23 lines
805 B
JavaScript
23 lines
805 B
JavaScript
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// Copyright 2016 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// lastIndex is set only for global or sticky RegExps. On failure to find
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// a match, it is set to 0. If a set fails, then it acts as if in strict mode
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// and throws.
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var re = /x/g;
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Object.defineProperty(re, 'lastIndex', {writable: false});
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assertThrows(() => re.exec(""), TypeError);
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assertThrows(() => re.exec("x"), TypeError);
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var re = /x/y;
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Object.defineProperty(re, 'lastIndex', {writable: false});
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assertThrows(() => re.exec(""), TypeError);
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assertThrows(() => re.exec("x"), TypeError);
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var re = /x/;
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Object.defineProperty(re, 'lastIndex', {writable: false});
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assertEquals(null, re.exec(""));
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assertEquals(["x"], re.exec("x"));
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