*
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* _.escapeRegExp('[lodash](https://lodash.com/)');
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* // => '\[lodash\]\(https:\/\/lodash\.com\/\)'
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*/
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function escapeRegExp(string) {
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string = baseToString(string);
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return (string && reHasRegExpChars.test(string))
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? string.replace(reRegExpChars, escapeRegExpChar)
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: (string || '(?:)');
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}
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module.exports = escapeRegExp;
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