libstdc++-v3/testsuite/experimental/memory/shared_ptr/modifiers/reset.cc

   1 // { dg-do run { target c++14 } }
   2
   3 // Copyright (C) 2015-2018 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 // 8.2.1 Class template shared_ptr [memory.smartptr.shared]
  21
  22 #include <experimental/memory>
  23 #include <testsuite_hooks.h>
  24
  25 struct A { };
  26 struct D
  27 {
  28   void operator()(A* p) { delete [] p; ++delete_count; }
  29   static long delete_count;
  30 };
  31 long D::delete_count = 0;
  32
  33 // C++14 §20.8.2.2.4
  34
  35 // reset
  36 int
  37 test01()
  38 {
  39   A * const a = new A[5];
  40   std::experimental::shared_ptr<A[5]> p1(a);
  41   std::experimental::shared_ptr<A[5]> p2(p1);
  42   p1.reset();
  43   VERIFY( p1.get() == 0 );
  44   VERIFY( p2.get() == a );
  45
  46   return 0;
  47 }
  48
  49 int
  50 test02()
  51 {
  52   A * const a = new A[5];
  53   A * const b = new A[5];
  54   std::experimental::shared_ptr<A[5]> p1(a);
  55   std::experimental::shared_ptr<A[5]> p2(p1);
  56   p1.reset(b);
  57   VERIFY( p1.get() == b );
  58   VERIFY( p2.get() == a );
  59
  60   return 0;
  61 }
  62
  63 int
  64 test03()
  65 {
  66   {
  67     std::experimental::shared_ptr<A[5]> p1;
  68     p1.reset(new A[5], D());
  69   }
  70   VERIFY( D::delete_count == 1 );
  71
  72   return 0;
  73 }
  74
  75 int
  76 main()
  77 {
  78   test01();
  79   test02();
  80   test03();
  81   return 0;
  82 }