f3b848fe5d
Update docs and tests for recent changes in the spec for unicode escapes in capture group names. https://github.com/tc39/proposal-regexp-named-groups/issues/23 BUG=v8:5437 Review-Url: https://codereview.chromium.org/2788423003 Cr-Commit-Position: refs/heads/master@{#44474}
406 lines
17 KiB
JavaScript
406 lines
17 KiB
JavaScript
// Copyright 2017 the V8 project authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
// Flags: --harmony-regexp-named-captures --harmony-regexp-lookbehind
|
|
|
|
// Malformed named captures.
|
|
assertThrows("/(?<>a)/u", SyntaxError); // Empty name.
|
|
assertThrows("/(?<aa)/u", SyntaxError); // Unterminated name.
|
|
assertThrows("/(?<42a>a)/u", SyntaxError); // Name starting with digits.
|
|
assertThrows("/(?<:a>a)/u", SyntaxError); // Name starting with invalid char.
|
|
assertThrows("/(?<a:>a)/u", SyntaxError); // Name containing with invalid char.
|
|
assertThrows("/(?<a>a)(?<a>a)/u", SyntaxError); // Duplicate name.
|
|
assertThrows("/(?<a>a)(?<b>b)(?<a>a)/u", SyntaxError); // Duplicate name.
|
|
assertThrows("/\\k<a>/u", SyntaxError); // Invalid reference.
|
|
assertThrows("/\\k<a/u", SyntaxError); // Unterminated reference.
|
|
assertThrows("/\\k/u", SyntaxError); // Lone \k.
|
|
assertThrows("/(?<a>.)\\k/u", SyntaxError); // Lone \k.
|
|
assertThrows("/(?<a>.)\\k<a/u", SyntaxError); // Unterminated reference.
|
|
assertThrows("/(?<a>.)\\k<b>/u", SyntaxError); // Invalid reference.
|
|
assertThrows("/(?<a>a)\\k<ab>/u", SyntaxError); // Invalid reference.
|
|
assertThrows("/(?<ab>a)\\k<a>/u", SyntaxError); // Invalid reference.
|
|
assertThrows("/\\k<a>(?<ab>a)/u", SyntaxError); // Invalid reference.
|
|
assertThrows("/(?<a>\\a)/u", SyntaxError); // Identity escape in capture.
|
|
|
|
// Behavior in non-unicode mode.
|
|
assertThrows("/(?<>a)/", SyntaxError);
|
|
assertThrows("/(?<aa)/", SyntaxError);
|
|
assertThrows("/(?<42a>a)/", SyntaxError);
|
|
assertThrows("/(?<:a>a)/", SyntaxError);
|
|
assertThrows("/(?<a:>a)/", SyntaxError);
|
|
assertThrows("/(?<a>a)(?<a>a)/", SyntaxError);
|
|
assertThrows("/(?<a>a)(?<b>b)(?<a>a)/", SyntaxError);
|
|
assertTrue(/\k<a>/.test("k<a>"));
|
|
assertTrue(/\k<4>/.test("k<4>"));
|
|
assertTrue(/\k<a/.test("k<a"));
|
|
assertTrue(/\k/.test("k"));
|
|
assertThrows("/(?<a>.)\\k/", SyntaxError);
|
|
assertThrows("/(?<a>.)\\k<a/", SyntaxError);
|
|
assertThrows("/(?<a>.)\\k<b>/", SyntaxError);
|
|
assertThrows("/(?<a>a)\\k<ab>/", SyntaxError);
|
|
assertThrows("/(?<ab>a)\\k<a>/", SyntaxError);
|
|
assertThrows("/\\k<a>(?<ab>a)/", SyntaxError);
|
|
assertThrows("/\\k<a(?<a>a)/", SyntaxError);
|
|
assertTrue(/(?<a>\a)/.test("a"));
|
|
|
|
assertEquals(["k<a>"], "xxxk<a>xxx".match(/\k<a>/));
|
|
assertEquals(["k<a"], "xxxk<a>xxx".match(/\k<a/));
|
|
|
|
assertEquals({a: "a", b: "b", c: "c"},
|
|
/(?<a>.)(?<b>.)(?<c>.)\k<c>\k<b>\k<a>/.exec("abccba").groups);
|
|
|
|
// A couple of corner cases around '\k' as named back-references vs. identity
|
|
// escapes.
