libstdc++-v3/testsuite/23_containers/array/capacity/constexpr_functions.cc

   1 // { dg-do compile { target c++11 } }
   2
   3 // Copyright (C) 2010-2023 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 <array>
  21
  22 namespace __gnu_test
  23 {
  24   struct constexpr_member_functions
  25   {
  26     template<typename _Ttesttype>
  27       void
  28       operator()()
  29       {
  30         struct _Concept
  31         {
  32           void __constraint()
  33           {
  34             constexpr _Ttesttype a = { };
  35             constexpr auto v1 __attribute__((unused)) = a.size();
  36             constexpr auto v2 __attribute__((unused)) = a.max_size();
  37             constexpr auto v3 __attribute__((unused)) = a.empty();
  38           }
  39         };
  40
  41         _Concept c;
  42         c.__constraint();
  43       }
  44   };
  45 }
  46
  47 int main()
  48 {
  49   __gnu_test::constexpr_member_functions test;
  50   test.operator()<std::array<long, 60>>();
  51   return 0;
  52 }