libstdc++-v3/testsuite/20_util/shared_ptr/comparison/cmp.cc

   1 // { dg-do run { target c++11 } }
   2
   3 // Copyright (C) 2005-2019 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   virtual ~A() { }
  28 };
  29
  30 struct B : A
  31 {
  32 };
  33
  34 // 20.6.6.2.6 shared_ptr comparison [util.smartptr.shared.cmp]
  35
  36 int
  37 test01()
  38 {
  39   // test empty shared_ptrs compare equivalent
  40   std::shared_ptr<A> p1;
  41   std::shared_ptr<B> p2;
  42   VERIFY( p1 == p2 );
  43   VERIFY( !(p1 != p2) );
  44   VERIFY( !(p1 < p2) && !(p2 < p1) );
  45   return 0;
  46 }
  47
  48
  49 // Construction from pointer
  50 int
  51 test02()
  52 {
  53   std::shared_ptr<A> A_default;
  54
  55   std::shared_ptr<A> A_from_A(new A);
  56   VERIFY( A_default != A_from_A );
  57   VERIFY( !(A_default == A_from_A) );
  58   VERIFY( (A_default < A_from_A) || (A_from_A < A_default) );
  59
  60   std::shared_ptr<B> B_from_B(new B);
  61   VERIFY( B_from_B != A_from_A );
  62   VERIFY( !(B_from_B == A_from_A) );
  63   VERIFY( (B_from_B < A_from_A) || (A_from_A < B_from_B) );
  64
  65   A_from_A.reset();
  66   VERIFY( A_default == A_from_A );
  67   VERIFY( !(A_default != A_from_A) );
  68   VERIFY( !(A_default < A_from_A) && !(A_from_A < A_default) );
  69
  70   B_from_B.reset();
  71   VERIFY( B_from_B == A_from_A );
  72   VERIFY( !(B_from_B != A_from_A) );
  73   VERIFY( !(B_from_B < A_from_A) && !(A_from_A < B_from_B) );
  74
  75   return 0;
  76 }
  77
  78 int
  79 main()
  80 {
  81   test01();
  82   test02();
  83   return 0;
  84 }