f918404590
Reason for revert:
The decision for the specification was to not have this syntax, and instead the syntax before this patch.
Original issue's description:
> [regexp] Support unicode capture names in non-unicode patterns
>
> This ensures that capture names containing surrogate pairs are parsed
> correctly even in non-unicode RegExp patterns by introducing a new
> scanning mode which unconditionally combines surrogate pairs.
>
> BUG=v8:5437,v8:6192
>
> Review-Url: https://codereview.chromium.org/2791163003
> Cr-Commit-Position: refs/heads/master@{#44466}
> Committed: a8651c5671
R=yangguo@chromium.org,jgruber@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=v8:5437,v8:6192
Review-Url: https://codereview.chromium.org/2859933003
Cr-Commit-Position: refs/heads/master@{#45088}
416 lines
17 KiB
JavaScript
416 lines
17 KiB
JavaScript
// Copyright 2017 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 --harmony-regexp-lookbehind
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// Malformed named captures.
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assertThrows("/(?<>a)/u", SyntaxError); // Empty name.
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assertThrows("/(?<aa)/u", SyntaxError); // Unterminated name.
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assertThrows("/(?<42a>a)/u", SyntaxError); // Name starting with digits.
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assertThrows("/(?<:a>a)/u", SyntaxError); // Name starting with invalid char.
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assertThrows("/(?<a:>a)/u", SyntaxError); // Name containing with invalid char.
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assertThrows("/(?<a>a)(?<a>a)/u", SyntaxError); // Duplicate name.
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assertThrows("/(?<a>a)(?<b>b)(?<a>a)/u", SyntaxError); // Duplicate name.
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assertThrows("/\\k<a>/u", SyntaxError); // Invalid reference.
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assertThrows("/\\k<a/u", SyntaxError); // Unterminated reference.
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assertThrows("/\\k/u", SyntaxError); // Lone \k.
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assertThrows("/(?<a>.)\\k/u", SyntaxError); // Lone \k.
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assertThrows("/(?<a>.)\\k<a/u", SyntaxError); // Unterminated reference.
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assertThrows("/(?<a>.)\\k<b>/u", SyntaxError); // Invalid reference.
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assertThrows("/(?<a>a)\\k<ab>/u", SyntaxError); // Invalid reference.
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assertThrows("/(?<ab>a)\\k<a>/u", SyntaxError); // Invalid reference.
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assertThrows("/\\k<a>(?<ab>a)/u", SyntaxError); // Invalid reference.
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assertThrows("/(?<a>\\a)/u", SyntaxError); // Identity escape in capture.
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// 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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assertTrue(/\k<a>/.test("k<a>"));
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assertTrue(/\k<4>/.test("k<4>"));
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assertTrue(/\k<a/.test("k<a"));
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assertTrue(/\k/.test("k"));
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assertThrows("/(?<a>.)\\k/", SyntaxError);
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assertThrows("/(?<a>.)\\k<a/", SyntaxError);
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assertThrows("/(?<a>.)\\k<b>/", 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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assertThrows("/\\k<a>(?<ab>a)/", SyntaxError);
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assertThrows("/\\k<a(?<a>a)/", SyntaxError);
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assertTrue(/(?<a>\a)/.test("a"));
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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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assertEquals({a: "a", b: "b", c: "c"},
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/(?<a>.)(?<b>.)(?<c>.)\k<c>\k<b>\k<a>/.exec("abccba").groups);
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// A couple of corner cases around '\k' as named back-references vs. identity
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// escapes.