|
|
assertTrue(/\k<a>(?<=>)a/.test("k<a>a"));
|
|
assertTrue(/\k<a>(?<!a)a/.test("k<a>a"));
|
|
assertTrue(/\k<a>(<a>x)/.test("k<a><a>x"));
|
|
assertTrue(/\k<a>(?<a>x)/.test("x"));
|
|
assertThrows("/\\k<a>(?<b>x)/", SyntaxError);
|
|
assertThrows("/\\k<a(?<a>.)/", SyntaxError);
|
|
assertThrows("/\\k(?<a>.)/", SyntaxError);
|
|
|
|
// Basic named groups.
|
|
assertEquals(["a", "a"], "bab".match(/(?<a>a)/u));
|
|
assertEquals(["a", "a"], "bab".match(/(?<a42>a)/u));
|
|
assertEquals(["a", "a"], "bab".match(/(?<_>a)/u));
|
|
assertEquals(["a", "a"], "bab".match(/(?<$>a)/u));
|
|
assertEquals(["bab", "a"], "bab".match(/.(?<$>a)./u));
|
|
assertEquals(["bab", "a", "b"], "bab".match(/.(?<a>a)(.)/u));
|
|
assertEquals(["bab", "a", "b"], "bab".match(/.(?<a>a)(?<b>.)/u));
|
|
assertEquals(["bab", "ab"], "bab".match(/.(?<a>\w\w)/u));
|
|
assertEquals(["bab", "bab"], "bab".match(/(?<a>\w\w\w)/u));
|
|
assertEquals(["bab", "ba", "b"], "bab".match(/(?<a>\w\w)(?<b>\w)/u));
|
|
|
|
assertEquals(["a", "a"], "bab".match(/(?<a>a)/));
|
|
assertEquals(["a", "a"], "bab".match(/(?<a42>a)/));
|
|
assertEquals(["a", "a"], "bab".match(/(?<_>a)/));
|
|
assertEquals(["a", "a"], "bab".match(/(?<$>a)/));
|
|
assertEquals(["bab", "a"], "bab".match(/.(?<$>a)./));
|
|
assertEquals(["bab", "a", "b"], "bab".match(/.(?<a>a)(.)/));
|
|
assertEquals(["bab", "a", "b"], "bab".match(/.(?<a>a)(?<b>.)/));
|
|
assertEquals(["bab", "ab"], "bab".match(/.(?<a>\w\w)/));
|
|
assertEquals(["bab", "bab"], "bab".match(/(?<a>\w\w\w)/));
|
|
assertEquals(["bab", "ba", "b"], "bab".match(/(?<a>\w\w)(?<b>\w)/));
|
|
|
|
assertEquals("bab".match(/(a)/u), "bab".match(/(?<a>a)/u));
|
|
assertEquals("bab".match(/(a)/u), "bab".match(/(?<a42>a)/u));
|
|
assertEquals("bab".match(/(a)/u), "bab".match(/(?<_>a)/u));
|
|
assertEquals("bab".match(/(a)/u), "bab".match(/(?<$>a)/u));
|
|
assertEquals("bab".match(/.(a)./u), "bab".match(/.(?<$>a)./u));
|
|
assertEquals("bab".match(/.(a)(.)/u), "bab".match(/.(?<a>a)(.)/u));
|
|
assertEquals("bab".match(/.(a)(.)/u), "bab".match(/.(?<a>a)(?<b>.)/u));
|
|
assertEquals("bab".match(/.(\w\w)/u), "bab".match(/.(?<a>\w\w)/u));
|
|
assertEquals("bab".match(/(\w\w\w)/u), "bab".match(/(?<a>\w\w\w)/u));
|
|
assertEquals("bab".match(/(\w\w)(\w)/u), "bab".match(/(?<a>\w\w)(?<b>\w)/u));
|
|
|
|
assertEquals(["bab", "b"], "bab".match(/(?<b>b).\1/u));
|
|
assertEquals(["baba", "b", "a"], "baba".match(/(.)(?<a>a)\1\2/u));
|
|
assertEquals(["baba", "b", "a", "b", "a"],
|
|
"baba".match(/(.)(?<a>a)(?<b>\1)(\2)/u));
|
|
assertEquals(["<a", "<"], "<a".match(/(?<lt><)a/u));
|
|
assertEquals([">a", ">"], ">a".match(/(?<gt>>)a/u));
|
|
|
|
// Named references.
|
|
assertEquals(["bab", "b"], "bab".match(/(?<b>.).\k<b>/u));
|
|
assertNull("baa".match(/(?<b>.).\k<b>/u));
|
|
|
|
// Nested groups.
|
|
assertEquals(["bab", "bab", "ab", "b"], "bab".match(/(?<a>.(?<b>.(?<c>.)))/u));
|
|
assertEquals({a: "bab", b: "ab", c: "b"},
|
|
"bab".match(/(?<a>.(?<b>.(?<c>.)))/u).groups);
|
|
|
|
// Reference inside group.
