d52ec9e6cf
This implements storing named captures on the regexp result object.
For instance, /(?<a>.)/u.exec("b") will return a result such that:
result.group.a // "b"
https://tc39.github.io/proposal-regexp-named-groups/
BUG=v8:5437
Review-Url: https://codereview.chromium.org/2630233003
Cr-Original-Original-Original-Commit-Position: refs/heads/master@{#42532}
Committed: 70000946eb
Review-Url: https://codereview.chromium.org/2630233003
Cr-Original-Original-Commit-Position: refs/heads/master@{#42570}
Committed: ee94fa11ed
Review-Url: https://codereview.chromium.org/2630233003
Cr-Original-Commit-Position: refs/heads/master@{#42676}
Committed: 8bf52534f6
Review-Url: https://codereview.chromium.org/2630233003
Cr-Commit-Position: refs/heads/master@{#42838}
99 lines
4.5 KiB
JavaScript
99 lines
4.5 KiB
JavaScript
// Copyright 2015 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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// Flags: --harmony-regexp-named-captures
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// Malformed named captures.
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assertThrows("/(?<>a)/u"); // Empty name.
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assertThrows("/(?<aa)/u"); // Unterminated name.
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assertThrows("/(?<42a>a)/u"); // Name starting with digits.
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assertThrows("/(?<:a>a)/u"); // Name starting with invalid char.
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assertThrows("/(?<a:>a)/u"); // Name containing with invalid char.
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assertThrows("/(?<a>a)(?<a>a)/u"); // Duplicate name.
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assertThrows("/(?<a>a)(?<b>b)(?<a>a)/u"); // Duplicate name.
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assertThrows("/\\k<a>/u"); // Invalid reference.
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assertThrows("/(?<a>a)\\k<ab>/u"); // Invalid reference.
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assertThrows("/(?<ab>a)\\k<a>/u"); // Invalid reference.
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assertThrows("/\\k<a>(?<ab>a)/u"); // Invalid reference.
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// Fallback behavior in non-unicode mode.
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assertThrows("/(?<>a)/", SyntaxError);
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assertThrows("/(?<aa)/", SyntaxError);
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assertThrows("/(?<42a>a)/", SyntaxError);
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assertThrows("/(?<:a>a)/", SyntaxError);
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assertThrows("/(?<a:>a)/", SyntaxError);
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assertThrows("/(?<a>a)(?<a>a)/", SyntaxError);
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assertThrows("/(?<a>a)(?<b>b)(?<a>a)/", SyntaxError);
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assertThrows("/(?<a>a)\\k<ab>/", SyntaxError);
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assertThrows("/(?<ab>a)\\k<a>/", SyntaxError);
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assertEquals(["k<a>"], "xxxk<a>xxx".match(/\k<a>/));
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assertEquals(["k<a"], "xxxk<a>xxx".match(/\k<a/));
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// Basic named groups.
