libstdc++-v3/testsuite/20_util/shared_ptr/assign/move.cc

   1 // { dg-options "-std=gnu++0x" }
   2
   3 // Copyright (C) 2007 Free Software Foundation
   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 2, 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 COPYING.  If not, write to the Free
  18 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  19 // USA.
  20
  21 // 20.6.6.2 Template class shared_ptr [util.smartptr.shared]
  22
  23 #include <memory>
  24 #include <utility>
  25 #include <testsuite_hooks.h>
  26
  27 struct A
  28 {
  29   A() { ++ctor_count; }
  30   virtual ~A() { ++dtor_count; }
  31   static long ctor_count;
  32   static long dtor_count;
  33 };
  34 long A::ctor_count = 0;
  35 long A::dtor_count = 0;
  36
  37 struct B : A
  38 {
  39   B() { ++ctor_count; }
  40   virtual ~B() { ++dtor_count; }
  41   static long ctor_count;
  42   static long dtor_count;
  43 };
  44 long B::ctor_count = 0;
  45 long B::dtor_count = 0;
  46
  47 struct reset_count_struct
  48 {
  49   ~reset_count_struct()
  50   {
  51     A::ctor_count = 0;
  52     A::dtor_count = 0;
  53     B::ctor_count = 0;
  54     B::dtor_count = 0;
  55   }
  56 };
  57
  58
  59 // 20.6.6.2.1 shared_ptr constructors [util.smartptr.shared.const]
  60
  61 // Rvalue assignment from shared_ptr
  62 void
  63 test01()
  64 {
  65   reset_count_struct __attribute__((unused)) reset;
  66   bool test __attribute__((unused)) = true;
  67
  68   std::shared_ptr<A> a1;
  69   std::shared_ptr<A> a2(new A);
  70
  71   a1 = std::move(a2);
  72   VERIFY( a1.get() != 0 );
  73   VERIFY( a2.get() == 0 );
  74   VERIFY( a1.use_count() == 1 );
  75   VERIFY( a2.use_count() == 0 );
  76   VERIFY( A::ctor_count == 1 );
  77   VERIFY( A::dtor_count == 0 );
  78
  79   a1 = std::move(std::shared_ptr<A>());
  80   VERIFY( a1.get() == 0 );
  81   VERIFY( A::ctor_count == 1 );
  82   VERIFY( A::dtor_count == 1 );
  83 }
  84
  85 // Rvalue assignment from shared_ptr<Y>
  86 void
  87 test02()
  88 {
  89   reset_count_struct __attribute__((unused)) reset;
  90   bool test __attribute__((unused)) = true;
  91
  92   std::shared_ptr<A> a;
  93   std::shared_ptr<B> b(new B);
  94
  95   a = std::move(b);
  96   VERIFY( a.get() != 0 );
  97   VERIFY( b.get() == 0 );
  98   VERIFY( a.use_count() == 1 );
  99   VERIFY( b.use_count() == 0 );
 100   VERIFY( A::ctor_count == 1 );
 101   VERIFY( A::dtor_count == 0 );
 102   VERIFY( B::ctor_count == 1 );
 103   VERIFY( B::dtor_count == 0 );
 104
 105   a = std::move(std::shared_ptr<A>());
 106   VERIFY( a.get() == 0 );
 107   VERIFY( A::ctor_count == 1 );
 108   VERIFY( A::dtor_count == 1 );
 109   VERIFY( B::ctor_count == 1 );
 110   VERIFY( B::dtor_count == 1 );
 111 }
 112
 113 int
 114 main()
 115 {
 116   test01();
 117   test02();
 118   return 0;
 119 }