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