|
|
assertEquals(["bab", "b"], "bab".match(/(?<a>\k<a>\w)../u));
|
|
assertEquals({a: "b"}, "bab".match(/(?<a>\k<a>\w)../u).groups);
|
|
|
|
// Reference before group.
|
|
assertEquals(["bab", "b"], "bab".match(/\k<a>(?<a>b)\w\k<a>/u));
|
|
assertEquals({a: "b"}, "bab".match(/\k<a>(?<a>b)\w\k<a>/u).groups);
|
|
assertEquals(["bab", "b", "a"], "bab".match(/(?<b>b)\k<a>(?<a>a)\k<b>/u));
|
|
assertEquals({a: "a", b: "b"},
|
|
"bab".match(/(?<b>b)\k<a>(?<a>a)\k<b>/u).groups);
|
|
|
|
assertEquals(["bab", "b"], "bab".match(/\k<a>(?<a>b)\w\k<a>/));
|
|
assertEquals(["bab", "b", "a"], "bab".match(/(?<b>b)\k<a>(?<a>a)\k<b>/));
|
|
|
|
// Reference properties.
|
|
assertEquals("a", /(?<a>a)(?<b>b)\k<a>/u.exec("aba").groups.a);
|
|
assertEquals("b", /(?<a>a)(?<b>b)\k<a>/u.exec("aba").groups.b);
|
|
assertEquals(undefined, /(?<a>a)(?<b>b)\k<a>/u.exec("aba").groups.c);
|
|
assertEquals(undefined, /(?<a>a)(?<b>b)\k<a>|(?<c>c)/u.exec("aba").groups.c);
|
|
|
|
// Unicode names.
|
|
assertEquals("a", /(?<π>a)/u.exec("bab").groups.π);
|
|
assertEquals("a", /(?<\u{03C0}>a)/u.exec("bab").groups.π);
|
|
assertEquals("a", /(?<π>a)/u.exec("bab").groups.\u03C0);
|
|
assertEquals("a", /(?<\u{03C0}>a)/u.exec("bab").groups.\u03C0);
|
|
assertEquals("a", /(?<$>a)/u.exec("bab").groups.$);
|
|
assertEquals("a", /(?<_>a)/u.exec("bab").groups._);
|
|
assertEquals("a", /(?<$𐒤>a)/u.exec("bab").groups.$𐒤);
|
|
assertEquals("a", /(?<_\u200C>a)/u.exec("bab").groups._\u200C);
|
|
assertEquals("a", /(?<_\u200D>a)/u.exec("bab").groups._\u200D);
|
|
assertEquals("a", /(?<ಠ_ಠ>a)/u.exec("bab").groups.ಠ_ಠ);
|
|
assertThrows('/(?<❤>a)/u', SyntaxError);
|
|
assertThrows('/(?<𐒤>a)/u', SyntaxError); // ID_Continue but not ID_Start.
|
|
|
|
assertEquals("a", /(?<π>a)/.exec("bab").groups.π);
|
|
assertEquals("a", /(?<$>a)/.exec("bab").groups.$);
|
|
assertEquals("a", /(?<_>a)/.exec("bab").groups._);
|
|
assertEquals("a", /(?<$𐒤>a)/.exec("bab").groups.$𐒤);
|
|
assertEquals("a", /(?<ಠ_ಠ>a)/.exec("bab").groups.ಠ_ಠ);
|
|
assertThrows('/(?<❤>a)/', SyntaxError);
|
|
assertThrows('/(?<𐒤>a)/', SyntaxError); // ID_Continue but not ID_Start.
|
|
|
|
// Interaction with lookbehind assertions.
|
|
assertEquals(["f", "c"], "abcdef".match(/(?<=(?<a>\w){3})f/u));
|
|
assertEquals({a: "c"}, "abcdef".match(/(?<=(?<a>\w){3})f/u).groups);
|
|
assertEquals({a: "b"}, "abcdef".match(/(?<=(?<a>\w){4})f/u).groups);
|
|
assertEquals({a: "a"}, "abcdef".match(/(?<=(?<a>\w)+)f/u).groups);
|
|
assertNull("abcdef".match(/(?<=(?<a>\w){6})f/u));
|
|
|
|
assertEquals(["f", ""], "abcdef".match(/((?<=\w{3}))f/u));
|
|
assertEquals(["f", ""], "abcdef".match(/(?<a>(?<=\w{3}))f/u));
|
|
|
|
assertEquals(["f", undefined], "abcdef".match(/(?<!(?<a>\d){3})f/u));
|
|
assertNull("abcdef".match(/(?<!(?<a>\D){3})f/u));
|
|
|
|
assertEquals(["f", undefined], "abcdef".match(/(?<!(?<a>\D){3})f|f/u));
|
|
assertEquals(["f", undefined], "abcdef".match(/(?<a>(?<!\D{3}))f|f/u));
|
|
|
|
// Properties created on result.groups.
