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124 lines
2.6 KiB
124 lines
2.6 KiB
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#ifndef BOOST_MPL_AUX_TRANSFORM_ITER_HPP_INCLUDED
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#define BOOST_MPL_AUX_TRANSFORM_ITER_HPP_INCLUDED
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// Copyright Aleksey Gurtovoy 2000-2004
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//
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// See http://www.boost.org/libs/mpl for documentation.
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// $Id$
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// $Date$
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// $Revision$
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#include <boost/mpl/apply.hpp>
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#include <boost/mpl/iterator_tags.hpp>
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#include <boost/mpl/next.hpp>
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#include <boost/mpl/deref.hpp>
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#include <boost/mpl/aux_/lambda_spec.hpp>
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#include <boost/mpl/aux_/config/ctps.hpp>
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#include <boost/type_traits/is_same.hpp>
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namespace boost { namespace mpl {
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namespace aux {
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#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
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template<
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typename Iterator
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, typename LastIterator
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, typename F
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>
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struct transform_iter
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{
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typedef Iterator base;
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typedef forward_iterator_tag category;
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typedef transform_iter< typename mpl::next<base>::type,LastIterator,F > next;
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typedef typename apply1<
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F
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, typename deref<base>::type
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>::type type;
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};
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template<
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typename LastIterator
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, typename F
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>
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struct transform_iter< LastIterator,LastIterator,F >
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{
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typedef LastIterator base;
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typedef forward_iterator_tag category;
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};
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#else
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template<
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typename Iterator
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, typename LastIterator
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, typename F
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>
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struct transform_iter;
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template< bool >
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struct transform_iter_impl
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{
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template<
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typename Iterator
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, typename LastIterator
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, typename F
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>
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struct result_
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{
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typedef Iterator base;
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typedef forward_iterator_tag category;
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typedef transform_iter< typename mpl::next<Iterator>::type,LastIterator,F > next;
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typedef typename apply1<
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F
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, typename deref<Iterator>::type
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>::type type;
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};
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};
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template<>
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struct transform_iter_impl<true>
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{
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template<
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typename Iterator
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, typename LastIterator
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, typename F
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>
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struct result_
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{
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typedef Iterator base;
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typedef forward_iterator_tag category;
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};
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};
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template<
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typename Iterator
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, typename LastIterator
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, typename F
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>
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struct transform_iter
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: transform_iter_impl<
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::boost::is_same<Iterator,LastIterator>::value
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>::template result_< Iterator,LastIterator,F >
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{
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};
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#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
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} // namespace aux
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BOOST_MPL_AUX_PASS_THROUGH_LAMBDA_SPEC(3, aux::transform_iter)
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}}
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#endif // BOOST_MPL_AUX_TRANSFORM_ITER_HPP_INCLUDED
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