libstdc++-v3/testsuite/20_util/shared_ptr/creation/private.cc

   1 // { dg-options "-std=gnu++0x" }
   2
   3 // Copyright (C) 2011-2014 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 <new>
  22
  23 // The behaviour tested here relies on the resolution of LWG issue 2070
  24
  25 template<typename T> struct MyAlloc;
  26
  27 class Private
  28 {
  29   Private() = default;
  30   Private(const Private&) = default;
  31   ~Private() = default;
  32
  33   friend class MyAlloc<Private>;
  34
  35 public:
  36   int get() const { return 0; }
  37 };
  38
  39 template<typename T>
  40 struct MyAlloc : std::allocator<Private>
  41 {
  42   void construct(T* p) { ::new((void*)p) T(); }
  43   void destroy(T* p) { p->~T(); }
  44 };
  45
  46 int main()
  47 {
  48   MyAlloc<Private> a;
  49   auto p = std::allocate_shared<Private>(a);
  50   return p->get();
  51 }
  52