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// Copyright (C) 2020 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/>.
// { dg-options "-std=gnu++2a" }
// { dg-do run { target c++2a } }
#include <queue>
#include <testsuite_hooks.h>
void
test01()
{
std::queue<int> c1{ {1, 2, 3} }, c2{ {1, 2, 3, 4} }, c3{ {1, 2, 4} };
VERIFY( c1 == c1 );
VERIFY( std::is_eq(c1 <=> c1) );
VERIFY( c1 < c2 );
VERIFY( std::is_lt(c1 <=> c2) );
VERIFY( c1 < c3 );
VERIFY( std::is_lt(c1 <=> c3) );
VERIFY( c2 < c3 );
VERIFY( std::is_lt(c2 <=> c3) );
static_assert( std::totally_ordered<std::queue<int>> );
static_assert( std::three_way_comparable<std::queue<int>,
std::strong_ordering> );
static_assert( ! std::three_way_comparable<std::queue<float>,
std::strong_ordering> );
static_assert( ! std::three_way_comparable<std::queue<float>,
std::weak_ordering> );
static_assert( std::three_way_comparable<std::queue<float>,
std::partial_ordering> );
struct E
{
bool operator==(E) { return true; }
};
static_assert( ! std::three_way_comparable<E> );
static_assert( ! std::three_way_comparable<std::queue<E>> );
}
int
main()
{
test01();
}
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