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

   1 // { dg-options "-std=gnu++0x" }
   2
   3 // Copyright (C) 2008 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 // 20.6.11 Template class unique_ptr [unique.ptr]
  22
  23 #include <memory>
  24 #include <testsuite_hooks.h>
  25
  26 struct A
  27 {
  28   A() { ++ctor_count; }
  29   virtual ~A() { ++dtor_count; }
  30   static long ctor_count;
  31   static long dtor_count;
  32 };
  33 long A::ctor_count = 0;
  34 long A::dtor_count = 0;
  35
  36 struct B : A
  37 {
  38   B() { ++ctor_count; }
  39   virtual ~B() { ++dtor_count; }
  40   static long ctor_count;
  41   static long dtor_count;
  42 };
  43 long B::ctor_count = 0;
  44 long B::dtor_count = 0;
  45
  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 // 20.6.11.2.1 unique_ptr constructors [unique.ptr.single.ctor]
  59
  60 // Construction from pointer
  61 void
  62 test01()
  63 {
  64   reset_count_struct __attribute__((unused)) reset;
  65   bool test __attribute__((unused)) = true;
  66
  67   std::unique_ptr<A> A_default;
  68   VERIFY( A_default.get() == 0 );
  69   VERIFY( A::ctor_count == 0 );
  70   VERIFY( A::dtor_count == 0 );
  71   VERIFY( B::ctor_count == 0 );
  72   VERIFY( B::dtor_count == 0 );
  73
  74   std::unique_ptr<A> A_from_A(new A);
  75   VERIFY( A_from_A.get() != 0 );
  76   VERIFY( A::ctor_count == 1 );
  77   VERIFY( A::dtor_count == 0 );
  78   VERIFY( B::ctor_count == 0 );
  79   VERIFY( B::dtor_count == 0 );
  80
  81   std::unique_ptr<A> A_from_B(new B);
  82   VERIFY( A_from_B.get() != 0 );
  83   VERIFY( A::ctor_count == 2 );
  84   VERIFY( A::dtor_count == 0 );
  85   VERIFY( B::ctor_count == 1 );
  86   VERIFY( B::dtor_count == 0 );
  87 }
  88
  89 void
  90 test02()
  91 {
  92   reset_count_struct __attribute__((unused)) reset;
  93   bool test __attribute__((unused)) = true;
  94
  95   A * const A_default = 0;
  96   std::unique_ptr<A> p1(A_default);
  97   VERIFY( p1.get() == 0 );
  98   VERIFY( A::ctor_count == 0 );
  99   VERIFY( A::dtor_count == 0 );
 100   VERIFY( B::ctor_count == 0 );
 101   VERIFY( B::dtor_count == 0 );
 102
 103   A * const A_from_A = new A;
 104   std::unique_ptr<A> p2(A_from_A);
 105   VERIFY( p2.get() == A_from_A );
 106   VERIFY( A::ctor_count == 1 );
 107   VERIFY( A::dtor_count == 0 );
 108   VERIFY( B::ctor_count == 0 );
 109   VERIFY( B::dtor_count == 0 );
 110 }
 111
 112 int
 113 main()
 114 {
 115   test01();
 116   test02();
 117   return 0;
 118 }