forked from boostorg/mpl
86 lines
2.5 KiB
C++
86 lines
2.5 KiB
C++
//-----------------------------------------------------------------------------
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// boost mpl/insert_range_impl.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_INSERT_RANGE_IMPL_HPP_INCLUDED
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#define BOOST_MPL_AUX_INSERT_RANGE_IMPL_HPP_INCLUDED
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#include "boost/mpl/iter_fold_backward.hpp"
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#include "boost/mpl/fold_backward.hpp"
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#include "boost/mpl/clear.hpp"
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#include "boost/mpl/push_front.hpp"
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#include "boost/mpl/identity.hpp"
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#include "boost/mpl/apply_if.hpp"
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#include "boost/mpl/aux_/void_spec.hpp"
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#include "boost/mpl/aux_/iter_push_front.hpp"
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#include "boost/mpl/aux_/traits_lambda_spec.hpp"
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#include "boost/type_traits/same_traits.hpp"
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namespace boost {
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namespace mpl {
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// default implementation; conrete sequences might override it by
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// specializing either the |insert_range_traits| or the primary
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// |insert_range| template
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namespace aux {
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template<
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typename Pos
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, typename Range
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>
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struct iter_range_inserter
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{
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template< typename Sequence, typename Iterator > struct apply
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{
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typedef typename aux::iter_push_front<
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typename apply_if<
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is_same<Pos,typename Iterator::next>
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, fold_backward< Range, Sequence, push_front<_,_> >
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, identity<Sequence>
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>::type
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, Iterator
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>::type type;
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};
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};
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} // namespace aux
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template< typename Tag >
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struct insert_range_traits
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{
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template<
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typename Sequence
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, typename Pos
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, typename Range
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>
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struct algorithm
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{
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typedef typename iter_fold_backward<
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Sequence
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, typename clear<Sequence>::type
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, aux::iter_range_inserter<Pos,Range>
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>::type type;
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};
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};
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BOOST_MPL_ALGORITM_TRAITS_LAMBDA_SPEC(3,insert_range_traits)
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} // namespace mpl
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} // namespace boost
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#endif // BOOST_MPL_AUX_INSERT_RANGE_IMPL_HPP_INCLUDED
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