Stevie Strickland
4028fec3b5
This work pulls in v8 support for these features with appropriate changes for Dart and closes https://github.com/dart-lang/sdk/issues/34935. This adds support for the following features: * Interpreting patterns as Unicode patterns instead of BMP patterns * the dotAll flag (`/s`) for changing the behavior of '.' to also match line terminators * Escapes for character classes described by Unicode property groups (e.g., \p{Greek} to match all Greek characters, or \P{Greek} for all non-Greek characters). The following TC39 proposals describe some of the added features: * https://github.com/tc39/proposal-regexp-dotall-flag * https://github.com/tc39/proposal-regexp-unicode-property-escapes These additional changes are included: * Extends named capture group names to include the full range of identifier characters supported by ECMAScript, not just ASCII. * Changing the RegExp interface to return RegExpMatch objects, not Match objects, so that downcasting is not necessary to use named capture groups from Dart **Note**: The changes to the RegExp interface are a breaking change for implementers of the RegExp interface. Current users of the RegExp interface (i.e., code using Dart RegExp objects) will not be affected. Change-Id: Ie62e6082a0e2fedc1680ef2576ce0c6db80fc19a Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/100641 Reviewed-by: Martin Kustermann <kustermann@google.com> Commit-Queue: Stevie Strickland <sstrickl@google.com>
82 lines
3.4 KiB
Dart
82 lines
3.4 KiB
Dart
// Copyright (c) 2019, the Dart project authors. All rights reserved.
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// Copyright 2016 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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import 'package:expect/expect.dart';
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import 'v8_regexp_utils.dart';
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String replace(String string) {
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return string
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.replaceAll("L", "\ud800")
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.replaceAll("l", "\ud801")
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.replaceAll("T", "\udc00")
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.replaceAll(".", "[^]");
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}
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void test(List<String> expectation, String regexp_source, String subject) {
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if (expectation != null) expectation = expectation.map(replace).toList();
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subject = replace(subject);
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regexp_source = replace(regexp_source);
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shouldBe(new RegExp(regexp_source, unicode: true).firstMatch(subject),
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expectation);
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}
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void main() {
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// Back reference does not end in the middle of a surrogate pair.
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test(null, "(L)\\1", "LLT");
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test(["LLTLl", "L", "l"], "(L).*\\1(.)", "LLTLl");
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test(null, "(aL).*\\1", "aLaLT");
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test(["aLaLTaLl", "aL", "l"], "(aL).*\\1(.)", "aLaLTaLl");
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var s = "TabcLxLTabcLxTabcLTyTabcLz";
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test([s, "TabcL", "z"], "([^x]+).*\\1(.)", s);
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// Back reference does not start in the middle of a surrogate pair.
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test(["TLTabTc", "T", "c"], "(T).*\\1(.)", "TLTabTc");
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// Lookbehinds.
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test(null, "(?<=\\1(T)x)", "LTTx");
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test(["", "b", "T"], "(?<=(.)\\2.*(T)x)", "bTaLTTx");
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test(null, "(?<=\\1.*(L)x)", "LTLx");
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test(["", "b", "L"], "(?<=(.)\\2.*(L)x)", "bLaLTLx");
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test(null, "([^x]+)x*\\1", "LxLT");
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test(null, "([^x]+)x*\\1", "TxLT");
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test(null, "([^x]+)x*\\1", "LTxL");
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test(null, "([^x]+)x*\\1", "LTxT");
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test(null, "([^x]+)x*\\1", "xLxLT");
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test(null, "([^x]+)x*\\1", "xTxLT");
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test(null, "([^x]+)x*\\1", "xLTxL");
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test(null, "([^x]+)x*\\1", "xLTxT");
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test(null, "([^x]+)x*\\1", "xxxLxxLTxx");
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test(null, "([^x]+)x*\\1", "xxxTxxLTxx");
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test(null, "([^x]+)x*\\1", "xxxLTxxLxx");
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test(null, "([^x]+)x*\\1", "xxxLTxxTxx");
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test(["LTTxxLTT", "LTT"], "([^x]+)x*\\1", "xxxLTTxxLTTxx");
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}
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