42 lines
1.1 KiB
C++
42 lines
1.1 KiB
C++
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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/**
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* Copyright (C) 2014 Named Data Networking Project
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* See COPYING for copyright and distribution information.
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*/
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#ifndef NFD_CORE_MAP_VALUE_ITERATOR_H
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#define NFD_CORE_MAP_VALUE_ITERATOR_H
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#include "common.hpp"
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#include <boost/iterator/transform_iterator.hpp>
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namespace nfd {
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/** \class MapValueIterator
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* \brief ForwardIterator to iterator over map values
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*/
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template<typename Map>
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class MapValueIterator
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: public boost::transform_iterator<function<const typename Map::mapped_type&(const typename Map::value_type&)>,
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typename Map::const_iterator>
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{
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public:
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explicit
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MapValueIterator(typename Map::const_iterator it)
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: boost::transform_iterator<function<const typename Map::mapped_type&(const typename Map::value_type&)>,
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typename Map::const_iterator>(it, &takeSecond)
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{
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}
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private:
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static const typename Map::mapped_type&
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takeSecond(const typename Map::value_type& pair)
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{
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return pair.second;
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}
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};
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} // namespace nfd
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#endif // NFD_CORE_MAP_VALUE_ITERATOR_H
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