libstdc++-v3/testsuite/20_util/shared_ptr/cons/unique_ptr_deleter.cc

   1 // { dg-do run { target c++11 } }
   2
   3 // Copyright (C) 2008-2019 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 // 20.7.12.2 Template class shared_ptr [util.smartptr.shared]
  21
  22 #include <memory>
  23 #include <testsuite_hooks.h>
  24
  25 struct A { };
  26
  27 struct D {
  28     void operator()(A* p) const { delete p;  ++count; }
  29     static int count;
  30 };
  31
  32 int D::count = 0;
  33
  34 // 20.7.12.2.1 shared_ptr constructors [util.smartptr.shared.const]
  35
  36 // Construction from unique_ptr
  37 void
  38 test01()
  39 {
  40   std::unique_ptr<A, D> up(new A, D());
  41   {
  42       std::shared_ptr<A> sp(std::move(up));
  43       VERIFY( up.get() == 0 );
  44       VERIFY( sp.get() != 0 );
  45       VERIFY( sp.use_count() == 1 );
  46   }
  47   VERIFY( D::count == 1 );
  48 }
  49
  50 void
  51 test02()
  52 {
  53   D::count = 0;
  54   std::unique_ptr<A, D> up;
  55   {
  56     std::shared_ptr<A> sp = std::move(up);
  57   }
  58   VERIFY( D::count == 0 ); // LWG 2415
  59 }
  60
  61 int
  62 main()
  63 {
  64   test01();
  65   test02();
  66   return 0;
  67 }