libstdc++-v3/testsuite/29_atomics/atomic_ref/requirements.cc

   1 // Copyright (C) 2019-2024 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-do compile { target c++20 } }
  19
  20 #include <atomic>
  21
  22 void
  23 test01()
  24 {
  25   struct X { int c; };
  26   using A = std::atomic_ref<X>;
  27   static_assert( std::is_standard_layout_v<A> );
  28   static_assert( std::is_nothrow_copy_constructible_v<A> );
  29   static_assert( std::is_trivially_destructible_v<A> );
  30   static_assert( std::is_same_v<A::value_type, X> );
  31   static_assert( !std::is_copy_assignable_v<A> );
  32   static_assert( !std::is_move_assignable_v<A> );
  33 }
  34
  35 void
  36 test02()
  37 {
  38   using A = std::atomic_ref<int>;
  39   static_assert( std::is_standard_layout_v<A> );
  40   static_assert( std::is_nothrow_copy_constructible_v<A> );
  41   static_assert( std::is_trivially_destructible_v<A> );
  42   static_assert( std::is_same_v<A::value_type, int> );
  43   static_assert( std::is_same_v<A::difference_type, A::value_type> );
  44   static_assert( !std::is_copy_assignable_v<A> );
  45   static_assert( !std::is_move_assignable_v<A> );
  46 }
  47
  48 void
  49 test03()
  50 {
  51   using A = std::atomic_ref<double>;
  52   static_assert( std::is_standard_layout_v<A> );
  53   static_assert( std::is_nothrow_copy_constructible_v<A> );
  54   static_assert( std::is_trivially_destructible_v<A> );
  55   static_assert( std::is_same_v<A::value_type, double> );
  56   static_assert( std::is_same_v<A::difference_type, A::value_type> );
  57   static_assert( !std::is_copy_assignable_v<A> );
  58   static_assert( !std::is_move_assignable_v<A> );
  59 }
  60
  61 void
  62 test04()
  63 {
  64   using A = std::atomic_ref<int*>;
  65   static_assert( std::is_standard_layout_v<A> );
  66   static_assert( std::is_nothrow_copy_constructible_v<A> );
  67   static_assert( std::is_trivially_destructible_v<A> );
  68   static_assert( std::is_same_v<A::value_type, int*> );
  69   static_assert( std::is_same_v<A::difference_type, std::ptrdiff_t> );
  70   static_assert( std::is_nothrow_copy_constructible_v<A> );
  71   static_assert( !std::is_copy_assignable_v<A> );
  72   static_assert( !std::is_move_assignable_v<A> );
  73 }