libstdc++-v3/testsuite/23_containers/array/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 <array>
  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             constexpr _Ttesttype a = { };
  37             constexpr auto v1 __attribute__((unused)) = a.size();
  38             constexpr auto v2 __attribute__((unused)) = a.max_size();
  39             constexpr auto v3 __attribute__((unused)) = a.empty();
  40           }
  41         };
  42
  43         _Concept c;
  44         c.__constraint();
  45       }
  46   };
  47 }
  48
  49 int main()
  50 {
  51   __gnu_test::constexpr_member_functions test;
  52   test.operator()<std::array<long, 60>>();
  53   return 0;
  54 }