libstdc++-v3/testsuite/20_util/allocator_traits/requirements/typedefs2.cc

   1 // { dg-do compile { target c++11 } }
   2 //
   3 // Copyright (C) 2013-2021 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 <memory>
  21 #include <testsuite_allocator.h>
  22
  23 template<typename T>
  24 struct ptr
  25 {
  26   ptr() = default;
  27   template<typename U>
  28     ptr(ptr<U> const& p) { }
  29 };
  30
  31 // This doesn't meet the allocator requirements, it's only to check
  32 // that allocator_traits finds the right nested types.
  33 template<typename T>
  34 struct alloc
  35 {
  36   typedef T value_type;
  37
  38   typedef ptr<T> pointer;
  39   typedef ptr<const T> const_pointer;
  40   typedef ptr<void> void_pointer;
  41   typedef ptr<const void> const_void_pointer;
  42   typedef int difference_type;
  43   typedef int size_type;
  44
  45   typedef std::false_type propagate_on_container_copy_assignment;
  46   typedef std::false_type propagate_on_container_move_assignment;
  47   typedef std::false_type propagate_on_container_swap;
  48 };
  49
  50 typedef alloc<int> alloc_type;
  51 typedef std::allocator_traits<alloc_type> traits;
  52
  53 using std::is_same;
  54
  55 static_assert( is_same<traits::pointer, alloc_type::pointer>::value,
  56                "pointer" );
  57
  58 static_assert( is_same<traits::const_pointer,
  59                        alloc_type::const_pointer>::value,
  60                "const_pointer" );
  61
  62 static_assert( is_same<traits::void_pointer, alloc_type::void_pointer>::value,
  63                "void_pointer" );
  64
  65 static_assert( is_same<traits::const_void_pointer,
  66                        alloc_type::const_void_pointer>::value,
  67                "const_void_pointer");
  68
  69 static_assert( is_same<traits::difference_type,
  70                        alloc_type::difference_type>::value,
  71                "difference_type" );
  72
  73 static_assert( is_same<traits::size_type, alloc_type::size_type>::value,
  74                "size_type" );
  75
  76 static_assert( is_same<traits::size_type, alloc_type::size_type>::value,
  77                "size_type" );
  78
  79 static_assert( is_same<traits::propagate_on_container_copy_assignment,
  80                        alloc_type::propagate_on_container_copy_assignment
  81                       >::value,
  82                "propagate_on_container_copy_assignment" );
  83
  84 static_assert( is_same<traits::propagate_on_container_move_assignment,
  85                        alloc_type::propagate_on_container_move_assignment
  86                       >::value,
  87                "propagate_on_container_move_assignment" );
  88
  89 static_assert( is_same<traits::propagate_on_container_swap,
  90                        alloc_type::propagate_on_container_swap>::value,
  91                "propagate_on_container_swap" );