liuxiaolong
2021-07-20 58d904a328c0d849769b483e901a0be9426b8209
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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_DETAIL_IOS_HPP_INCLUDED
#define BOOST_IOSTREAMS_DETAIL_IOS_HPP_INCLUDED
 
#if defined(_MSC_VER)
# pragma once
#endif              
                 
#include <boost/config.hpp> // BOOST_MSVC.
#include <boost/detail/workaround.hpp>
#include <boost/iostreams/detail/config/wide_streams.hpp>
#ifndef BOOST_IOSTREAMS_NO_STREAM_TEMPLATES
# if !BOOST_WORKAROUND(__MWERKS__, <= 0x3003)
#  include <ios>
# else
#  include <istream>
#  include <ostream>
# endif
#else 
# include <exception>
# include <iosfwd>
#endif 
 
namespace boost { namespace iostreams { namespace detail {
 
#ifndef BOOST_IOSTREAMS_NO_STREAM_TEMPLATES //--------------------------------//
# define BOOST_IOSTREAMS_BASIC_IOS(ch, tr)  std::basic_ios< ch, tr >
# if !BOOST_WORKAROUND(__MWERKS__, <= 0x3003) && \
     !BOOST_WORKAROUND(BOOST_BORLANDC, < 0x600) \
     /**/
 
#define BOOST_IOS                std::ios
#define BOOST_IOSTREAMS_FAILURE  std::ios::failure
 
# else
 
#define BOOST_IOS                std::ios_base
#define BOOST_IOSTREAMS_FAILURE  std::ios_base::failure
 
# endif
#else // #ifndef BOOST_IOSTREAMS_NO_STREAM_TEMPLATES //-----------------------//
 
#define BOOST_IOS                          std::ios
#define BOOST_IOSTREAMS_BASIC_IOS(ch, tr)  std::ios
#define BOOST_IOSTREAMS_FAILURE            boost::iostreams::detail::failure
 
class failure : std::exception {    
public:
    explicit failure(const std::string& what_arg) : what_(what_arg) { }
    const char* what() const { return what_.c_str(); }
private:
    std::string what_;
};
 
#endif // #ifndef BOOST_IOSTREAMS_NO_STREAM_TEMPLATES //----------------------//
 
} } } // End namespace failure, iostreams, boost.
 
#endif // #ifndef BOOST_IOSTREAMS_DETAIL_IOS_HPP_INCLUDED