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

   1 // { dg-do run { target c++11 } }
   2 // { dg-require-effective-target hosted }
   3
   4 // Copyright (C) 2005-2023 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 // 20.6.6.2 Template class shared_ptr [util.smartptr.shared]
  22
  23 #include <memory>
  24 #include <testsuite_hooks.h>
  25
  26 struct A { };
  27 struct B : A { };
  28
  29
  30 // 20.6.6.2.1 shared_ptr constructors [util.smartptr.shared.const]
  31
  32 // Construction from pointer
  33
  34 int
  35 test01()
  36 {
  37   A * const a = 0;
  38   std::shared_ptr<A> p(a);
  39   VERIFY( p.get() == 0 );
  40   VERIFY( p.use_count() == 1 );
  41
  42   return 0;
  43 }
  44
  45 int
  46 test02()
  47 {
  48   A * const a = new A;
  49   std::shared_ptr<A> p(a);
  50   VERIFY( p.get() == a );
  51   VERIFY( p.use_count() == 1 );
  52
  53   return 0;
  54 }
  55
  56
  57 int
  58 test03()
  59 {
  60   B * const b = new B;
  61   std::shared_ptr<A> p(b);
  62   VERIFY( p.get() == b );
  63   VERIFY( p.use_count() == 1 );
  64
  65   return 0;
  66 }
  67
  68 int
  69 main()
  70 {
  71   test01();
  72   test02();
  73   test03();
  74   return 0;
  75 }