| /*-----------------------------------------------------------------------------+ |
| Copyright (c) 2010-2010: Joachim Faulhaber |
| +------------------------------------------------------------------------------+ |
| Distributed under the Boost Software License, Version 1.0. |
| (See accompanying file LICENCE.txt or copy at |
| http://www.boost.org/LICENSE_1_0.txt) |
| +-----------------------------------------------------------------------------*/ |
| #ifndef BOOST_ICL_CONCEPT_MAP_VALUE_HPP_JOFA_100924 |
| #define BOOST_ICL_CONCEPT_MAP_VALUE_HPP_JOFA_100924 |
| |
| #include <boost/icl/type_traits/predicate.hpp> |
| #include <boost/icl/type_traits/identity_element.hpp> |
| #include <boost/icl/type_traits/is_map.hpp> |
| |
| namespace boost{ namespace icl |
| { |
| |
| //============================================================================== |
| //= AlgoUnifiers<Map> |
| //============================================================================== |
| template<class Type, class Iterator> |
| inline typename enable_if<is_map<Type>, const typename Type::key_type>::type& |
| key_value(Iterator it_) |
| { |
| return (*it_).first; |
| } |
| |
| template<class Type, class Iterator> |
| inline typename enable_if<is_map<Type>, const typename Type::codomain_type>::type& |
| co_value(Iterator it_) |
| { |
| return (*it_).second; |
| } |
| |
| template<class Type> |
| inline typename enable_if<is_map<Type>, typename Type::value_type>::type |
| make_value(const typename Type:: key_type& key_val, |
| const typename Type::codomain_type& co_val) |
| { |
| return typename Type::value_type(key_val, co_val); |
| } |
| |
| |
| template <class Type> |
| class content_is_identity_element: public property<Type> |
| { |
| public: |
| bool operator() (const Type& value_pair)const |
| { |
| return value_pair.second |
| == identity_element<typename Type::second_type>::value(); |
| } |
| } ; |
| |
| |
| |
| }} // namespace boost icl |
| |
| #endif |
| |
| |