libstdc++-v3/testsuite/experimental/string_view/requirements/typedefs.cc

   1 // { dg-do compile { target c++14 } }
   2
   3 // Copyright (C) 2013-2024 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 #include <experimental/string_view>
  21 #include <testsuite_containers.h>
  22
  23 namespace __gnu_test
  24 {
  25   template<typename _Tp1, typename _Tp2>
  26     struct traits<std::experimental::basic_string_view<_Tp1, _Tp2>> : public traits_base
  27     {
  28       typedef std::true_type    is_container;
  29       typedef std::true_type    is_reversible;
  30     };
  31 }
  32
  33 #include <testsuite_containers.h>
  34
  35 // Check container for required typedefs.
  36
  37 __gnu_test::basic_types<std::experimental::string_view> t1b;
  38 __gnu_test::reversible_types<std::experimental::string_view> t1r;
  39 typedef typename std::experimental::string_view::traits_type traits_type1;
  40
  41 __gnu_test::basic_types<std::experimental::wstring_view> t2b;
  42 __gnu_test::reversible_types<std::experimental::wstring_view> t2r;
  43 typedef typename std::experimental::wstring_view::traits_type traits_type2;
  44
  45 static_assert(
  46     std::is_same<std::experimental::string_view::pointer, char*>(),
  47     "pointer should be value_type*");
  48 static_assert(
  49     std::is_same<std::experimental::string_view::const_pointer, const char*>(),
  50     "const_pointer should be const value_type*");
  51 static_assert(
  52     std::is_same<std::experimental::string_view::reference, char&>(),
  53     "reference should be value_type&");
  54 static_assert(
  55     std::is_same<std::experimental::string_view::const_reference, const char&>(),
  56     "const_reference should be const value_type&");