libstdc++-v3/testsuite/22_locale/conversions/string/requirements/typedefs-2.cc

   1 // { dg-do compile { target c++11 } }
   2
   3 // Copyright (C) 2015-2019 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 // 22.3.3.2.2  String conversions
  21
  22 #include <locale>
  23 #include <string>
  24 #include <type_traits>
  25 #include <testsuite_allocator.h>
  26
  27 template<typename T>
  28   using alloc = __gnu_test::uneq_allocator<T>;
  29
  30 template<typename C>
  31   using Str = std::basic_string<C, std::char_traits<C>, alloc<C>>;
  32
  33 struct cvt : std::codecvt<wchar_t, char, std::mbstate_t> { };
  34
  35 using wconv = std::wstring_convert<cvt, wchar_t, alloc<wchar_t>, alloc<char>>;
  36
  37 static_assert( std::is_same<wconv::byte_string, Str<char>>::value,
  38                "byte string is std::string" );
  39 static_assert( std::is_same<wconv::wide_string, Str<wchar_t>>::value,
  40                "wide string is std::wstring" );