forked from boostorg/mpl
127 lines
3.1 KiB
C++
127 lines
3.1 KiB
C++
//-----------------------------------------------------------------------------
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// boost mpl/aux_/transform_iter.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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// 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_AUX_TRANSFORM_ITER_HPP_INCLUDED
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#define BOOST_MPL_AUX_TRANSFORM_ITER_HPP_INCLUDED
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#include "boost/mpl/apply.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 {
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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 typename base::category category;
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typedef transform_iter< typename base::next,LastIterator,F > next;
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typedef typename apply1<
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F
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, typename 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 typename base::category 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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// agurt, 14/oct/02: have to use |Iterator| instead of |base| below
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// to prevent |base| and |mpl::base| conflict on MSVC 6.0
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typedef typename Iterator::category category;
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typedef transform_iter< typename Iterator::next,LastIterator,F > next;
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typedef typename apply1<
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F
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, typename 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 typename Iterator::category 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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} // namespace mpl
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} // namespace boost
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#endif // BOOST_MPL_AUX_TRANSFORM_ITER_HPP_INCLUDED
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