| // (C) Copyright John Maddock 2005. |
| // 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) |
| |
| #ifndef BOOST_TYPE_TRAITS_INTEGRAL_CONSTANT_HPP |
| #define BOOST_TYPE_TRAITS_INTEGRAL_CONSTANT_HPP |
| |
| #include <boost/config.hpp> |
| #include <boost/mpl/bool.hpp> |
| #include <boost/mpl/integral_c.hpp> |
| |
| namespace boost{ |
| |
| #if defined(BOOST_NO_DEPENDENT_TYPES_IN_TEMPLATE_VALUE_PARAMETERS) || defined(__BORLANDC__) |
| template <class T, int val> |
| #else |
| template <class T, T val> |
| #endif |
| struct integral_constant : public mpl::integral_c<T, val> |
| { |
| typedef integral_constant<T,val> type; |
| }; |
| |
| template<> struct integral_constant<bool,true> : public mpl::true_ |
| { |
| typedef integral_constant<bool,true> type; |
| }; |
| template<> struct integral_constant<bool,false> : public mpl::false_ |
| { |
| typedef integral_constant<bool,false> type; |
| }; |
| |
| typedef integral_constant<bool,true> true_type; |
| typedef integral_constant<bool,false> false_type; |
| |
| } |
| |
| #endif |