is_void.hpp

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//  (C) Copyright Steve Cleary, Beman Dawes, Howard Hinnant & John Maddock 2000.
//  Use, modification and distribution are subject to the Boost Software License,
//  Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
//  http://www.boost.org/LICENSE_1_0.txt).
//
//  See http://www.boost.org/libs/type_traits for most recent version including documentation.

#ifndef BOOST_TT_IS_VOID_HPP_INCLUDED
#define BOOST_TT_IS_VOID_HPP_INCLUDED

#include <boost/type_traits/integral_constant.hpp>

namespace boost {

template <class T>
struct is_void : public false_type {};

template<> struct is_void<void> : public true_type {};
template<> struct is_void<const void> : public true_type{};
template<> struct is_void<const volatile void> : public true_type{};
template<> struct is_void<volatile void> : public true_type{};

} // namespace boost

#endif // BOOST_TT_IS_VOID_HPP_INCLUDED