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

   1 // { dg-do run { target c++11 } }
   2 // { dg-require-effective-target hosted }
   3
   4 // Copyright (C) 2005-2024 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 {
  28   virtual ~A() { }
  29 };
  30
  31 struct B : A
  32 {
  33 };
  34
  35 // 20.6.6.2.6 shared_ptr comparison [util.smartptr.shared.cmp]
  36
  37 int
  38 test01()
  39 {
  40   // test empty shared_ptrs compare equivalent
  41   std::shared_ptr<A> p1;
  42   std::shared_ptr<B> p2;
  43   VERIFY( p1 == p2 );
  44   VERIFY( !(p1 != p2) );
  45   VERIFY( !(p1 < p2) && !(p2 < p1) );
  46   return 0;
  47 }
  48
  49
  50 // Construction from pointer
  51 int
  52 test02()
  53 {
  54   std::shared_ptr<A> A_default;
  55
  56   std::shared_ptr<A> A_from_A(new A);
  57   VERIFY( A_default != A_from_A );
  58   VERIFY( !(A_default == A_from_A) );
  59   VERIFY( (A_default < A_from_A) || (A_from_A < A_default) );
  60
  61   std::shared_ptr<B> B_from_B(new B);
  62   VERIFY( B_from_B != A_from_A );
  63   VERIFY( !(B_from_B == A_from_A) );
  64   VERIFY( (B_from_B < A_from_A) || (A_from_A < B_from_B) );
  65
  66   A_from_A.reset();
  67   VERIFY( A_default == A_from_A );
  68   VERIFY( !(A_default != A_from_A) );
  69   VERIFY( !(A_default < A_from_A) && !(A_from_A < A_default) );
  70
  71   B_from_B.reset();
  72   VERIFY( B_from_B == A_from_A );
  73   VERIFY( !(B_from_B != A_from_A) );
  74   VERIFY( !(B_from_B < A_from_A) && !(A_from_A < B_from_B) );
  75
  76   return 0;
  77 }
  78
  79 int
  80 main()
  81 {
  82   test01();
  83   test02();
  84   return 0;
  85 }