ext-boost/boost/icl/concept/map_value.hpp

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2016-03-02 05:27:27 +00:00
/*-----------------------------------------------------------------------------+
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