|
|
assertEquals(["fst", "snd"],
|
|
Object.getOwnPropertyNames(
|
|
/(?<fst>.)|(?<snd>.)/u.exec("abcd").groups));
|
|
|
|
// The '__proto__' property on the groups object.
|
|
assertEquals(undefined, /(?<a>.)/u.exec("a").groups.__proto__);
|
|
assertEquals("a", /(?<__proto__>a)/u.exec("a").groups.__proto__);
|
|
|
|
// Backslash as ID_Start and ID_Continue (v8:5868).
|
|
assertThrows("/(?<\\>.)/", SyntaxError); // '\' misclassified as ID_Start.
|
|
assertThrows("/(?<a\\>.)/", SyntaxError); // '\' misclassified as ID_Continue.
|
|
|
|
// Backreference before the group (exercises the capture mini-parser).
|
|
assertThrows("/\\1(?:.)/u", SyntaxError);
|
|
assertThrows("/\\1(?<=a)./u", SyntaxError);
|
|
assertThrows("/\\1(?<!a)./u", SyntaxError);
|
|
assertEquals(["a", "a"], /\1(?<a>.)/u.exec("abcd"));
|
|
|
|
// Unicode escapes in capture names.
|
|
assertTrue(/(?<a\uD801\uDCA4>.)/u.test("a")); // \u Lead \u Trail
|
|
assertThrows("/(?<a\\uD801>.)/u", SyntaxError); // \u Lead
|
|
assertThrows("/(?<a\\uDCA4>.)/u", SyntaxError); // \u Trail
|
|
assertTrue(/(?<\u0041>.)/u.test("a")); // \u NonSurrogate
|
|
assertTrue(/(?<\u{0041}>.)/u.test("a")); // \u{ Non-surrogate }
|
|
assertTrue(/(?<a\u{104A4}>.)/u.test("a")); // \u{ Surrogate, ID_Continue }
|
|
assertThrows("/(?<a\\u{110000}>.)/u", SyntaxError); // \u{ Out-of-bounds }
|
|
assertThrows("/(?<a\uD801>.)/u", SyntaxError); // Lead
|
|
assertThrows("/(?<a\uDCA4>.)/u", SyntaxError); // Trail
|
|
assertTrue(RegExp("(?<\u{0041}>.)", "u").test("a")); // Non-surrogate
|
|
assertTrue(RegExp("(?<a\u{104A4}>.)", "u").test("a")); // Surrogate,ID_Continue
|
|
|
|
assertThrows("/(?<a\\uD801\uDCA4>.)/", SyntaxError);
|
|
assertThrows("/(?<a\\uD801>.)/", SyntaxError);
|
|
assertThrows("/(?<a\\uDCA4>.)/", SyntaxError);
|
|
assertTrue(/(?<\u0041>.)/.test("a"));
|
|
assertThrows("/(?<\\u{0041}>.)/", SyntaxError);
|
|
assertThrows("/(?<a\\u{104A4}>.)/", SyntaxError);
|
|
assertThrows("/(?<a\\u{10FFFF}>.)/", SyntaxError);
|
|
assertThrows("/(?<a\uD801>.)/", SyntaxError); // Lead
|
|
assertThrows("/(?<a\uDCA4>.)/", SyntaxError); // Trail
|
|
assertTrue(RegExp("(?<\u{0041}>.)").test("a")); // Non-surrogate
|
|
assertTrue(RegExp("(?<a\u{104A4}>.)").test("a")); // Surrogate, ID_Continue
|
|
|
|
// @@replace with a callable replacement argument (no named captures).
|
|
{
|
|
let result = "abcd".replace(/(.)(.)/u, (match, fst, snd, offset, str) => {
|
|
assertEquals("ab", match);
|
|
assertEquals("a", fst);
|
|
assertEquals("b", snd);
|
|
assertEquals(0, offset);
|
|
assertEquals("abcd", str);
|
|
return `${snd}${fst}`;
|
|
});
|
|
assertEquals("bacd", result);
|
|
|
|
assertEquals("undefinedbcd", "abcd".replace(/(.)|(.)/u,
|
|
(match, fst, snd, offset, str) => snd));
|
|
}
|
|
|
|
// @@replace with a callable replacement argument (global, named captures).
