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// Copyright (C) 2014-2022 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-do compile { target c++11 } }
#include <queue>
using test_type = std::queue<int>;
using container = test_type::container_type;
template<typename A>
using uses_allocator = std::uses_allocator<test_type, A>;
template<typename... Args>
using is_constructible = std::is_constructible<test_type, Args...>;
// test with valid allocator
using alloc_type = container::allocator_type;
static_assert( uses_allocator<alloc_type>::value, "valid allocator" );
static_assert( is_constructible<const alloc_type&>::value,
"queue(const Alloc&)" );
static_assert( is_constructible<const container&, const alloc_type&>::value,
"queue(const container_type&, const Alloc&)" );
static_assert( is_constructible<container&&, const alloc_type&>::value,
"queue(const container_type&, const Alloc&)" );
static_assert( is_constructible<const test_type&, const alloc_type&>::value,
"queue(const queue&, const Alloc&)" );
static_assert( is_constructible<test_type&&, const alloc_type&>::value,
"queue(const queue&, const Alloc&)" );
// test with invalid allocator
struct X { };
static_assert( !uses_allocator<X>::value, "invalid allocator" );
static_assert( !is_constructible<const X&>::value,
"queue(const NonAlloc&)" );
static_assert( !is_constructible<const container&, const X&>::value,
"queue(const container_type&, const NonAlloc&)" );
static_assert( !is_constructible<container&&, const X&>::value,
"queue(const container_type&, const NonAlloc&)" );
static_assert( !is_constructible<const test_type&, const X&>::value,
"queue(const queue&, const NonAlloc&)" );
static_assert( !is_constructible<test_type&&, const X&>::value,
"queue(const queue&, const NonAlloc&)" );
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