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assertTrue(/\k<a>(?<=>)a/.test("k<a>a"));
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assertTrue(/\k<a>(?<!a)a/.test("k<a>a"));
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assertTrue(/\k<a>(<a>x)/.test("k<a><a>x"));
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assertTrue(/\k<a>(?<a>x)/.test("x"));
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assertThrows("/\\k<a>(?<b>x)/", SyntaxError);
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assertThrows("/\\k<a(?<a>.)/", SyntaxError);
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assertThrows("/\\k(?<a>.)/", SyntaxError);
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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(["a", "a"], "bab".match(/(?<a>a)/));
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assertEquals(["a", "a"], "bab".match(/(?<a42>a)/));
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assertEquals(["a", "a"], "bab".match(/(?<_>a)/));
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assertEquals(["a", "a"], "bab".match(/(?<$>a)/));
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assertEquals(["bab", "a"], "bab".match(/.(?<$>a)./));
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assertEquals(["bab", "a", "b"], "bab".match(/.(?<a>a)(.)/));
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assertEquals(["bab", "a", "b"], "bab".match(/.(?<a>a)(?<b>.)/));
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assertEquals(["bab", "ab"], "bab".match(/.(?<a>\w\w)/));
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assertEquals(["bab", "bab"], "bab".match(/(?<a>\w\w\w)/));
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assertEquals(["bab", "ba", "b"], "bab".match(/(?<a>\w\w)(?<b>\w)/));
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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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assertEquals({a: "bab", b: "ab", c: "b"},
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"bab".match(/(?<a>.(?<b>.(?<c>.)))/u).groups);
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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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assertEquals({a: "b"}, "bab".match(/(?<a>\k<a>\w)../u).groups);
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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({a: "b"}, "bab".match(/\k<a>(?<a>b)\w\k<a>/u).groups);
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assertEquals(["bab", "b", "a"], "bab".match(/(?<b>b)\k<a>(?<a>a)\k<b>/u));
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assertEquals({a: "a", b: "b"},
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"bab".match(/(?<b>b)\k<a>(?<a>a)\k<b>/u).groups);
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assertEquals(["bab", "b"], "bab".match(/\k<a>(?<a>b)\w\k<a>/));
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assertEquals(["bab", "b", "a"], "bab".match(/(?<b>b)\k<a>(?<a>a)\k<b>/));
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// Reference properties.
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assertEquals("a", /(?<a>a)(?<b>b)\k<a>/u.exec("aba").groups.a);
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assertEquals("b", /(?<a>a)(?<b>b)\k<a>/u.exec("aba").groups.b);
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assertEquals(undefined, /(?<a>a)(?<b>b)\k<a>/u.exec("aba").groups.c);
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assertEquals(undefined, /(?<a>a)(?<b>b)\k<a>|(?<c>c)/u.exec("aba").groups.c);
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// Unicode names.
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assertEquals("a", /(?<π>a)/u.exec("bab").groups.π);
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assertEquals("a", /(?<\u{03C0}>a)/u.exec("bab").groups.π);
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assertEquals("a", /(?<π>a)/u.exec("bab").groups.\u03C0);
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assertEquals("a", /(?<\u{03C0}>a)/u.exec("bab").groups.\u03C0);
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assertEquals("a", /(?<$>a)/u.exec("bab").groups.$);
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assertEquals("a", /(?<_>a)/u.exec("bab").groups._);
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assertEquals("a", /(?<$𐒤>a)/u.exec("bab").groups.$𐒤);
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assertEquals("a", /(?<_\u200C>a)/u.exec("bab").groups._\u200C);
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assertEquals("a", /(?<_\u200D>a)/u.exec("bab").groups._\u200D);
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assertEquals("a", /(?<ಠ_ಠ>a)/u.exec("bab").groups.ಠ_ಠ);
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assertThrows('/(?<❤>a)/u', SyntaxError);
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assertThrows('/(?<𐒤>a)/u', SyntaxError); // ID_Continue but not ID_Start.
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assertEquals("a", /(?<π>a)/.exec("bab").groups.π);
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assertEquals("a", /(?<$>a)/.exec("bab").groups.$);
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assertEquals("a", /(?<_>a)/.exec("bab").groups._);
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assertThrows("/(?<$𐒤>a)/", SyntaxError);
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assertEquals("a", /(?<ಠ_ಠ>a)/.exec("bab").groups.ಠ_ಠ);
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assertThrows('/(?<❤>a)/', SyntaxError);
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assertThrows('/(?<𐒤>a)/', SyntaxError); // ID_Continue but not ID_Start.
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// Interaction with lookbehind assertions.
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assertEquals(["f", "c"], "abcdef".match(/(?<=(?<a>\w){3})f/u));
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assertEquals({a: "c"}, "abcdef".match(/(?<=(?<a>\w){3})f/u).groups);
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assertEquals({a: "b"}, "abcdef".match(/(?<=(?<a>\w){4})f/u).groups);
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assertEquals({a: "a"}, "abcdef".match(/(?<=(?<a>\w)+)f/u).groups);
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assertNull("abcdef".match(/(?<=(?<a>\w){6})f/u));
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assertEquals(["f", ""], "abcdef".match(/((?<=\w{3}))f/u));
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assertEquals(["f", ""], "abcdef".match(/(?<a>(?<=\w{3}))f/u));
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assertEquals(["f", undefined], "abcdef".match(/(?<!(?<a>\d){3})f/u));
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assertNull("abcdef".match(/(?<!(?<a>\D){3})f/u));
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assertEquals(["f", undefined], "abcdef".match(/(?<!(?<a>\D){3})f|f/u));
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assertEquals(["f", undefined], "abcdef".match(/(?<a>(?<!\D{3}))f|f/u));
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// Properties created on result.groups.
