| 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 | |
| 14 | namespace boost { |
| 15 | |
| 16 | template <class T> |
| 17 | struct is_void : public false_type {}; |
| 18 | |
| 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{}; |
| 23 | |
| 24 | } // namespace boost |
| 25 | |
| 26 | #endif // BOOST_TT_IS_VOID_HPP_INCLUDED |
| 27 |