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Diffstat (limited to '3rdParty/Boost/boost/mpl/aux_/begin_end_impl.hpp')
-rw-r--r-- | 3rdParty/Boost/boost/mpl/aux_/begin_end_impl.hpp | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/3rdParty/Boost/boost/mpl/aux_/begin_end_impl.hpp b/3rdParty/Boost/boost/mpl/aux_/begin_end_impl.hpp new file mode 100644 index 0000000..d3b9682 --- /dev/null +++ b/3rdParty/Boost/boost/mpl/aux_/begin_end_impl.hpp @@ -0,0 +1,101 @@ + +#ifndef BOOST_MPL_AUX_BEGIN_END_IMPL_HPP_INCLUDED +#define BOOST_MPL_AUX_BEGIN_END_IMPL_HPP_INCLUDED + +// Copyright Aleksey Gurtovoy 2000-2004 +// +// Distributed under the Boost Software License, Version 1.0. +// (See accompanying file LICENSE_1_0.txt or copy at +// http://www.boost.org/LICENSE_1_0.txt) +// +// See http://www.boost.org/libs/mpl for documentation. + +// $Id: begin_end_impl.hpp 49267 2008-10-11 06:19:02Z agurtovoy $ +// $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $ +// $Revision: 49267 $ + +#include <boost/mpl/begin_end_fwd.hpp> +#include <boost/mpl/sequence_tag_fwd.hpp> +#include <boost/mpl/void.hpp> +#include <boost/mpl/eval_if.hpp> +#include <boost/mpl/aux_/has_begin.hpp> +#include <boost/mpl/aux_/na.hpp> +#include <boost/mpl/aux_/traits_lambda_spec.hpp> +#include <boost/mpl/aux_/config/eti.hpp> + +namespace boost { namespace mpl { + + +namespace aux { + +template< typename Sequence > +struct begin_type +{ + typedef typename Sequence::begin type; +}; +template< typename Sequence > +struct end_type +{ + typedef typename Sequence::end type; +}; + +} + +// default implementation; conrete sequences might override it by +// specializing either the 'begin_impl/end_impl' or the primary +// 'begin/end' templates + +template< typename Tag > +struct begin_impl +{ + template< typename Sequence > struct apply + { + typedef typename eval_if<aux::has_begin<Sequence, true_>, + aux::begin_type<Sequence>, void_>::type type; + }; +}; + +template< typename Tag > +struct end_impl +{ + template< typename Sequence > struct apply + { + typedef typename eval_if<aux::has_begin<Sequence, true_>, + aux::end_type<Sequence>, void_>::type type; + }; +}; + +// specialize 'begin_trait/end_trait' for two pre-defined tags + +# define AUX778076_IMPL_SPEC(name, tag, result) \ +template<> \ +struct name##_impl<tag> \ +{ \ + template< typename Sequence > struct apply \ + { \ + typedef result type; \ + }; \ +}; \ +/**/ + +// a sequence with nested 'begin/end' typedefs; just query them +AUX778076_IMPL_SPEC(begin, nested_begin_end_tag, typename Sequence::begin) +AUX778076_IMPL_SPEC(end, nested_begin_end_tag, typename Sequence::end) + +// if a type 'T' does not contain 'begin/end' or 'tag' members +// and doesn't specialize either 'begin/end' or 'begin_impl/end_impl' +// templates, then we end up here +AUX778076_IMPL_SPEC(begin, non_sequence_tag, void_) +AUX778076_IMPL_SPEC(end, non_sequence_tag, void_) +AUX778076_IMPL_SPEC(begin, na, void_) +AUX778076_IMPL_SPEC(end, na, void_) + +# undef AUX778076_IMPL_SPEC + + +BOOST_MPL_ALGORITM_TRAITS_LAMBDA_SPEC_IMPL(1,begin_impl) +BOOST_MPL_ALGORITM_TRAITS_LAMBDA_SPEC_IMPL(1,end_impl) + +}} + +#endif // BOOST_MPL_AUX_BEGIN_END_IMPL_HPP_INCLUDED |