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removed broken, half-baked code

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[SVN r27162]
This commit is contained in:
Jonathan Turkanis
2005-02-06 04:00:21 +00:00
parent d6d09bebfb
commit 8efcb0c2ca
1 changed files with 0 additions and 91 deletions
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91
include/boost/iostreams/detail/compose.hpp
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// (C) Copyright Jonathan Turkanis 2003.
// 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/iostreams for documentation.
// Contains the definition of the class template access_control, which
// allows the type of inheritance from a provided base class to be specified
// using a template parameter.
#ifndef BOOST_IOSTREAMS_DETAIL_COMPOSE_HPP_INCLUDED
#define BOOST_IOSTREAMS_DETAIL_COMPOSE_HPP_INCLUDED
#if defined(_MSC_VER) && (_MSC_VER >= 1020)
# pragma once
#endif
#include <boost/iostreams/categories.hpp>
#include <boost/iostreams/detail/adapter/concept_adapter.hpp>
#include <boost/iostreams/io_traits.hpp>
#include <boost/iostreams/is_filter.hpp>
#include <boost/iostreams/operations.hpp>
namespace boost { namespace iostreams { namespace detail {
template<typename Composition, typename Concept>
struct composition {
typedef BOOST_IOSTREAMS_CAR_TYPE(Concept) char_type;
typedef typename
mpl::if_<
is_filter<Concept>,
filter_tag,
device_tag
>::type base_tag;
typedef typename
mpl::if_<
is_filter<Concept>,
filter_tag,
device_tag
>::type mode_tag;
struct category1
: base_tag,
dual_use_tag,
closable_tag,
localizable_tag
{ };
};
struct null_piper {
template<typename Chain>
void push(Chain& chn) const { }
};
template<typename Piper, typename Concept>
struct piper {
piper(const Concept& concept)
: p_(0), concept_(&concept)
{
BOOST_STATIC_ASSERT((is_same<Piper, null_piper>::value));
}
piper(const Piper& p, const Concept& concept)
: p_(&p), concept_(&concept)
{
BOOST_STATIC_ASSERT((!is_same<Piper, null_piper>::value));
}
template<typename Chain>
void push(Chain& chn) const
{
if (p_) p_->push(chn);
chn.push(*concept_);
}
const Piper* p_;
const Concept* concept_;
};
template<typename Piper, typename Filter, typename Concept>
piper<piper<Piper, Filter>, Concept>
operator|(const piper<Piper, Filter>& p, const Concept& cpt)
{
BOOST_STATIC_ASSERT(is_filter<Filter>::value);
return piper<piper<Piper, Filter>, Concept>(p, cpt);
}
} } } // End namespaces iostreams, boost.
#endif // #ifndef BOOST_IOSTREAMS_DETAIL_COMPOSE_HPP_INCLUDED