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[SVN r40230]
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Joel de Guzman
2007-10-20 23:49:46 +00:00
parent 66cc9bbc28
commit 13b01b0bfe
474 changed files with 0 additions and 25526 deletions
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46
include/boost/fusion/support/sequence_base.hpp
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/*=============================================================================
Copyright (c) 2001-2006 Joel de Guzman
Copyright (c) 2007 Tobias Schwinger
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)
==============================================================================*/
#if !defined(FUSION_SEQUENCE_BASE_04182005_0737)
#define FUSION_SEQUENCE_BASE_04182005_0737
#include <boost/fusion/support/detail/compiler_config.hpp>
#include <boost/mpl/begin_end_fwd.hpp>
namespace boost { namespace fusion
{
struct sequence_root {};
template <typename Sequence>
struct sequence_base : sequence_root
{
Sequence const&
derived() const
{
return static_cast<Sequence const&>(*this);
}
Sequence&
derived()
{
return static_cast<Sequence&>(*this);
}
};
struct fusion_sequence_tag;
}}
namespace boost { namespace mpl
{
// Deliberately break mpl::begin, so it doesn't lie that a Fusion sequence
// is not an MPL sequence by returning mpl::void_.
// In other words: Fusion Sequences are always MPL Sequences, but they can
// be incompletely defined.
template<> struct begin_impl< boost::fusion::fusion_sequence_tag >;
}}
#endif