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// { dg-do compile { target c++14 } }
// Copyright (C) 2013-2018 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
#include <experimental/optional>
#include <testsuite_hooks.h>
namespace ns
{
struct value_type
{
int i;
const char* s;
};
constexpr bool
strcmp(const char* lhs, const char* rhs)
{
return *lhs == *rhs && (!*lhs || strcmp(lhs + 1, rhs + 1));
}
constexpr bool
strrel(const char* lhs, const char* rhs)
{
return (*rhs && (!*lhs || (*lhs < *rhs)))
|| ((*lhs && *rhs && !(*rhs < *lhs)) && strrel(lhs + 1, rhs + 1));
}
constexpr bool
operator==(value_type const& lhs, value_type const& rhs)
{ return (lhs.i == rhs.i) && strcmp(lhs.s, rhs.s); }
constexpr bool
operator!=(value_type const& lhs, value_type const& rhs)
{ return !(lhs == rhs); }
constexpr bool
operator<(value_type const& lhs, value_type const& rhs)
{ return (lhs.i < rhs.i) || (!(rhs.i < lhs.i) && strrel(lhs.s, rhs.s)); }
} // namespace ns
int main()
{
using ns::value_type;
using O = std::experimental::optional<value_type>;
using std::experimental::nullopt;
{
constexpr O o;
static_assert( !(o < nullopt), "" );
static_assert( !(nullopt < o), "" );
static_assert( !(o > nullopt), "" );
static_assert( !(nullopt > o), "" );
static_assert( o <= nullopt, "" );
static_assert( nullopt <= o, "" );
static_assert( o >= nullopt, "" );
static_assert( nullopt >= o, "" );
}
{
constexpr O o { std::experimental::in_place };
static_assert( !(o < nullopt), "" );
static_assert( nullopt < o, "" );
static_assert( o > nullopt, "" );
static_assert( !(nullopt > o), "" );
static_assert( !(o <= nullopt), "" );
static_assert( nullopt <= o, "" );
static_assert( o >= nullopt, "" );
static_assert( !(nullopt >= o), "" );
}
}
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