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27 lines
1.0 KiB
27 lines
1.0 KiB
2 years ago
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'use strict';
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var PROPER_FUNCTION_NAME = require('../internals/function-name').PROPER;
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var defineBuiltIn = require('../internals/define-built-in');
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var anObject = require('../internals/an-object');
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var $toString = require('../internals/to-string');
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var fails = require('../internals/fails');
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var getRegExpFlags = require('../internals/regexp-get-flags');
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var TO_STRING = 'toString';
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var RegExpPrototype = RegExp.prototype;
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var n$ToString = RegExpPrototype[TO_STRING];
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var NOT_GENERIC = fails(function () { return n$ToString.call({ source: 'a', flags: 'b' }) != '/a/b'; });
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// FF44- RegExp#toString has a wrong name
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var INCORRECT_NAME = PROPER_FUNCTION_NAME && n$ToString.name != TO_STRING;
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// `RegExp.prototype.toString` method
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// https://tc39.es/ecma262/#sec-regexp.prototype.tostring
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if (NOT_GENERIC || INCORRECT_NAME) {
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defineBuiltIn(RegExp.prototype, TO_STRING, function toString() {
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var R = anObject(this);
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var pattern = $toString(R.source);
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var flags = $toString(getRegExpFlags(R));
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return '/' + pattern + '/' + flags;
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}, { unsafe: true });
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}
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