101 lines
2.7 KiB
C++
101 lines
2.7 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// <regex>
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// template <class BidirectionalIterator, class Allocator, class charT, class traits>
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// bool
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// regex_match(BidirectionalIterator first, BidirectionalIterator last,
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// match_results<BidirectionalIterator, Allocator>& m,
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// const basic_regex<charT, traits>& e,
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// regex_constants::match_flag_type flags = regex_constants::match_default);
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// std::regex in ECMAScript mode should not ignore capture groups inside lookahead assertions.
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// For example, matching /(?=(a))(a)/ to "a" should yield two captures: \1 = "a", \2 = "a"
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#include <regex>
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#include <cassert>
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#include "test_macros.h"
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#include "test_iterators.h"
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int main(int, char**)
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{
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{
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std::regex re("^(?=(.))a$");
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assert(re.mark_count() == 1);
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std::string s("a");
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std::smatch m;
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assert(std::regex_match(s, m, re));
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assert(m.size() == 2);
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assert(m[0] == "a");
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assert(m[1] == "a");
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}
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{
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std::regex re("^(a)(?=(.))(b)$");
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assert(re.mark_count() == 3);
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std::string s("ab");
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std::smatch m;
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assert(std::regex_match(s, m, re));
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assert(m.size() == 4);
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assert(m[0] == "ab");
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assert(m[1] == "a");
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assert(m[2] == "b");
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assert(m[3] == "b");
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}
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{
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std::regex re("^(.)(?=(.)(?=.(.)))(...)$");
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assert(re.mark_count() == 4);
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std::string s("abcd");
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std::smatch m;
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assert(std::regex_match(s, m, re));
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assert(m.size() == 5);
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assert(m[0] == "abcd");
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assert(m[1] == "a");
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assert(m[2] == "b");
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assert(m[3] == "d");
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assert(m[4] == "bcd");
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}
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{
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std::regex re("^(a)(?!([^b]))(.c)$");
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assert(re.mark_count() == 3);
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std::string s("abc");
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std::smatch m;
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assert(std::regex_match(s, m, re));
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assert(m.size() == 4);
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assert(m[0] == "abc");
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assert(m[1] == "a");
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assert(m[2] == "");
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assert(m[3] == "bc");
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}
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{
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std::regex re("^(?!((b)))(?=(.))(?!(abc)).b$");
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assert(re.mark_count() == 4);
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std::string s("ab");
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std::smatch m;
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assert(std::regex_match(s, m, re));
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assert(m.size() == 5);
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assert(m[0] == "ab");
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assert(m[1] == "");
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assert(m[2] == "");
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assert(m[3] == "a");
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assert(m[4] == "");
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}
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return 0;
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}
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