gcc/libstdc++-v3/include/std/iomanip

// Standard stream manipulators -*- C++ -*-

// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
// 2006, 2007, 2008, 2009, 2010
// 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 3, 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.

// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
// <http://www.gnu.org/licenses/>.

/** @file include/iomanip
 *  This is a Standard C++ Library header.
 */

//
// ISO C++ 14882: 27.6.3  Standard manipulators
//

#ifndef _GLIBCXX_IOMANIP
#define _GLIBCXX_IOMANIP 1

#pragma GCC system_header

#include <bits/c++config.h>
#include <iosfwd>
#include <bits/ios_base.h>

#ifdef __GXX_EXPERIMENTAL_CXX0X__
#include <locale>
#endif

namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION

  // [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)
  { return { __mask }; }

  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)
  { return { __mask }; }

  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)
  { return { __base }; }

  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)
    { return { __c }; }

  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)
  { return { __n }; }

  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)
  { return { __n }; }

  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; 
    }

#ifdef __GXX_EXPERIMENTAL_CXX0X__
  
  template<typename _MoneyT>
    struct _Get_money { _MoneyT& _M_mon; bool _M_intl; };

  /**
   *  @brief  Extended manipulator for extracting money.
   *  @param  __mon  Either long double or a specialization of @c basic_string.
   *  @param  __intl A bool indicating whether international format 
   *                 is to be used.
   *
   *  Sent to a stream object, this manipulator extracts @a __mon.
  */
  template<typename _MoneyT>
    inline _Get_money<_MoneyT>
    get_money(_MoneyT& __mon, bool __intl = false)
    { return { __mon, __intl }; }

  template<typename _CharT, typename _Traits, typename _MoneyT>
    basic_istream<_CharT, _Traits>&
    operator>>(basic_istream<_CharT, _Traits>& __is, _Get_money<_MoneyT> __f)
    {
      typedef istreambuf_iterator<_CharT, _Traits> _Iter;
      typedef money_get<_CharT, _Iter> _MoneyGet;
      
      ios_base::iostate __err = ios_base::goodbit;
      const _MoneyGet& __mg = use_facet<_MoneyGet>(__is.getloc());

      __mg.get(_Iter(__is.rdbuf()), _Iter(), __f._M_intl,
	       __is, __err, __f._M_mon);

      if (ios_base::goodbit != __err)
	__is.setstate(__err);

      return __is; 
    }


  template<typename _MoneyT>
    struct _Put_money { const _MoneyT& _M_mon; bool _M_intl; };

  /**
   *  @brief  Extended manipulator for inserting money.
   *  @param  __mon  Either long double or a specialization of @c basic_string.
   *  @param  __intl A bool indicating whether international format 
   *                 is to be used.
   *
   *  Sent to a stream object, this manipulator inserts @a __mon.
  */
  template<typename _MoneyT>
    inline _Put_money<_MoneyT>
    put_money(const _MoneyT& __mon, bool __intl = false)
    { return { __mon, __intl }; }

  template<typename _CharT, typename _Traits, typename _MoneyT>
    basic_ostream<_CharT, _Traits>& 
    operator<<(basic_ostream<_CharT, _Traits>& __os, _Put_money<_MoneyT> __f)
    {
      typedef ostreambuf_iterator<_CharT, _Traits> _Iter;
      typedef money_put<_CharT, _Iter> _MoneyPut;
      
      const _MoneyPut& __mp = use_facet<_MoneyPut>(__os.getloc());
      const _Iter __end = __mp.put(_Iter(__os.rdbuf()), __f._M_intl,
				   __os, __os.fill(), __f._M_mon);

      if (__end.failed())
	__os.setstate(ios_base::badbit);

      return __os; 
    }

#endif

  // 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

_GLIBCXX_END_NAMESPACE_VERSION
} // namespace

#endif /* _GLIBCXX_IOMANIP */