1
2// (C) Copyright Steve Cleary, Beman Dawes, Howard Hinnant & John Maddock 2000.
3// Use, modification and distribution are subject to the Boost Software License,
4// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
5// http://www.boost.org/LICENSE_1_0.txt).
6//
7// See http://www.boost.org/libs/type_traits for most recent version including documentation.
8
9#ifndef BOOST_TT_IS_VOID_HPP_INCLUDED
10#define BOOST_TT_IS_VOID_HPP_INCLUDED
11
12#include <boost/type_traits/integral_constant.hpp>
13
14namespace boost {
15
16template <class T>
17struct is_void : public false_type {};
18
19template<> struct is_void<void> : public true_type {};
20template<> struct is_void<const void> : public true_type{};
21template<> struct is_void<const volatile void> : public true_type{};
22template<> struct is_void<volatile void> : public true_type{};
23
24} // namespace boost
25
26#endif // BOOST_TT_IS_VOID_HPP_INCLUDED
27