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1 | /*-----------------------------------------------------------------------------+ |
2 | Copyright (c) 2010-2010: Joachim Faulhaber | |
3 | +------------------------------------------------------------------------------+ | |
4 | Distributed under the Boost Software License, Version 1.0. | |
5 | (See accompanying file LICENCE.txt or copy at | |
6 | http://www.boost.org/LICENSE_1_0.txt) | |
7 | +-----------------------------------------------------------------------------*/ | |
8 | #ifndef BOOST_ICL_TYPE_TRAITS_ADDS_INVERSELY_HPP_JOFA_100829 | |
9 | #define BOOST_ICL_TYPE_TRAITS_ADDS_INVERSELY_HPP_JOFA_100829 | |
10 | ||
11 | #include <boost/icl/type_traits/has_inverse.hpp> | |
12 | #include <boost/icl/functors.hpp> | |
13 | ||
14 | namespace boost{ namespace icl | |
15 | { | |
16 | ||
17 | template<class Type, class Combiner> | |
18 | struct adds_inversely | |
19 | { | |
20 | typedef adds_inversely type; | |
21 | BOOST_STATIC_CONSTANT(bool, | |
22 | value = (mpl::and_<has_inverse<Type>, is_negative<Combiner> >::value)); | |
23 | }; | |
24 | ||
25 | }} // namespace boost icl | |
26 | ||
27 | #endif // BOOST_ICL_TYPE_TRAITS_ADDS_INVERSELY_HPP_JOFA_100829 | |
28 | ||
29 |