|
|
{
|
|
let i = 0;
|
|
let result = "abcd".replace(/(?<fst>.)(?<snd>.)/gu,
|
|
(match, fst, snd, offset, str, groups) => {
|
|
if (i == 0) {
|
|
assertEquals("ab", match);
|
|
assertEquals("a", groups.fst);
|
|
assertEquals("b", groups.snd);
|
|
assertEquals("a", fst);
|
|
assertEquals("b", snd);
|
|
assertEquals(0, offset);
|
|
assertEquals("abcd", str);
|
|
} else if (i == 1) {
|
|
assertEquals("cd", match);
|
|
assertEquals("c", groups.fst);
|
|
assertEquals("d", groups.snd);
|
|
assertEquals("c", fst);
|
|
assertEquals("d", snd);
|
|
assertEquals(2, offset);
|
|
assertEquals("abcd", str);
|
|
} else {
|
|
assertUnreachable();
|
|
}
|
|
i++;
|
|
return `${groups.snd}${groups.fst}`;
|
|
});
|
|
assertEquals("badc", result);
|
|
|
|
assertEquals("undefinedundefinedundefinedundefined",
|
|
"abcd".replace(/(?<fst>.)|(?<snd>.)/gu,
|
|
(match, fst, snd, offset, str, groups) => groups.snd));
|
|
}
|
|
|
|
// @@replace with a callable replacement argument (non-global, named captures).
|
|
{
|
|
let result = "abcd".replace(/(?<fst>.)(?<snd>.)/u,
|
|
(match, fst, snd, offset, str, groups) => {
|
|
assertEquals("ab", match);
|
|
assertEquals("a", groups.fst);
|
|
assertEquals("b", groups.snd);
|
|
assertEquals("a", fst);
|
|
assertEquals("b", snd);
|
|
assertEquals(0, offset);
|
|
assertEquals("abcd", str);
|
|
return `${groups.snd}${groups.fst}`;
|
|
});
|
|
assertEquals("bacd", result);
|
|
|
|
assertEquals("undefinedbcd",
|
|
"abcd".replace(/(?<fst>.)|(?<snd>.)/u,
|
|
(match, fst, snd, offset, str, groups) => groups.snd));
|
|
}
|
|
|
|
function toSlowMode(re) {
|
|
re.exec = (str) => RegExp.prototype.exec.call(re, str);
|
|
return re;
|
|
}
|
|
|
|
// @@replace with a callable replacement argument (slow, global,
|
|
// named captures).
|
|
{
|
|
let i = 0;
|
|
let re = toSlowMode(/(?<fst>.)(?<snd>.)/gu);
|
|
let result = "abcd".replace(re, (match, fst, snd, offset, str, groups) => {
|
|
if (i == 0) {
|
|
assertEquals("ab", match);
|
|
assertEquals("a", groups.fst);
|
|
assertEquals("b", groups.snd);
|
|
assertEquals("a", fst);
|
|
assertEquals("b", snd);
|
|
assertEquals(0, offset);
|
|
assertEquals("abcd", str);
|
|
} else if (i == 1) {
|
|
assertEquals("cd", match);
|
|
assertEquals("c", groups.fst);
|
|
assertEquals("d", groups.snd);
|
|
assertEquals("c", fst);
|
|
assertEquals("d", snd);
|
|
assertEquals(2, offset);
|
|
assertEquals("abcd", str);
|
|
} else {
|
|
assertUnreachable();
|
|
}
|
|
i++;
|
|
return `${groups.snd}${groups.fst}`;
|
|
});
|
|
assertEquals("badc", result);
|
|
|
|
assertEquals("undefinedundefinedundefinedundefined",
|
|
"abcd".replace(toSlowMode(/(?<fst>.)|(?<snd>.)/gu),
|
|
(match, fst, snd, offset, str, groups) => groups.snd));
|
|
}
|
|
|
|
// @@replace with a callable replacement argument (slow, non-global,
|
|
// named captures).
|
|
{
|
|
let re = toSlowMode(/(?<fst>.)(?<snd>.)/u);
|
|
let result = "abcd".replace(re, (match, fst, snd, offset, str, groups) => {
|
|
assertEquals("ab", match);
|
|
assertEquals("a", groups.fst);
|
|
assertEquals("b", groups.snd);
|
|
assertEquals("a", fst);
|
|
assertEquals("b", snd);
|
|
assertEquals(0, offset);
|
|
assertEquals("abcd", str);
|
|
return `${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);
|
|
}
|