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// { dg-options "-std=gnu++11" }
// { dg-do compile }
// 2009-11-12 Paolo Carlini <paolo.carlini@oracle.com>
//
// Copyright (C) 2009-2016 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 <type_traits>
// DR 1255.
void test01()
{
using std::common_type;
using std::is_same;
static_assert( is_same<common_type<void>::type, void>(),
"common_type<void>" );
static_assert( is_same<common_type<const void>::type, void>(),
"common_type<const void>" );
static_assert( is_same<common_type<volatile void>::type, void>(),
"common_type<volatile void>" );
static_assert( is_same<common_type<const volatile void>::type, void>(),
"common_type<const volatile void>" );
static_assert( is_same<common_type<void, void>::type, void>(),
"common_type<void, void>" );
static_assert( is_same<common_type<void, const void>::type, void>(),
"common_type<void, const void>" );
static_assert( is_same<common_type<void, volatile void>::type, void>(),
"common_type<void, volatile void>" );
static_assert( is_same<common_type<void, const volatile void>::type, void>(),
"common_type<void, const volatile void>" );
static_assert( is_same<common_type<const void, void>::type, void>(),
"common_type<const void, void>" );
static_assert( is_same<common_type<const void, const void>::type, void>(),
"common_type<const void, const void>" );
static_assert( is_same<common_type<const void, volatile void>::type, void>(),
"common_type<const void, volatile void>" );
static_assert( is_same<common_type<const void, const volatile void>::type,
void>(), "common_type<const void, const volatile void>" );
static_assert( is_same<common_type<volatile void, void>::type, void>(),
"common_type<volatile void, void>" );
static_assert( is_same<common_type<volatile void, volatile void>::type,
void>(), "common_type<volatile void, volatile void>" );
static_assert( is_same<common_type<volatile void, const void>::type,
void>(), "common_type<volatile void, const void>" );
static_assert( is_same<common_type<volatile void, const volatile void>::type,
void>(), "common_type<volatile void, const volatile void>" );
static_assert( is_same<common_type<const volatile void, void>::type, void>(),
"common_type<const volatile void, const volatile void>" );
static_assert( is_same<common_type<const volatile void, const void>::type,
void>(), "common_type<const volatile void, const void>" );
static_assert( is_same<common_type<const volatile void, volatile void>::type,
void>(), "common_type<const volatile void, volatile void>" );
static_assert( is_same<common_type<const volatile void, const volatile void>::type,
void>(),
"common_type<const volatile void, const volatile void>" );
}
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