libstdc++-v3/testsuite/experimental/memory/observer_ptr/relops/relops.cc

   1 // { dg-do run { target c++14 } }
   2
   3 // Copyright (C) 2015-2022 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 #include <experimental/memory>
  21 #include <testsuite_hooks.h>
  22
  23 using std::experimental::observer_ptr;
  24
  25 void test01()
  26 {
  27   observer_ptr<int> a, b;
  28   VERIFY(a == b);
  29 }
  30
  31 void test02()
  32 {
  33   int x[2]{};
  34   observer_ptr<int> a{&x[0]};
  35   observer_ptr<int> b{&x[1]};
  36   VERIFY(a != b);
  37   VERIFY(a < b);
  38   VERIFY(a <= b);
  39   VERIFY(b >= a);
  40   VERIFY(b > a);
  41 }
  42
  43 void test03()
  44 {
  45   int x{};
  46   observer_ptr<int> a{&x};
  47   observer_ptr<int> b{&x};
  48   VERIFY(a == b);
  49 }
  50
  51 void test04()
  52 {
  53   static constexpr int x[2]{};
  54   constexpr observer_ptr<const int> a{&x[0]};
  55   constexpr observer_ptr<const int> b{&x[1]};
  56   VERIFY(a != b);
  57   VERIFY(a < b);
  58   VERIFY(a <= b);
  59   VERIFY(b >= a);
  60   VERIFY(b > a);
  61 }
  62
  63 void test05()
  64 {
  65   static constexpr int x{};
  66   constexpr observer_ptr<const int> a{&x};
  67   constexpr observer_ptr<const int> b{&x};
  68   VERIFY(a == b);
  69 }
  70
  71
  72 int main()
  73 {
  74   test01();
  75   test02();
  76   test03();
  77   test04();
  78   test05();
  79 }