refactor: make talon's choice of result message easier to read in the code as per Richard's suggestion.
// Boost io/ios_state.hpp header file --------------------------------------//
// Copyright 2002, 2005 Daryle Walker. Use, modification, and distribution
// are subject to the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or a copy at <http://www.boost.org/LICENSE_1_0.txt>.)
// See <http://www.boost.org/libs/io/> for the library's home page.
#ifndef BOOST_IO_IOS_STATE_HPP
#define BOOST_IO_IOS_STATE_HPP
#include <boost/io_fwd.hpp> // self include
#include <boost/detail/workaround.hpp>
#include <ios> // for std::ios_base, std::basic_ios, etc.
#ifndef BOOST_NO_STD_LOCALE
#include <locale> // for std::locale
#endif
#include <ostream> // for std::basic_ostream
#include <streambuf> // for std::basic_streambuf
#include <string> // for std::char_traits
namespace boost
{
namespace io
{
// Basic stream state saver class declarations -----------------------------//
class ios_flags_saver
{
public:
typedef ::std::ios_base state_type;
typedef ::std::ios_base::fmtflags aspect_type;
explicit ios_flags_saver( state_type &s )
: s_save_( s ), a_save_( s.flags() )
{}
ios_flags_saver( state_type &s, aspect_type const &a )
: s_save_( s ), a_save_( s.flags(a) )
{}
~ios_flags_saver()
{ this->restore(); }
void restore()
{ s_save_.flags( a_save_ ); }
private:
state_type & s_save_;
aspect_type const a_save_;
ios_flags_saver& operator=(const ios_flags_saver&);
};
class ios_precision_saver
{
public:
typedef ::std::ios_base state_type;
typedef ::std::streamsize aspect_type;
explicit ios_precision_saver( state_type &s )
: s_save_( s ), a_save_( s.precision() )
{}
ios_precision_saver( state_type &s, aspect_type const &a )
: s_save_( s ), a_save_( s.precision(a) )
{}
~ios_precision_saver()
{ this->restore(); }
void restore()
{ s_save_.precision( a_save_ ); }
private:
state_type & s_save_;
aspect_type const a_save_;
ios_precision_saver& operator=(const ios_precision_saver&);
};
class ios_width_saver
{
public:
typedef ::std::ios_base state_type;
typedef ::std::streamsize aspect_type;
explicit ios_width_saver( state_type &s )
: s_save_( s ), a_save_( s.width() )
{}
ios_width_saver( state_type &s, aspect_type const &a )
: s_save_( s ), a_save_( s.width(a) )
{}
~ios_width_saver()
{ this->restore(); }
void restore()
{ s_save_.width( a_save_ ); }
private:
state_type & s_save_;
aspect_type const a_save_;
ios_width_saver& operator=(const ios_width_saver&);
};
// Advanced stream state saver class template declarations -----------------//
template < typename Ch, class Tr >
class basic_ios_iostate_saver
{
public:
typedef ::std::basic_ios<Ch, Tr> state_type;
typedef ::std::ios_base::iostate aspect_type;
explicit basic_ios_iostate_saver( state_type &s )
: s_save_( s ), a_save_( s.rdstate() )
{}
basic_ios_iostate_saver( state_type &s, aspect_type const &a )
: s_save_( s ), a_save_( s.rdstate() )
{ s.clear(a); }
~basic_ios_iostate_saver()
{ this->restore(); }
void restore()
{ s_save_.clear( a_save_ ); }
private:
state_type & s_save_;
aspect_type const a_save_;
};
template < typename Ch, class Tr >
class basic_ios_exception_saver
{
public:
typedef ::std::basic_ios<Ch, Tr> state_type;
