libstdc++-v3/testsuite/20_util/optional/relops/3.cc

   1 // { dg-options "-std=gnu++17" }
   2 // { dg-do run { target c++17 }  }
   3
   4 // Copyright (C) 2013-2020 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 #include <optional>
  22 #include <testsuite_hooks.h>
  23
  24 #include <tuple>
  25 #include <string>
  26
  27 namespace ns
  28 {
  29   struct value_type
  30   {
  31     int i;
  32     std::string s;
  33   };
  34
  35   bool
  36   operator==(value_type const& lhs, value_type const& rhs)
  37   { return std::tie(lhs.i, lhs.s) == std::tie(rhs.i, rhs.s); }
  38
  39   bool
  40   operator!=(value_type const& lhs, value_type const& rhs)
  41   { return std::tie(lhs.i, lhs.s) != std::tie(rhs.i, rhs.s); }
  42
  43   bool
  44   operator<(value_type const& lhs, value_type const& rhs)
  45   { return std::tie(lhs.i, lhs.s) < std::tie(rhs.i, rhs.s); }
  46
  47   bool
  48   operator>(value_type const& lhs, value_type const& rhs)
  49   { return std::tie(lhs.i, lhs.s) > std::tie(rhs.i, rhs.s); }
  50
  51   bool
  52   operator<=(value_type const& lhs, value_type const& rhs)
  53   { return std::tie(lhs.i, lhs.s) <= std::tie(rhs.i, rhs.s); }
  54
  55   bool
  56   operator>=(value_type const& lhs, value_type const& rhs)
  57   { return std::tie(lhs.i, lhs.s) >= std::tie(rhs.i, rhs.s); }
  58
  59 } // namespace ns
  60
  61 int main()
  62 {
  63   using ns::value_type;
  64   using O = std::optional<value_type>;
  65
  66   value_type const reference { 42, "forty-two" };
  67
  68   {
  69     O o;
  70     VERIFY( !(o == reference) );
  71     VERIFY( !(reference == o) );
  72     VERIFY( o != reference );
  73     VERIFY( reference != o );
  74   }
  75
  76   {
  77     O o { value_type { 11, "eleventy" } };
  78     VERIFY( !(o == reference) );
  79     VERIFY( !(reference == o) );
  80     VERIFY( o != reference );
  81     VERIFY( reference != o );
  82   }
  83
  84   {
  85     O o { value_type { 42, "forty-two" } };
  86     VERIFY( o == reference );
  87     VERIFY( reference == o );
  88     VERIFY( !(o != reference) );
  89     VERIFY( !(reference != o) );
  90   }
  91 }