forked from boostorg/fusion
fusion: merge of associative iterators/views and the new fold interface
[SVN r58618]
This commit is contained in:
Christopher Schmidt
136
include/boost/fusion/iterator/basic_iterator.hpp
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136
include/boost/fusion/iterator/basic_iterator.hpp
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/*=============================================================================
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Copyright (c) 2009 Christopher Schmidt
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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==============================================================================*/
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#ifndef BOOST_FUSION_ITERATOR_BASIC_ITERATOR_HPP
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#define BOOST_FUSION_ITERATOR_BASIC_ITERATOR_HPP
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#include <boost/fusion/iterator/iterator_facade.hpp>
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#include <boost/mpl/and.hpp>
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#include <boost/mpl/equal_to.hpp>
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#include <boost/mpl/minus.hpp>
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#include <boost/mpl/int.hpp>
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#include <boost/type_traits/is_same.hpp>
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#include <boost/type_traits/remove_const.hpp>
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namespace boost { namespace fusion
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{
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namespace extension
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{
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template <typename>
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struct value_of_impl;
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template <typename>
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struct deref_impl;
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template <typename>
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struct value_of_data_impl;
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template <typename>
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struct key_of_impl;
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template <typename>
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struct deref_data_impl;
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}
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template<typename Tag, typename Category, typename Seq, int Index>
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struct basic_iterator
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: iterator_facade<basic_iterator<Tag,Category,Seq,Index>, Category>
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{
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typedef mpl::int_<Index> index;
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typedef Seq seq_type;
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template <typename It>
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struct value_of
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: extension::value_of_impl<Tag>::template apply<It>
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{};
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template <typename It>
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struct deref
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: extension::deref_impl<Tag>::template apply<It>
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{};
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template <typename It>
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struct value_of_data
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: extension::value_of_data_impl<Tag>::template apply<It>
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{};
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template <typename It>
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struct key_of
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: extension::key_of_impl<Tag>::template apply<It>
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{};
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template <typename It>
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struct deref_data
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: extension::deref_data_impl<Tag>::template apply<It>
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{};
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template <typename It, typename N>
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struct advance
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{
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typedef
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basic_iterator<Tag, Category, Seq, Index + N::value>
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type;
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static type
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call(It const& it)
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{
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return type(*it.seq,0);
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}
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};
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template <typename It>
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struct next
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: advance<It, mpl::int_<1> >
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{};
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template <typename It>
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struct prior
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: advance<It, mpl::int_<-1> >
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{};
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template <typename It1, typename It2>
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struct distance
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: mpl::minus<
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typename It2::index
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, typename It1::index
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>
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{};
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template <typename It1, typename It2>
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struct equal_to
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: mpl::and_<
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is_same<
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typename remove_const<typename It1::seq_type>::type
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, typename remove_const<typename It2::seq_type>::type
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>
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, mpl::equal_to<typename It1::index,typename It2::index>
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>
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{};
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template<typename OtherSeq>
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basic_iterator(basic_iterator<Tag,Category,OtherSeq,Index> const& it)
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: seq(it.seq)
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{}
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basic_iterator(Seq& seq, int)
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: seq(&seq)
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{}
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template<typename OtherSeq>
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basic_iterator&
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operator=(basic_iterator<Tag,Category,OtherSeq,Index> const& it)
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{
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seq=it.seq;
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return *this;
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}
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Seq* seq;
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};
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}}
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#endif
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49
include/boost/fusion/iterator/deref_data.hpp
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49
include/boost/fusion/iterator/deref_data.hpp
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@ -0,0 +1,49 @@
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/*=============================================================================
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Copyright (c) 2009 Christopher Schmidt
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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==============================================================================*/
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#ifndef BOOST_FUSION_ITERATOR_DEREF_DATA_HPP
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#define BOOST_FUSION_ITERATOR_DEREF_DATA_HPP
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#include <boost/fusion/support/tag_of.hpp>
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namespace boost { namespace fusion
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{
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struct iterator_facade_tag;
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namespace extension
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{
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template <typename>
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struct deref_data_impl;
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template <>
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struct deref_data_impl<iterator_facade_tag>
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{
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template <typename It>
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struct apply
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: It::template deref_data<It>
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{};
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};
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}
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namespace result_of
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{
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template <typename It>
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struct deref_data
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: extension::deref_data_impl<typename traits::tag_of<It>::type>::
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template apply<It>
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{};
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}
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template <typename It>
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typename result_of::deref_data<It>::type
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deref_data(It const& it)
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{
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return result_of::deref_data<It>::call(it);
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}
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}}
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#endif
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@ -50,8 +50,7 @@ namespace boost { namespace fusion
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template <typename First, typename Last>
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struct distance :
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distance_detail::linear_distance<First, Last>
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{
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};
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{};
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};
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}}
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42
include/boost/fusion/iterator/key_of.hpp
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42
include/boost/fusion/iterator/key_of.hpp
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@ -0,0 +1,42 @@
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/*=============================================================================
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Copyright (c) 2009 Christopher Schmidt
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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==============================================================================*/
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#ifndef BOOST_FUSION_ITERATOR_KEY_OF_HPP
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#define BOOST_FUSION_ITERATOR_KEY_OF_HPP
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#include <boost/fusion/support/tag_of.hpp>
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namespace boost { namespace fusion
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{
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struct iterator_facade_tag;
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namespace extension
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{
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template <typename>
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struct key_of_impl;
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template <>
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struct key_of_impl<iterator_facade_tag>
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{
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template <typename It>
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struct apply
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: It::template key_of<It>
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{};
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};
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}
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namespace result_of
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{
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template <typename It>
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struct key_of
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: extension::key_of_impl<typename traits::tag_of<It>::type>::
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template apply<It>
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{};
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}
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}}
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#endif
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42
include/boost/fusion/iterator/value_of_data.hpp
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42
include/boost/fusion/iterator/value_of_data.hpp
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@ -0,0 +1,42 @@
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/*=============================================================================
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Copyright (c) 2009 Christopher Schmidt
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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==============================================================================*/
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#ifndef BOOST_FUSION_ITERATOR_VALUE_OF_DATA_HPP
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#define BOOST_FUSION_ITERATOR_VALUE_OF_DATA_HPP
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#include <boost/fusion/support/tag_of.hpp>
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namespace boost { namespace fusion
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{
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struct iterator_facade_tag;
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namespace extension
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{
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template <typename>
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struct value_of_data_impl;
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template <>
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struct value_of_data_impl<iterator_facade_tag>
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{
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template <typename It>
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struct apply
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: It::template value_of_data<It>
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{};
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};
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}
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namespace result_of
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{
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template <typename It>
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struct value_of_data
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: extension::value_of_data_impl<typename traits::tag_of<It>::type>::
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template apply<It>
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{};
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}
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}}
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#endif
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