libstdc++-v3/testsuite/20_util/shared_ptr/observers/bool_conv.cc

   1 // { dg-options "-std=gnu++0x" }
   2
   3 // Copyright (C) 2005-2013 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 // 20.6.6.2 Template class shared_ptr [util.smartptr.shared]
  21
  22 #include <memory>
  23 #include <testsuite_hooks.h>
  24
  25 struct A { };
  26
  27 // 20.6.6.2.5 shared_ptr observers [util.smartptr.shared.obs]
  28
  29 // conversion to bool
  30 void
  31 test01()
  32 {
  33   bool test __attribute__((unused)) = true;
  34
  35   const std::shared_ptr<A> p1;
  36   VERIFY( static_cast<bool>(p1) == false );
  37   const std::shared_ptr<A> p2(p1);
  38   VERIFY( static_cast<bool>(p2) == false );
  39 }
  40
  41 void
  42 test02()
  43 {
  44   bool test __attribute__((unused)) = true;
  45
  46   std::shared_ptr<A> p1(new A);
  47   VERIFY( static_cast<bool>(p1) );
  48   std::shared_ptr<A> p2(p1);
  49   VERIFY( static_cast<bool>(p2) );
  50   p1.reset();
  51   VERIFY( !static_cast<bool>(p1) );
  52   VERIFY( static_cast<bool>(p2) );
  53 }
  54
  55 void
  56 test03()
  57 {
  58   bool test __attribute__((unused)) = true;
  59
  60   std::shared_ptr<A> p1(new A);
  61   std::shared_ptr<A> p2(p1);
  62   p2.reset(new A);
  63   VERIFY( static_cast<bool>(p1) );
  64   VERIFY( static_cast<bool>(p2) );
  65 }
  66
  67
  68 int
  69 main()
  70 {
  71   test01();
  72   test02();
  73   test03();
  74   return 0;
  75 }