libstdc++-v3/testsuite/20_util/weak_ptr/observers/owner_before.cc

   1 // { dg-options "-std=gnu++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 // 20.8.13.3 Template class weak_ptr [util.smartptr.weak]
  21
  22 #include <memory>
  23 #include <testsuite_hooks.h>
  24
  25 struct A { };
  26 struct B { };
  27
  28 // 20.6.6.3.5 weak_ptr observers [util.smartptr.weak.obs]
  29
  30 int
  31 test01()
  32 {
  33   bool test __attribute__((unused)) = true;
  34
  35   // test empty weak_ptrs compare equivalent
  36   std::weak_ptr<A> p1;
  37   std::weak_ptr<B> p2;
  38   VERIFY( !p1.owner_before(p2) && !p2.owner_before(p1) );
  39
  40   std::shared_ptr<B> p3;
  41   VERIFY( !p1.owner_before(p3) && !p3.owner_before(p1) );
  42
  43   return 0;
  44 }
  45
  46
  47 int
  48 test02()
  49 {
  50   bool test __attribute__((unused)) = true;
  51
  52   std::shared_ptr<A> a0;
  53   std::weak_ptr<A> w0(a0);
  54
  55   std::shared_ptr<A> a1(new A);
  56   std::weak_ptr<A> w1(a1);
  57   VERIFY( !a1.owner_before(w1) && !w1.owner_before(a1) );
  58
  59   VERIFY( w1.owner_before(w0) || w0.owner_before(w1) );
  60   VERIFY( !(w1.owner_before(w0) && w0.owner_before(w1)) );
  61
  62   VERIFY( w1.owner_before(a0) || a0.owner_before(w1) );
  63   VERIFY( !(w1.owner_before(a0) && a0.owner_before(w1)) );
  64
  65   std::shared_ptr<B> b1(new B);
  66   VERIFY( w1.owner_before(b1) || b1.owner_before(w1) );
  67
  68   return 0;
  69 }
  70
  71 int
  72 main()
  73 {
  74   test01();
  75   test02();
  76   return 0;
  77 }