63e88f80
 Hu Chunming
提交三方库
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// (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
// (C) Copyright 2003-2007 Jonathan Turkanis
// 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.
#ifndef BOOST_IOSTREAMS_CONCEPTS_HPP_INCLUDED
#define BOOST_IOSTREAMS_CONCEPTS_HPP_INCLUDED
#if defined(_MSC_VER)
# pragma once
#endif
#include <boost/config.hpp> // BOOST_MSVC
#include <boost/detail/workaround.hpp>
#include <boost/iostreams/categories.hpp>
#include <boost/iostreams/detail/default_arg.hpp>
#include <boost/iostreams/detail/ios.hpp> // openmode.
#include <boost/iostreams/positioning.hpp>
#include <boost/static_assert.hpp>
#include <boost/type_traits/is_convertible.hpp>
namespace boost { namespace iostreams {
//--------------Definitions of helper templates for device concepts-----------//
template<typename Mode, typename Ch = char>
struct device {
typedef Ch char_type;
struct category
: Mode,
device_tag,
closable_tag,
localizable_tag
{ };
void close()
{
using namespace detail;
BOOST_STATIC_ASSERT((!is_convertible<Mode, two_sequence>::value));
}
void close(BOOST_IOS::openmode)
{
using namespace detail;
BOOST_STATIC_ASSERT((is_convertible<Mode, two_sequence>::value));
}
template<typename Locale>
void imbue(const Locale&) { }
};
template<typename Mode, typename Ch = wchar_t>
struct wdevice : device<Mode, Ch> { };
typedef device<input> source;
typedef wdevice<input> wsource;
typedef device<output> sink;
typedef wdevice<output> wsink;
//--------------Definitions of helper templates for simple filter concepts----//
template<typename Mode, typename Ch = char>
struct filter {
typedef Ch char_type;
struct category
: Mode,
filter_tag,
closable_tag,
localizable_tag
{ };
template<typename Device>
void close(Device&)
{
using namespace detail;
BOOST_STATIC_ASSERT((!is_convertible<Mode, two_sequence>::value));
BOOST_STATIC_ASSERT((!is_convertible<Mode, dual_use>::value));
}
template<typename Device>
void close(Device&, BOOST_IOS::openmode)
{
using namespace detail;
BOOST_STATIC_ASSERT(
(is_convertible<Mode, two_sequence>::value) ||
(is_convertible<Mode, dual_use>::value)
);
}
template<typename Locale>
void imbue(const Locale&) { }
};
template<typename Mode, typename Ch = wchar_t>
struct wfilter : filter<Mode, Ch> { };
typedef filter<input> input_filter;
typedef wfilter<input> input_wfilter;
typedef filter<output> output_filter;
typedef wfilter<output> output_wfilter;
typedef filter<seekable> seekable_filter;
typedef wfilter<seekable> seekable_wfilter;
typedef filter<dual_use> dual_use_filter;
typedef wfilter<dual_use> dual_use_wfilter;
//------Definitions of helper templates for multi-character filter cncepts----//
template<typename Mode, typename Ch = char>
struct multichar_filter : filter<Mode, Ch> {
struct category : filter<Mode, Ch>::category, multichar_tag { };
};
template<typename Mode, typename Ch = wchar_t>
struct multichar_wfilter : multichar_filter<Mode, Ch> { };
typedef multichar_filter<input> multichar_input_filter;
typedef multichar_wfilter<input> multichar_input_wfilter;
typedef multichar_filter<output> multichar_output_filter;
typedef multichar_wfilter<output> multichar_output_wfilter;
typedef multichar_filter<dual_use> multichar_dual_use_filter;
typedef multichar_wfilter<dual_use> multichar_dual_use_wfilter;
//----------------------------------------------------------------------------//
} } // End namespaces iostreams, boost.
#endif // #ifndef BOOST_IOSTREAMS_CONCEPTS_HPP_INCLUDED
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