Chris@16: /*-----------------------------------------------------------------------------+    
Chris@16: Copyright (c) 2010-2010: Joachim Faulhaber
Chris@16: +------------------------------------------------------------------------------+
Chris@16:    Distributed under the Boost Software License, Version 1.0.
Chris@16:       (See accompanying file LICENCE.txt or copy at
Chris@16:            http://www.boost.org/LICENSE_1_0.txt)
Chris@16: +-----------------------------------------------------------------------------*/
Chris@16: #ifndef BOOST_ICL_CONCEPT_MAP_VALUE_HPP_JOFA_100924
Chris@16: #define BOOST_ICL_CONCEPT_MAP_VALUE_HPP_JOFA_100924
Chris@16: 
Chris@16: #include <boost/icl/type_traits/predicate.hpp>
Chris@16: #include <boost/icl/type_traits/identity_element.hpp>
Chris@16: #include <boost/icl/type_traits/is_map.hpp>
Chris@16: 
Chris@16: namespace boost{ namespace icl
Chris@16: {
Chris@16: 
Chris@16: //==============================================================================
Chris@16: //= AlgoUnifiers<Map>
Chris@16: //==============================================================================
Chris@16: template<class Type, class Iterator>
Chris@16: inline typename enable_if<is_map<Type>, const typename Type::key_type>::type&
Chris@16: key_value(Iterator it_)
Chris@16: {
Chris@16:     return (*it_).first;
Chris@16: }
Chris@16: 
Chris@16: template<class Type, class Iterator>
Chris@16: inline typename enable_if<is_map<Type>, const typename Type::codomain_type>::type&
Chris@16: co_value(Iterator it_)
Chris@16: {
Chris@16:     return (*it_).second;
Chris@16: }
Chris@16: 
Chris@16: template<class Type>
Chris@16: inline typename enable_if<is_map<Type>, typename Type::value_type>::type
Chris@16: make_value(const typename Type::     key_type& key_val, 
Chris@16:            const typename Type::codomain_type&  co_val)
Chris@16: {
Chris@16:     return typename Type::value_type(key_val, co_val);
Chris@16: }
Chris@16: 
Chris@16: 
Chris@16: template <class Type>
Chris@16: class content_is_identity_element: public property<Type>
Chris@16: {
Chris@16: public:
Chris@16:     bool operator() (const Type& value_pair)const 
Chris@16:     { 
Chris@16:         return value_pair.second 
Chris@16:             == identity_element<typename Type::second_type>::value(); 
Chris@16:     }
Chris@16: } ;
Chris@16: 
Chris@16: 
Chris@16: 
Chris@16: }} // namespace boost icl
Chris@16: 
Chris@16: #endif
Chris@16: 
Chris@16: