/*-----------------------------------------------------------------------------+ | |
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 | |