typedef ::std::ios_base::iostate aspect_type;
explicit basic_ios_exception_saver( state_type &s )
: s_save_( s ), a_save_( s.exceptions() )
{}
#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x582))
basic_ios_exception_saver( state_type &s, aspect_type a )
#else
basic_ios_exception_saver( state_type &s, aspect_type const &a )
#endif
: s_save_( s ), a_save_( s.exceptions() )
{ s.exceptions(a); }
~basic_ios_exception_saver()
{ this->restore(); }
void restore()
{ s_save_.exceptions( a_save_ ); }
private:
state_type & s_save_;
aspect_type const a_save_;
};
template < typename Ch, class Tr >
class basic_ios_tie_saver
{
public:
typedef ::std::basic_ios<Ch, Tr> state_type;
typedef ::std::basic_ostream<Ch, Tr> * aspect_type;
explicit basic_ios_tie_saver( state_type &s )
: s_save_( s ), a_save_( s.tie() )
{}
basic_ios_tie_saver( state_type &s, aspect_type const &a )
: s_save_( s ), a_save_( s.tie(a) )
{}
~basic_ios_tie_saver()
{ this->restore(); }
void restore()
{ s_save_.tie( a_save_ ); }
private:
state_type & s_save_;
aspect_type const a_save_;
};
template < typename Ch, class Tr >
class basic_ios_rdbuf_saver
{
public:
typedef ::std::basic_ios<Ch, Tr> state_type;
typedef ::std::basic_streambuf<Ch, Tr> * aspect_type;
explicit basic_ios_rdbuf_saver( state_type &s )
: s_save_( s ), a_save_( s.rdbuf() )
{}
basic_ios_rdbuf_saver( state_type &s, aspect_type const &a )
: s_save_( s ), a_save_( s.rdbuf(a) )
{}
~basic_ios_rdbuf_saver()
{ this->restore(); }
void restore()
{ s_save_.rdbuf( a_save_ ); }
private:
state_type & s_save_;
aspect_type const a_save_;
};
template < typename Ch, class Tr >
class basic_ios_fill_saver
{
public:
typedef ::std::basic_ios<Ch, Tr> state_type;
typedef typename state_type::char_type aspect_type;
explicit basic_ios_fill_saver( state_type &s )
: s_save_( s ), a_save_( s.fill() )
{}
basic_ios_fill_saver( state_type &s, aspect_type const &a )
: s_save_( s ), a_save_( s.fill(a) )
{}
~basic_ios_fill_saver()
{ this->restore(); }
void restore()
{ s_save_.fill( a_save_ ); }
private:
state_type & s_save_;
aspect_type const a_save_;
};
#ifndef BOOST_NO_STD_LOCALE
template < typename Ch, class Tr >
class basic_ios_locale_saver
{
public:
typedef ::std::basic_ios<Ch, Tr> state_type;
typedef ::std::locale aspect_type;
explicit basic_ios_locale_saver( state_type &s )
: s_save_( s ), a_save_( s.getloc() )
{}
basic_ios_locale_saver( state_type &s, aspect_type const &a )
: s_save_( s ), a_save_( s.imbue(a) )
{}
~basic_ios_locale_saver()
{ this->restore(); }
void restore()
{ s_save_.imbue( a_save_ ); }
private:
state_type & s_save_;
aspect_type const a_save_;
};
#endif
// User-defined stream state saver class declarations ----------------------//
class ios_iword_saver
{
public:
typedef ::std::ios_base state_type;
typedef int index_type;
typedef long aspect_type;
explicit ios_iword_saver( state_type &s, index_type i )
: s_save_( s ), a_save_( s.iword(i) ), i_save_( i )
{}
ios_iword_saver( state_type &s, index_type i, aspect_type const &a )
: s_save_( s ), a_save_( s.iword(i) ), i_save_( i )
{ s.iword(i) = a; }
~ios_iword_saver()
{ this->restore(); }
void restore()
{ s_save_.iword( i_save_ ) = a_save_; }
private:
