forked from boostorg/mpl
67 lines
2.0 KiB
C++
67 lines
2.0 KiB
C++
//-----------------------------------------------------------------------------
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// boost mpl/zip_view.hpp header file
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// See http://www.boost.org for updates, documentation, and revision history.
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//-----------------------------------------------------------------------------
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//
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// Copyright (c) 2000-02
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// David Abrahams, Aleksey Gurtovoy
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//
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// Permission to use, copy, modify, distribute and sell this software
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// and its documentation for any purpose is hereby granted without fee,
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// provided that the above copyright notice appears in all copies and
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// that both the copyright notice and this permission notice appear in
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// supporting documentation. No representations are made about the
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// suitability of this software for any purpose. It is provided "as is"
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// without express or implied warranty.
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#ifndef BOOST_MPL_ZIP_VIEW_HPP_INCLUDED
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#define BOOST_MPL_ZIP_VIEW_HPP_INCLUDED
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#include "boost/mpl/transform.hpp"
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#include "boost/mpl/begin_end.hpp"
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#include "boost/mpl/iterator_tag.hpp"
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#include "boost/mpl/next.hpp"
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#include "boost/mpl/lambda.hpp"
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#include "boost/mpl/apply.hpp"
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#include "boost/mpl/aux_/void_spec.hpp"
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namespace boost { namespace mpl {
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template< typename IteratorSeq >
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struct zip_iterator
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{
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typedef input_iter_tag_ category;
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typedef typename transform<
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IteratorSeq
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, apply0<_1>
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>::type type;
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typedef zip_iterator<
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typename transform<
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IteratorSeq
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, next<_1>
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>::type
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> next;
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};
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template<
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typename BOOST_MPL_AUX_VOID_SPEC_PARAM(Sequences)
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>
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struct zip_view
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{
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private:
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typedef typename transform< Sequences, begin<_1> >::type first_ones_;
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typedef typename transform< Sequences, end<_1> >::type last_ones_;
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public:
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typedef nested_begin_end_tag tag;
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typedef zip_iterator<first_ones_> begin;
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typedef zip_iterator<last_ones_> end;
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};
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BOOST_MPL_AUX_VOID_SPEC(1, zip_view)
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}} // namespace boost::mpl
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#endif // BOOST_MPL_ZIP_VIEW_HPP_INCLUDED
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