Jeff Thompson | f7d4994 | 2013-08-01 16:47:40 -0700 | [diff] [blame] | 1 | // (C) Copyright John Maddock 2005. |
| 2 | // Use, modification and distribution are subject to the |
| 3 | // Boost Software License, Version 1.0. (See accompanying file |
| 4 | // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| 5 | |
| 6 | #ifndef BOOST_TYPE_TRAITS_INTEGRAL_CONSTANT_HPP |
| 7 | #define BOOST_TYPE_TRAITS_INTEGRAL_CONSTANT_HPP |
| 8 | |
Jeff Thompson | 2277ce5 | 2013-08-01 17:34:11 -0700 | [diff] [blame] | 9 | #include <ndnboost/config.hpp> |
| 10 | #include <ndnboost/mpl/bool.hpp> |
| 11 | #include <ndnboost/mpl/integral_c.hpp> |
Jeff Thompson | f7d4994 | 2013-08-01 16:47:40 -0700 | [diff] [blame] | 12 | |
| 13 | namespace ndnboost{ |
| 14 | |
| 15 | #if defined(BOOST_NO_DEPENDENT_TYPES_IN_TEMPLATE_VALUE_PARAMETERS) || defined(__BORLANDC__) |
| 16 | template <class T, int val> |
| 17 | #else |
| 18 | template <class T, T val> |
| 19 | #endif |
| 20 | struct integral_constant : public mpl::integral_c<T, val> |
| 21 | { |
| 22 | typedef integral_constant<T,val> type; |
| 23 | }; |
| 24 | |
| 25 | template<> struct integral_constant<bool,true> : public mpl::true_ |
| 26 | { |
| 27 | #if BOOST_WORKAROUND(BOOST_MSVC, < 1300) |
| 28 | # pragma warning(push) |
| 29 | # pragma warning(disable:4097) |
| 30 | typedef mpl::true_ base_; |
| 31 | using base_::value; |
| 32 | # pragma warning(pop) |
| 33 | #endif |
| 34 | typedef integral_constant<bool,true> type; |
| 35 | }; |
| 36 | template<> struct integral_constant<bool,false> : public mpl::false_ |
| 37 | { |
| 38 | #if BOOST_WORKAROUND(BOOST_MSVC, < 1300) |
| 39 | # pragma warning(push) |
| 40 | # pragma warning(disable:4097) |
| 41 | typedef mpl::false_ base_; |
| 42 | using base_::value; |
| 43 | # pragma warning(pop) |
| 44 | #endif |
| 45 | typedef integral_constant<bool,false> type; |
| 46 | }; |
| 47 | |
| 48 | typedef integral_constant<bool,true> true_type; |
| 49 | typedef integral_constant<bool,false> false_type; |
| 50 | |
| 51 | } |
| 52 | |
| 53 | #endif |