libstdc++-v3/testsuite/29_atomics/atomic/requirements/typedefs.cc

   1 // Copyright (C) 2017-2020 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // { dg-options "-std=gnu++17" }
  19 // { dg-do compile { target c++17 } }
  20 // { dg-require-atomic-builtins "" }
  21
  22 #include <atomic>
  23
  24 template<typename T>
  25 constexpr bool check()
  26 {
  27   typename std::atomic<T>::value_type* pv = (T*)nullptr;
  28   typename std::atomic<T>::difference_type* pd = (std::ptrdiff_t*)nullptr;
  29   return true;
  30 }
  31
  32 static_assert( check<int*>(), "" );
  33 static_assert( check<void*>(), "" );
  34 static_assert( check<void(*)()>(), "" );
  35 struct X { };
  36 static_assert( check<X*>(), "" );