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assertEquals(["fst", "snd"],
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Object.getOwnPropertyNames(
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/(?<fst>.)|(?<snd>.)/u.exec("abcd").groups));
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// The '__proto__' property on the groups object.
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assertEquals(undefined, /(?<a>.)/u.exec("a").groups.__proto__);
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assertEquals("a", /(?<__proto__>a)/u.exec("a").groups.__proto__);
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// Backslash as ID_Start and ID_Continue (v8:5868).
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assertThrows("/(?<\\>.)/", SyntaxError); // '\' misclassified as ID_Start.
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assertThrows("/(?<a\\>.)/", SyntaxError); // '\' misclassified as ID_Continue.
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// Backreference before the group (exercises the capture mini-parser).
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assertThrows("/\\1(?:.)/u", SyntaxError);
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assertThrows("/\\1(?<=a)./u", SyntaxError);
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assertThrows("/\\1(?<!a)./u", SyntaxError);
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assertEquals(["a", "a"], /\1(?<a>.)/u.exec("abcd"));
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// Unicode escapes in capture names.
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assertTrue(/(?<a\uD801\uDCA4>.)/u.test("a")); // \u Lead \u Trail
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assertThrows("/(?<a\\uD801>.)/u", SyntaxError); // \u Lead
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assertThrows("/(?<a\\uDCA4>.)/u", SyntaxError); // \u Trail
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assertTrue(/(?<\u0041>.)/u.test("a")); // \u NonSurrogate
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assertTrue(/(?<\u{0041}>.)/u.test("a")); // \u{ Non-surrogate }
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assertTrue(/(?<a\u{104A4}>.)/u.test("a")); // \u{ Surrogate, ID_Continue }
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assertThrows("/(?<a\\u{110000}>.)/u", SyntaxError); // \u{ Out-of-bounds }
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assertThrows("/(?<a\\uD801>.)/u", SyntaxError); // Lead
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assertThrows("/(?<a\\uDCA4>.)/u", SyntaxError); // Trail
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assertThrows("/(?<a\uD801>.)/u", SyntaxError); // Lead
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assertThrows("/(?<a\uDCA4>.)/u", SyntaxError); // Trail
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assertTrue(RegExp("(?<\\u{0041}>.)", "u").test("a")); // Non-surrogate
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assertTrue(RegExp("(?<a\\u{104A4}>.)", "u").test("a")); // Surrogate,ID_Continue
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assertTrue(RegExp("(?<\u{0041}>.)", "u").test("a")); // Non-surrogate
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assertTrue(RegExp("(?<a\u{104A4}>.)", "u").test("a")); // Surrogate,ID_Continue
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assertTrue(RegExp("(?<\\u0041>.)", "u").test("a")); // Non-surrogate
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assertThrows("/(?<a\\uD801\uDCA4>.)/", SyntaxError);
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assertThrows("/(?<a\\uD801>.)/", SyntaxError);
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assertThrows("/(?<a\\uDCA4>.)/", SyntaxError);
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assertTrue(/(?<\u0041>.)/.test("a"));
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assertThrows("/(?<\\u{0041}>.)/", SyntaxError);
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assertThrows("/(?<a\\u{104A4}>.)/", SyntaxError);
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assertThrows("/(?<a\\u{10FFFF}>.)/", SyntaxError);
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assertThrows("/(?<a\\uD801>.)/", SyntaxError); // Lead
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assertThrows("/(?<a\\uDCA4>.)/", SyntaxError); // Trail;
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assertThrows("/(?<a\uD801>.)/", SyntaxError); // Lead
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assertThrows("/(?<a\uDCA4>.)/", SyntaxError); // Trail
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assertThrows("/(?<\\u{0041}>.)/", SyntaxError); // Non-surrogate
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assertThrows("/(?<a\\u{104A4}>.)/", SyntaxError); // Surrogate, ID_Continue
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assertTrue(RegExp("(?<\u{0041}>.)").test("a")); // Non-surrogate
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assertThrows("(?<a\u{104A4}>.)", SyntaxError); // Surrogate, ID_Continue
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assertTrue(RegExp("(?<\\u0041>.)").test("a")); // Non-surrogate
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// @@replace with a callable replacement argument (no named captures).
