freebsd-dev/contrib/libstdc++/include/std/std_iomanip.h
2004-07-28 03:12:05 +00:00

301 lines
8.9 KiB
C++

// Standard stream manipulators -*- C++ -*-
// Copyright (C) 1997, 1998, 1999, 2001, 2002, 2003
// Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 2, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING. If not, write to the Free
// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.
// As a special exception, you may use this file as part of a free software
// library without restriction. Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License. This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.
//
// ISO C++ 14882: 27.6.3 Standard manipulators
//
/** @file iomanip
* This is a Standard C++ Library header. You should @c #include this header
* in your programs, rather than any of the "st[dl]_*.h" implementation files.
*/
#ifndef _GLIBCXX_IOMANIP
#define _GLIBCXX_IOMANIP 1
#pragma GCC system_header
#include <bits/c++config.h>
#include <istream>
#include <functional>
namespace std
{
// [27.6.3] standard manipulators
// Also see DR 183.
struct _Resetiosflags { ios_base::fmtflags _M_mask; };
/**
* @brief Manipulator for @c setf.
* @param mask A format flags mask.
*
* Sent to a stream object, this manipulator resets the specified flags,
* via @e stream.setf(0,mask).
*/
inline _Resetiosflags
resetiosflags(ios_base::fmtflags __mask)
{
_Resetiosflags __x;
__x._M_mask = __mask;
return __x;
}
template<typename _CharT, typename _Traits>
inline basic_istream<_CharT,_Traits>&
operator>>(basic_istream<_CharT,_Traits>& __is, _Resetiosflags __f)
{
__is.setf(ios_base::fmtflags(0), __f._M_mask);
return __is;
}
template<typename _CharT, typename _Traits>
inline basic_ostream<_CharT,_Traits>&
operator<<(basic_ostream<_CharT,_Traits>& __os, _Resetiosflags __f)
{
__os.setf(ios_base::fmtflags(0), __f._M_mask);
return __os;
}
struct _Setiosflags { ios_base::fmtflags _M_mask; };
/**
* @brief Manipulator for @c setf.
* @param mask A format flags mask.
*
* Sent to a stream object, this manipulator sets the format flags
* to @a mask.
*/
inline _Setiosflags
setiosflags(ios_base::fmtflags __mask)
{
_Setiosflags __x;
__x._M_mask = __mask;
return __x;
}
template<typename _CharT, typename _Traits>
inline basic_istream<_CharT,_Traits>&
operator>>(basic_istream<_CharT,_Traits>& __is, _Setiosflags __f)
{
__is.setf(__f._M_mask);
return __is;
}
template<typename _CharT, typename _Traits>
inline basic_ostream<_CharT,_Traits>&
operator<<(basic_ostream<_CharT,_Traits>& __os, _Setiosflags __f)
{
__os.setf(__f._M_mask);
return __os;
}
struct _Setbase { int _M_base; };
/**
* @brief Manipulator for @c setf.
* @param base A numeric base.
*
* Sent to a stream object, this manipulator changes the
* @c ios_base::basefield flags to @c oct, @c dec, or @c hex when @a base
* is 8, 10, or 16, accordingly, and to 0 if @a base is any other value.
*/
inline _Setbase
setbase(int __base)
{
_Setbase __x;
__x._M_base = __base;
return __x;
}
template<typename _CharT, typename _Traits>
inline basic_istream<_CharT,_Traits>&
operator>>(basic_istream<_CharT,_Traits>& __is, _Setbase __f)
{
__is.setf(__f._M_base == 8 ? ios_base::oct :
__f._M_base == 10 ? ios_base::dec :
__f._M_base == 16 ? ios_base::hex :
ios_base::fmtflags(0), ios_base::basefield);
return __is;
}
template<typename _CharT, typename _Traits>
inline basic_ostream<_CharT,_Traits>&
operator<<(basic_ostream<_CharT,_Traits>& __os, _Setbase __f)
{
__os.setf(__f._M_base == 8 ? ios_base::oct :
__f._M_base == 10 ? ios_base::dec :
__f._M_base == 16 ? ios_base::hex :
ios_base::fmtflags(0), ios_base::basefield);
return __os;
}
template<typename _CharT>
struct _Setfill { _CharT _M_c; };
/**
* @brief Manipulator for @c fill.
