libstdc++-v3/testsuite/21_strings/char_traits/requirements/constexpr_functions.cc

   1 // { dg-do compile }
   2 // { dg-options "-std=gnu++0x" }
   3
   4 // Copyright (C) 2010 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 #include <string>
  22 #include <testsuite_common_types.h>
  23
  24 namespace __gnu_test
  25 {
  26   struct constexpr_member_functions
  27   {
  28     template<typename _Ttesttype>
  29       void
  30       operator()()
  31       {
  32         struct _Concept
  33         {
  34           void __constraint()
  35           {
  36             typedef typename _Ttesttype::char_type char_type;
  37             typedef typename _Ttesttype::int_type int_type;
  38             const char_type c1(0);
  39             const char_type c2 = c1;
  40             const int_type i(0);
  41             constexpr auto v1 __attribute__((unused))
  42               = _Ttesttype::eq(c1, c2);
  43             constexpr auto v2 __attribute__((unused))
  44               = _Ttesttype::lt(c1, c2);
  45             constexpr auto v3 __attribute__((unused))
  46               = _Ttesttype::to_char_type(i);
  47             constexpr auto v4 __attribute__((unused))
  48               = _Ttesttype::to_int_type(c1);
  49             constexpr auto v5 __attribute__((unused))
  50               = _Ttesttype::eq_int_type(i, i);
  51             constexpr auto v6 __attribute__((unused))
  52               = _Ttesttype::eof();
  53             constexpr auto v7 __attribute__((unused))
  54               = _Ttesttype::not_eof(i);
  55           }
  56         };
  57
  58         _Concept c;
  59         c.__constraint();
  60       }
  61   };
  62 }
  63
  64 int main()
  65 {
  66   __gnu_test::constexpr_member_functions test;
  67   test.operator()<std::char_traits<char>>();
  68 #ifdef _GLIBCXX_USE_WCHAR_T
  69   test.operator()<std::char_traits<wchar_t>>();
  70 #endif
  71   test.operator()<std::char_traits<char16_t>>();
  72   test.operator()<std::char_traits<char32_t>>();
  73   return 0;
  74 }