state_type & s_save_;
aspect_type const a_save_;
index_type const i_save_;
ios_iword_saver& operator=(const ios_iword_saver&);
};
class ios_pword_saver
{
public:
typedef ::std::ios_base state_type;
typedef int index_type;
typedef void * aspect_type;
explicit ios_pword_saver( state_type &s, index_type i )
: s_save_( s ), a_save_( s.pword(i) ), i_save_( i )
{}
ios_pword_saver( state_type &s, index_type i, aspect_type const &a )
: s_save_( s ), a_save_( s.pword(i) ), i_save_( i )
{ s.pword(i) = a; }
~ios_pword_saver()
{ this->restore(); }
void restore()
{ s_save_.pword( i_save_ ) = a_save_; }
private:
state_type & s_save_;
aspect_type const a_save_;
index_type const i_save_;
ios_pword_saver operator=(const ios_pword_saver&);
};
// Combined stream state saver class (template) declarations ---------------//
class ios_base_all_saver
{
public:
typedef ::std::ios_base state_type;
explicit ios_base_all_saver( state_type &s )
: s_save_( s ), a1_save_( s.flags() ), a2_save_( s.precision() )
, a3_save_( s.width() )
{}
~ios_base_all_saver()
{ this->restore(); }
void restore()
{
s_save_.width( a3_save_ );
s_save_.precision( a2_save_ );
s_save_.flags( a1_save_ );
}
private:
state_type & s_save_;
state_type::fmtflags const a1_save_;
::std::streamsize const a2_save_;
::std::streamsize const a3_save_;
ios_base_all_saver& operator=(const ios_base_all_saver&);
};
template < typename Ch, class Tr >
class basic_ios_all_saver
{
public:
typedef ::std::basic_ios<Ch, Tr> state_type;
explicit basic_ios_all_saver( state_type &s )
: s_save_( s ), a1_save_( s.flags() ), a2_save_( s.precision() )
, a3_save_( s.width() ), a4_save_( s.rdstate() )
, a5_save_( s.exceptions() ), a6_save_( s.tie() )
, a7_save_( s.rdbuf() ), a8_save_( s.fill() )
#ifndef BOOST_NO_STD_LOCALE
, a9_save_( s.getloc() )
#endif
{}
~basic_ios_all_saver()
{ this->restore(); }
void restore()
{
#ifndef BOOST_NO_STD_LOCALE
s_save_.imbue( a9_save_ );
#endif
s_save_.fill( a8_save_ );
s_save_.rdbuf( a7_save_ );
s_save_.tie( a6_save_ );
s_save_.exceptions( a5_save_ );
s_save_.clear( a4_save_ );
s_save_.width( a3_save_ );
s_save_.precision( a2_save_ );
s_save_.flags( a1_save_ );
}
private:
state_type & s_save_;
typename state_type::fmtflags const a1_save_;
::std::streamsize const a2_save_;
::std::streamsize const a3_save_;
typename state_type::iostate const a4_save_;
typename state_type::iostate const a5_save_;
::std::basic_ostream<Ch, Tr> * const a6_save_;
::std::basic_streambuf<Ch, Tr> * const a7_save_;
typename state_type::char_type const a8_save_;
#ifndef BOOST_NO_STD_LOCALE
::std::locale const a9_save_;
#endif
};
class ios_all_word_saver
{
public:
typedef ::std::ios_base state_type;
typedef int index_type;
ios_all_word_saver( state_type &s, index_type i )
: s_save_( s ), i_save_( i ), a1_save_( s.iword(i) )
, a2_save_( s.pword(i) )
{}
~ios_all_word_saver()
{ this->restore(); }
void restore()
{
s_save_.pword( i_save_ ) = a2_save_;
s_save_.iword( i_save_ ) = a1_save_;
}
private:
state_type & s_save_;
index_type const i_save_;
long const a1_save_;
void * const a2_save_;
ios_all_word_saver& operator=(const ios_all_word_saver&);
};
} // namespace io
} // namespace boost
#endif // BOOST_IO_IOS_STATE_HPP