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 | |