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

   1 // { dg-do compile }
   2 // { dg-options "-std=gnu++11" }
   3
   4 // Copyright (C) 2015-2016 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 // 22.3.3.2.2  String conversions
  22
  23 #include <locale>
  24 #include <string>
  25 #include <type_traits>
  26 #include <testsuite_allocator.h>
  27
  28 template<typename T>
  29   using alloc = __gnu_test::uneq_allocator<T>;
  30
  31 template<typename C>
  32   using Str = std::basic_string<C, std::char_traits<C>, alloc<C>>;
  33
  34 struct cvt : std::codecvt<wchar_t, char, std::mbstate_t> { };
  35
  36 using wconv = std::wstring_convert<cvt, wchar_t, alloc<wchar_t>, alloc<char>>;
  37
  38 static_assert( std::is_same<wconv::byte_string, Str<char>>::value,
  39                "byte string is std::string" );
  40 static_assert( std::is_same<wconv::wide_string, Str<wchar_t>>::value,
  41                "wide string is std::wstring" );