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{
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let result = "abcd".replace(/(.)(.)/u, (match, fst, snd, offset, str) => {
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assertEquals("ab", match);
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assertEquals("a", fst);
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assertEquals("b", snd);
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assertEquals(0, offset);
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assertEquals("abcd", str);
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return `${snd}${fst}`;
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});
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assertEquals("bacd", result);
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assertEquals("undefinedbcd", "abcd".replace(/(.)|(.)/u,
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(match, fst, snd, offset, str) => snd));
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}
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// @@replace with a callable replacement argument (global, named captures).
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{
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let i = 0;
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let result = "abcd".replace(/(?<fst>.)(?<snd>.)/gu,
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(match, fst, snd, offset, str, groups) => {
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if (i == 0) {
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assertEquals("ab", match);
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assertEquals("a", groups.fst);
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assertEquals("b", groups.snd);
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assertEquals("a", fst);
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assertEquals("b", snd);
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assertEquals(0, offset);
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assertEquals("abcd", str);
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} else if (i == 1) {
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assertEquals("cd", match);
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assertEquals("c", groups.fst);
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assertEquals("d", groups.snd);
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assertEquals("c", fst);
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assertEquals("d", snd);
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assertEquals(2, offset);
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assertEquals("abcd", str);
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} else {
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assertUnreachable();
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}
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i++;
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return `${groups.snd}${groups.fst}`;
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});
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assertEquals("badc", result);
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assertEquals("undefinedundefinedundefinedundefined",
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"abcd".replace(/(?<fst>.)|(?<snd>.)/gu,
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(match, fst, snd, offset, str, groups) => groups.snd));
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}
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// @@replace with a callable replacement argument (non-global, named captures).
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{
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let result = "abcd".replace(/(?<fst>.)(?<snd>.)/u,
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(match, fst, snd, offset, str, groups) => {
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assertEquals("ab", match);
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assertEquals("a", groups.fst);
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assertEquals("b", groups.snd);
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assertEquals("a", fst);
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assertEquals("b", snd);
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assertEquals(0, offset);
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assertEquals("abcd", str);
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return `${groups.snd}${groups.fst}`;
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});
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assertEquals("bacd", result);
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assertEquals("undefinedbcd",
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"abcd".replace(/(?<fst>.)|(?<snd>.)/u,
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(match, fst, snd, offset, str, groups) => groups.snd));
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}
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function toSlowMode(re) {
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re.exec = (str) => RegExp.prototype.exec.call(re, str);
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return re;
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}
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// @@replace with a callable replacement argument (slow, global,
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// named captures).
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{
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let i = 0;
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let re = toSlowMode(/(?<fst>.)(?<snd>.)/gu);
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let result = "abcd".replace(re, (match, fst, snd, offset, str, groups) => {
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if (i == 0) {
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assertEquals("ab", match);
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assertEquals("a", groups.fst);
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assertEquals("b", groups.snd);
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assertEquals("a", fst);
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assertEquals("b", snd);
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assertEquals(0, offset);
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assertEquals("abcd", str);
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} else if (i == 1) {
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assertEquals("cd", match);
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assertEquals("c", groups.fst);
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assertEquals("d", groups.snd);
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assertEquals("c", fst);
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assertEquals("d", snd);
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assertEquals(2, offset);
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assertEquals("abcd", str);
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} else {
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assertUnreachable();
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}
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i++;
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return `${groups.snd}${groups.fst}`;
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});
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assertEquals("badc", result);
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assertEquals("undefinedundefinedundefinedundefined",
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"abcd".replace(toSlowMode(/(?<fst>.)|(?<snd>.)/gu),
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(match, fst, snd, offset, str, groups) => groups.snd));
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}
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// @@replace with a callable replacement argument (slow, non-global,
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// named captures).
