libstdc++-v3/testsuite/20_util/unique_ptr/cons/pointer.cc

   1 // { dg-do run { target c++11 } }
   2
   3 // Copyright (C) 2008-2016 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 // 20.6.11 Template class unique_ptr [unique.ptr]
  21
  22 #include <memory>
  23 #include <testsuite_hooks.h>
  24
  25 struct A
  26 {
  27   A() { ++ctor_count; }
  28   virtual ~A() { ++dtor_count; }
  29   static long ctor_count;
  30   static long dtor_count;
  31 };
  32 long A::ctor_count = 0;
  33 long A::dtor_count = 0;
  34
  35 struct B : A
  36 {
  37   B() { ++ctor_count; }
  38   virtual ~B() { ++dtor_count; }
  39   static long ctor_count;
  40   static long dtor_count;
  41 };
  42 long B::ctor_count = 0;
  43 long B::dtor_count = 0;
  44
  45
  46 struct reset_count_struct
  47 {
  48   ~reset_count_struct()
  49   {
  50     A::ctor_count = 0;
  51     A::dtor_count = 0;
  52     B::ctor_count = 0;
  53     B::dtor_count = 0;
  54   }
  55 };
  56
  57 // 20.6.11.2.1 unique_ptr constructors [unique.ptr.single.ctor]
  58
  59 // Construction from pointer
  60 void
  61 test01()
  62 {
  63   reset_count_struct __attribute__((unused)) reset;
  64
  65   std::unique_ptr<A> A_default;
  66   VERIFY( A_default.get() == 0 );
  67   VERIFY( A::ctor_count == 0 );
  68   VERIFY( A::dtor_count == 0 );
  69   VERIFY( B::ctor_count == 0 );
  70   VERIFY( B::dtor_count == 0 );
  71
  72   std::unique_ptr<A> A_from_A(new A);
  73   VERIFY( A_from_A.get() != 0 );
  74   VERIFY( A::ctor_count == 1 );
  75   VERIFY( A::dtor_count == 0 );
  76   VERIFY( B::ctor_count == 0 );
  77   VERIFY( B::dtor_count == 0 );
  78
  79   std::unique_ptr<A> A_from_B(new B);
  80   VERIFY( A_from_B.get() != 0 );
  81   VERIFY( A::ctor_count == 2 );
  82   VERIFY( A::dtor_count == 0 );
  83   VERIFY( B::ctor_count == 1 );
  84   VERIFY( B::dtor_count == 0 );
  85 }
  86
  87 void
  88 test02()
  89 {
  90   reset_count_struct __attribute__((unused)) reset;
  91
  92   A * const A_default = 0;
  93   std::unique_ptr<A> p1(A_default);
  94   VERIFY( p1.get() == 0 );
  95   VERIFY( A::ctor_count == 0 );
  96   VERIFY( A::dtor_count == 0 );
  97   VERIFY( B::ctor_count == 0 );
  98   VERIFY( B::dtor_count == 0 );
  99
 100   A * const A_from_A = new A;
 101   std::unique_ptr<A> p2(A_from_A);
 102   VERIFY( p2.get() == A_from_A );
 103   VERIFY( A::ctor_count == 1 );
 104   VERIFY( A::dtor_count == 0 );
 105   VERIFY( B::ctor_count == 0 );
 106   VERIFY( B::dtor_count == 0 );
 107 }
 108
 109 int
 110 main()
 111 {
 112   test01();
 113   test02();
 114   return 0;
 115 }