libstdc++-v3/testsuite/20_util/shared_ptr/creation/single_allocation.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-do run { target c++11 } }
  19
  20 #include <memory>
  21 #include <testsuite_hooks.h>
  22
  23 int counter = 0;
  24
  25 template<typename T>
  26 struct Alloc : std::allocator<T>
  27 {
  28   template<typename U>
  29     struct rebind { using other = Alloc<U>; };
  30
  31   Alloc() = default;
  32
  33   template<typename U>
  34     Alloc(const Alloc<U>&) { }
  35
  36   T* allocate(std::size_t n)
  37   {
  38     ++counter;
  39     return std::allocator<T>::allocate(n);
  40   }
  41 };
  42
  43
  44 void
  45 test01()
  46 {
  47   std::allocate_shared<int>(Alloc<int>());
  48   VERIFY( counter == 1 );
  49 }
  50
  51 int
  52 main()
  53 {
  54   test01();
  55 }