Differential D47360 Diff 219818 test/std/utilities/utility/mem.res/mem.res.aliases/header_regex_synop.pass.cpp

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test/std/utilities/utility/mem.res/mem.res.aliases/header_regex_synop.pass.cpp

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				//===----------------------------------------------------------------------===//
				//
				// The LLVM Compiler Infrastructure
				//
				// This file is dual licensed under the MIT and the University of Illinois Open
				// Source Licenses. See LICENSE.TXT for details.
				//
				//===----------------------------------------------------------------------===//

				// UNSUPPORTED: c++98, c++03

				// <regex>

				// namespace std::pmr {
				//
				// template <class BidirectionalIterator>
				// using match_results =
				// std::match_results<BidirectionalIterator,
				// polymorphic_allocator<sub_match<BidirectionalIterator>>>;
				//
				// typedef match_results<const char*> cmatch;
				// typedef match_results<const wchar_t*> wcmatch;
				// typedef match_results<string::const_iterator> smatch;
				// typedef match_results<wstring::const_iterator> wsmatch;
				//
				// } // namespace std::pmr

				#include <regex>
				#include <type_traits>
				#include <cassert>

				template <class Iter, class PmrTypedef>
				void test_match_result_typedef() {
				using StdMR = std::match_results<Iter, std::pmr::polymorphic_allocator<std::sub_match<Iter>>>;
				using PmrMR = std::pmr::match_results<Iter>;
				static_assert(std::is_same<StdMR, PmrMR>::value, "");
				static_assert(std::is_same<PmrMR, PmrTypedef>::value, "");
				}

				int main(int, char**)
				{
				{
				test_match_result_typedef<const char*, std::pmr::cmatch>();
				test_match_result_typedef<const wchar_t*, std::pmr::wcmatch>();
				test_match_result_typedef<std::pmr::string::const_iterator, std::pmr::smatch>();
				test_match_result_typedef<std::pmr::wstring::const_iterator, std::pmr::wsmatch>();
				}
				{
				// Check that std::match_results has been included and is complete.
				std::pmr::smatch s;
				assert(s.get_allocator().resource() == std::pmr::get_default_resource());
				}

				return 0;
				}