libstdc++-v3/testsuite/experimental/memory/shared_ptr/observers/owner_before.cc

   1 // { dg-do run { target c++14 } }
   2
   3 // Copyright (C) 2015-2016 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 // 8.2.1 Class template shared_ptr [memory.smartptr.shared]
  21
  22 #include <experimental/memory>
  23 #include <testsuite_hooks.h>
  24
  25 struct A
  26 {
  27   int i;
  28   virtual ~A() { }
  29 };
  30
  31 struct B : A { };
  32
  33 // 8.2.1.2 shared_ptr observers [memory.smartptr.shared.obs]
  34
  35 // owner_before
  36 void
  37 test01()
  38 {
  39   bool test __attribute__((unused)) = true;
  40
  41   // test empty shared_ptrs compare equivalent
  42   std::experimental::shared_ptr<A[5]> p1;
  43   std::experimental::shared_ptr<B[5]> p2;
  44   VERIFY( !p1.owner_before(p2) && !p2.owner_before(p1) );
  45 }
  46
  47 void
  48 test02()
  49 {
  50   bool test __attribute__((unused)) = true;
  51
  52   std::experimental::shared_ptr<A[5]> a0;
  53
  54   std::experimental::shared_ptr<A[5]> a1(new A[5]);
  55   VERIFY( a1.owner_before(a0) || a0.owner_before(a1) );
  56   VERIFY( !(a1.owner_before(a0) && a0.owner_before(a1)) );
  57
  58   std::experimental::shared_ptr<B[5]> b1(new B[5]);
  59   VERIFY( a1.owner_before(b1) || b1.owner_before(a1) );
  60   VERIFY( !(a1.owner_before(b1) && b1.owner_before(a1)) );
  61
  62   std::experimental::shared_ptr<A[5]> a2(a1);
  63   VERIFY( !a1.owner_before(a2) && !a2.owner_before(a1) );
  64
  65   std::experimental::weak_ptr<A[5]> w1(a1);
  66   VERIFY( !a1.owner_before(w1) && !w1.owner_before(a1) );
  67 }
  68
  69 void
  70 test03()
  71 {
  72   bool test __attribute__((unused)) = true;
  73
  74   std::experimental::shared_ptr<A[5]> p1(new A[5]);
  75   std::experimental::shared_ptr<int> p2(p1, &p1[0].i);
  76   VERIFY( !p1.owner_before(p2) && !p2.owner_before(p1) );
  77 }
  78
  79 int
  80 main()
  81 {
  82   test01();
  83   test02();
  84   test03();
  85   return 0;
  86 }