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).
7 // See http://www.boost.org/libs/type_traits for most recent version including documentation.
9 #ifndef BOOST_TT_IS_VOID_HPP_INCLUDED
10 #define BOOST_TT_IS_VOID_HPP_INCLUDED
12 #include <boost/type_traits/integral_constant.hpp>
17 struct is_void : public false_type {};
19 template<> struct is_void<void> : public true_type {};
20 template<> struct is_void<const void> : public true_type{};
21 template<> struct is_void<const volatile void> : public true_type{};
22 template<> struct is_void<volatile void> : public true_type{};
26 #endif // BOOST_TT_IS_VOID_HPP_INCLUDED