* @param c The new fill character.
*
* Sent to a stream object, this manipulator calls @c fill(c) for that
* object.
*/
template<typename _CharT>
inline _Setfill<_CharT>
setfill(_CharT __c)
{
_Setfill<_CharT> __x;
__x._M_c = __c;
return __x;
}
template<typename _CharT, typename _Traits>
inline basic_istream<_CharT,_Traits>&
operator>>(basic_istream<_CharT,_Traits>& __is, _Setfill<_CharT> __f)
{
__is.fill(__f._M_c);
return __is;
}
template<typename _CharT, typename _Traits>
inline basic_ostream<_CharT,_Traits>&
operator<<(basic_ostream<_CharT,_Traits>& __os, _Setfill<_CharT> __f)
{
__os.fill(__f._M_c);
return __os;
}
struct _Setprecision { int _M_n; };
/**
* @brief Manipulator for @c precision.
* @param n The new precision.
*
* Sent to a stream object, this manipulator calls @c precision(n) for
* that object.
*/
inline _Setprecision
setprecision(int __n)
{
_Setprecision __x;
__x._M_n = __n;
return __x;
}
template<typename _CharT, typename _Traits>
inline basic_istream<_CharT,_Traits>&
operator>>(basic_istream<_CharT,_Traits>& __is, _Setprecision __f)
{
__is.precision(__f._M_n);
return __is;
}
template<typename _CharT, typename _Traits>
inline basic_ostream<_CharT,_Traits>&
operator<<(basic_ostream<_CharT,_Traits>& __os, _Setprecision __f)
{
__os.precision(__f._M_n);
return __os;
}
struct _Setw { int _M_n; };
/**
* @brief Manipulator for @c width.
* @param n The new width.
*
* Sent to a stream object, this manipulator calls @c width(n) for
* that object.
*/
inline _Setw
setw(int __n)
{
_Setw __x;
__x._M_n = __n;
return __x;
}
template<typename _CharT, typename _Traits>
inline basic_istream<_CharT,_Traits>&
operator>>(basic_istream<_CharT,_Traits>& __is, _Setw __f)
{
__is.width(__f._M_n);
return __is;
}
template<typename _CharT, typename _Traits>
inline basic_ostream<_CharT,_Traits>&
operator<<(basic_ostream<_CharT,_Traits>& __os, _Setw __f)
{
__os.width(__f._M_n);
return __os;
}
// Inhibit implicit instantiations for required instantiations,
// which are defined via explicit instantiations elsewhere.
// NB: This syntax is a GNU extension.
#if _GLIBCXX_EXTERN_TEMPLATE
extern template ostream& operator<<(ostream&, _Setfill<char>);
extern template ostream& operator<<(ostream&, _Setiosflags);
extern template ostream& operator<<(ostream&, _Resetiosflags);
extern template ostream& operator<<(ostream&, _Setbase);
extern template ostream& operator<<(ostream&, _Setprecision);
extern template ostream& operator<<(ostream&, _Setw);
extern template istream& operator>>(istream&, _Setfill<char>);
extern template istream& operator>>(istream&, _Setiosflags);
extern template istream& operator>>(istream&, _Resetiosflags);
extern template istream& operator>>(istream&, _Setbase);
extern template istream& operator>>(istream&, _Setprecision);
extern template istream& operator>>(istream&, _Setw);
#ifdef _GLIBCXX_USE_WCHAR_T
extern template wostream& operator<<(wostream&, _Setfill<wchar_t>);
extern template wostream& operator<<(wostream&, _Setiosflags);
extern template wostream& operator<<(wostream&, _Resetiosflags);
extern template wostream& operator<<(wostream&, _Setbase);
extern template wostream& operator<<(wostream&, _Setprecision);
extern template wostream& operator<<(wostream&, _Setw);
extern template wistream& operator>>(wistream&, _Setfill<wchar_t>);
extern template wistream& operator>>(wistream&, _Setiosflags);
extern template wistream& operator>>(wistream&, _Resetiosflags);
extern template wistream& operator>>(wistream&, _Setbase);
extern template wistream& operator>>(wistream&, _Setprecision);
extern template wistream& operator>>(wistream&, _Setw);
#endif
#endif
} // namespace std
#endif /* _GLIBCXX_IOMANIP */