99 lines
2.7 KiB
C++
99 lines
2.7 KiB
C++
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//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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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_iterators.h"
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int main()
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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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}
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