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

   1 // { dg-options "-std=gnu++0x" }
   2
   3 // Copyright (C) 2005, 2006, 2007 Free Software Foundation
   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 2, 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 COPYING.  If not, write to the Free
  18 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  19 // USA.
  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 test03()
  81 {
  82   std::shared_ptr<A> p1;
  83
  84   // check other operators are defined
  85   VERIFY( p1 <= p1 );
  86   VERIFY( p1 >= p1 );
  87   VERIFY( !(p1 > p1) );
  88
  89   return 0;
  90 }
  91
  92 int
  93 main()
  94 {
  95   test01();
  96   test02();
  97   test03();
  98   return 0;
  99 }