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

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 // UNSUPPORTED: c++03, c++11, c++14
  10 // UNSUPPORTED: no-localization
  11 // TODO: Change to XFAIL once https://github.com/llvm/llvm-project/issues/40340 is fixed
  12 // UNSUPPORTED: availability-pmr-missing
  13
  14 // <regex>
  15
  16 // namespace std::pmr {
  17 //
  18 //  template <class BidirectionalIterator>
  19 //  using match_results =
  20 //    std::match_results<BidirectionalIterator,
  21 //                       polymorphic_allocator<sub_match<BidirectionalIterator>>>;
  22 //
  23 //  typedef match_results<const char*> cmatch;
  24 //  typedef match_results<const wchar_t*> wcmatch;
  25 //  typedef match_results<string::const_iterator> smatch;
  26 //  typedef match_results<wstring::const_iterator> wsmatch;
  27 //
  28 // } // namespace std::pmr
  29
  30 #include <regex>
  31 #include <cassert>
  32 #include <memory_resource>
  33 #include <type_traits>
  34
  35 #include "test_macros.h"
  36
  37 template <class Iter, class PmrTypedef>
  38 void test_match_result_typedef() {
  39   using StdMR = std::match_results<Iter, std::pmr::polymorphic_allocator<std::sub_match<Iter>>>;
  40   using PmrMR = std::pmr::match_results<Iter>;
  41   static_assert(std::is_same<StdMR, PmrMR>::value, "");
  42   static_assert(std::is_same<PmrMR, PmrTypedef>::value, "");
  43 }
  44
  45 int main(int, char**) {
  46   {
  47     test_match_result_typedef<const char*, std::pmr::cmatch>();
  48     test_match_result_typedef<std::pmr::string::const_iterator, std::pmr::smatch>();
  49 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
  50     test_match_result_typedef<const wchar_t*, std::pmr::wcmatch>();
  51     test_match_result_typedef<std::pmr::wstring::const_iterator, std::pmr::wsmatch>();
  52 #endif
  53   }
  54   {
  55     // Check that std::match_results has been included and is complete.
  56     std::pmr::smatch s;
  57     assert(s.get_allocator().resource() == std::pmr::get_default_resource());
  58   }
  59
  60   return 0;
  61 }