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{
|
|
let re = toSlowMode(/(?<fst>.)(?<snd>.)/u);
|
|
let result = "abcd".replace(re, (match, fst, snd, offset, str, groups) => {
|
|
assertEquals("ab", match);
|
|
assertEquals("a", groups.fst);
|
|
assertEquals("b", groups.snd);
|
|
assertEquals("a", fst);
|
|
assertEquals("b", snd);
|
|
assertEquals(0, offset);
|
|
assertEquals("abcd", str);
|
|
return `${groups.snd}${groups.fst}`;
|
|
});
|
|
assertEquals("bacd", result);
|
|
|
|
assertEquals("undefinedbcd",
|
|
"abcd".replace(toSlowMode(/(?<fst>.)|(?<snd>.)/u),
|
|
(match, fst, snd, offset, str, groups) => groups.snd));
|
|
}
|
|
|
|
// @@replace with a string replacement argument (no named captures).
|
|
{
|
|
let re = /(.)(.)|(x)/u;
|
|
assertEquals("$<snd>$<fst>cd", "abcd".replace(re, "$<snd>$<fst>"));
|
|
assertEquals("bacd", "abcd".replace(re, "$2$1"));
|
|
assertEquals("cd", "abcd".replace(re, "$3"));
|
|
assertEquals("$<sndcd", "abcd".replace(re, "$<snd"));
|
|
assertEquals("$<42a>cd", "abcd".replace(re, "$<42$1>"));
|
|
assertEquals("$<fth>cd", "abcd".replace(re, "$<fth>"));
|
|
assertEquals("$<a>cd", "abcd".replace(re, "$<$1>"));
|
|
}
|
|
|
|
// @@replace with a string replacement argument (global, named captures).
|
|
{
|
|
let re = /(?<fst>.)(?<snd>.)|(?<thd>x)/gu;
|
|
assertEquals("badc", "abcd".replace(re, "$<snd>$<fst>"));
|
|
assertEquals("badc", "abcd".replace(re, "$2$1"));
|
|
assertEquals("", "abcd".replace(re, "$<thd>"));
|
|
assertThrows(() => "abcd".replace(re, "$<snd"), SyntaxError);
|
|
assertThrows(() => "abcd".replace(re, "$<42$1>"), SyntaxError);
|
|
assertThrows(() => "abcd".replace(re, "$<fth>"), SyntaxError);
|
|
assertThrows(() => "abcd".replace(re, "$<$1>"), SyntaxError);
|
|
}
|
|
|
|
// @@replace with a string replacement argument (non-global, named captures).
|
|
{
|
|
let re = /(?<fst>.)(?<snd>.)|(?<thd>x)/u;
|
|
assertEquals("bacd", "abcd".replace(re, "$<snd>$<fst>"));
|
|
assertEquals("bacd", "abcd".replace(re, "$2$1"));
|
|
assertEquals("cd", "abcd".replace(re, "$<thd>"));
|
|
assertThrows(() => "abcd".replace(re, "$<snd"), SyntaxError);
|
|
assertThrows(() => "abcd".replace(re, "$<42$1>"), SyntaxError);
|
|
assertThrows(() => "abcd".replace(re, "$<fth>"), SyntaxError);
|
|
assertThrows(() => "abcd".replace(re, "$<$1>"), SyntaxError);
|
|
}
|
|
|
|
// @@replace with a string replacement argument (slow, global, named captures).
|
|
{
|
|
let re = toSlowMode(/(?<fst>.)(?<snd>.)|(?<thd>x)/gu);
|
|
assertEquals("badc", "abcd".replace(re, "$<snd>$<fst>"));
|
|
assertEquals("badc", "abcd".replace(re, "$2$1"));
|
|
assertEquals("", "abcd".replace(re, "$<thd>"));
|
|
assertThrows(() => "abcd".replace(re, "$<snd"), SyntaxError);
|
|
assertThrows(() => "abcd".replace(re, "$<42$1>"), SyntaxError);
|
|
assertThrows(() => "abcd".replace(re, "$<fth>"), SyntaxError);
|
|
assertThrows(() => "abcd".replace(re, "$<$1>"), SyntaxError);
|
|
}
|
|
|
|
// @@replace with a string replacement argument (slow, non-global,
|
|
// named captures).
|
|
{
|
|
let re = toSlowMode(/(?<fst>.)(?<snd>.)|(?<thd>x)/u);
|
|
assertEquals("bacd", "abcd".replace(re, "$<snd>$<fst>"));
|
|
assertEquals("bacd", "abcd".replace(re, "$2$1"));
|
|
assertEquals("cd", "abcd".replace(re, "$<thd>"));
|
|
assertThrows(() => "abcd".replace(re, "$<snd"), SyntaxError);
|
|
assertThrows(() => "abcd".replace(re, "$<42$1>"), SyntaxError);
|
|
assertThrows(() => "abcd".replace(re, "$<fth>"), SyntaxError);
|
|
assertThrows(() => "abcd".replace(re, "$<$1>"), SyntaxError);
|
|
}
|