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assertEquals(["a", "a"], "bab".match(/(?<a>a)/u));
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assertEquals(["a", "a"], "bab".match(/(?<a42>a)/u));
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assertEquals(["a", "a"], "bab".match(/(?<_>a)/u));
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assertEquals(["a", "a"], "bab".match(/(?<$>a)/u));
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assertEquals(["bab", "a"], "bab".match(/.(?<$>a)./u));
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assertEquals(["bab", "a", "b"], "bab".match(/.(?<a>a)(.)/u));
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assertEquals(["bab", "a", "b"], "bab".match(/.(?<a>a)(?<b>.)/u));
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assertEquals(["bab", "ab"], "bab".match(/.(?<a>\w\w)/u));
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assertEquals(["bab", "bab"], "bab".match(/(?<a>\w\w\w)/u));
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assertEquals(["bab", "ba", "b"], "bab".match(/(?<a>\w\w)(?<b>\w)/u));
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assertEquals("bab".match(/(a)/u), "bab".match(/(?<a>a)/u));
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assertEquals("bab".match(/(a)/u), "bab".match(/(?<a42>a)/u));
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assertEquals("bab".match(/(a)/u), "bab".match(/(?<_>a)/u));
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assertEquals("bab".match(/(a)/u), "bab".match(/(?<$>a)/u));
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assertEquals("bab".match(/.(a)./u), "bab".match(/.(?<$>a)./u));
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assertEquals("bab".match(/.(a)(.)/u), "bab".match(/.(?<a>a)(.)/u));
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assertEquals("bab".match(/.(a)(.)/u), "bab".match(/.(?<a>a)(?<b>.)/u));
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assertEquals("bab".match(/.(\w\w)/u), "bab".match(/.(?<a>\w\w)/u));
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assertEquals("bab".match(/(\w\w\w)/u), "bab".match(/(?<a>\w\w\w)/u));
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assertEquals("bab".match(/(\w\w)(\w)/u), "bab".match(/(?<a>\w\w)(?<b>\w)/u));
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assertEquals(["bab", "b"], "bab".match(/(?<b>b).\1/u));
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assertEquals(["baba", "b", "a"], "baba".match(/(.)(?<a>a)\1\2/u));
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assertEquals(["baba", "b", "a", "b", "a"],
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"baba".match(/(.)(?<a>a)(?<b>\1)(\2)/u));
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assertEquals(["<a", "<"], "<a".match(/(?<lt><)a/u));
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assertEquals([">a", ">"], ">a".match(/(?<gt>>)a/u));
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// Named references.
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assertEquals(["bab", "b"], "bab".match(/(?<b>.).\k<b>/u));
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assertNull("baa".match(/(?<b>.).\k<b>/u));
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// Nested groups.
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assertEquals(["bab", "bab", "ab", "b"], "bab".match(/(?<a>.(?<b>.(?<c>.)))/u));
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// Reference inside group.
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assertEquals(["bab", "b"], "bab".match(/(?<a>\k<a>\w)../u));
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// Reference before group.
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assertEquals(["bab", "b"], "bab".match(/\k<a>(?<a>b)\w\k<a>/u));
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assertEquals(["bab", "b", "a"], "bab".match(/(?<b>b)\k<a>(?<a>a)\k<b>/u));
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// Reference properties.
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assertEquals("a", /(?<a>a)(?<b>b)\k<a>/u.exec("aba").group.a);
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assertEquals("b", /(?<a>a)(?<b>b)\k<a>/u.exec("aba").group.b);
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assertEquals(undefined, /(?<a>a)(?<b>b)\k<a>/u.exec("aba").group.c);
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assertEquals(undefined, /(?<a>a)(?<b>b)\k<a>|(?<c>c)/u.exec("aba").group.c);
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// Unicode names.
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assertEquals("a", /(?<π>a)/u.exec("bab").group.π);
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assertEquals("a", /(?<\u{03C0}>a)/u.exec("bab").group.\u03C0);
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assertEquals("a", /(?<$>a)/u.exec("bab").group.$);
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assertEquals("a", /(?<_>a)/u.exec("bab").group._);
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assertEquals("a", /(?<$𐒤>a)/u.exec("bab").group.$𐒤);
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assertEquals("a", /(?<_\u200C>a)/u.exec("bab").group._\u200C);
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assertEquals("a", /(?<_\u200D>a)/u.exec("bab").group._\u200D);
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assertEquals("a", /(?<ಠ_ಠ>a)/u.exec("bab").group.ಠ_ಠ);
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assertThrows('/(?<❤>a)/u', SyntaxError);
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assertThrows('/(?<𐒤>a)/u', SyntaxError); // ID_Continue but not ID_Start.
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// The '__proto__' property on the groups object.
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assertEquals(undefined, /(?<a>.)/u.exec("a").group.__proto__);
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assertEquals("a", /(?<__proto__>a)/u.exec("a").group.__proto__);
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