libstdc++-v3/include/bits/std_iomanip.h

   1 // Standard stream manipulators -*- C++ -*-
   2
   3 // Copyright (C) 1997-1999, 2001 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 2, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING.  If not, write to the Free
  18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  19 // USA.
  20
  21 // As a special exception, you may use this file as part of a free software
  22 // library without restriction.  Specifically, if other files instantiate
  23 // templates or use macros or inline functions from this file, or you compile
  24 // this file and link it with other files to produce an executable, this
  25 // file does not by itself cause the resulting executable to be covered by
  26 // the GNU General Public License.  This exception does not however
  27 // invalidate any other reasons why the executable file might be covered by
  28 // the GNU General Public License.
  29
  30 //
  31 // ISO C++ 14882: 27.6.3  Standard manipulators
  32 //
  33
  34 /** @file std_iomanip.h
  35  *  This is an internal header file, included by other library headers.
  36  *  You should not attempt to use it directly.
  37  */
  38
  39 #ifndef _CPP_IOMANIP
  40 #define _CPP_IOMANIP 1
  41
  42 #pragma GCC system_header
  43
  44 #include <bits/c++config.h>
  45 #include <bits/std_istream.h>
  46 #include <bits/std_functional.h>
  47
  48 namespace std
  49 {
  50
  51   struct _Resetiosflags { ios_base::fmtflags _M_mask; };
  52
  53   inline _Resetiosflags
  54   resetiosflags(ios_base::fmtflags __mask)
  55   {
  56     _Resetiosflags __x;
  57     __x._M_mask = __mask;
  58     return __x;
  59   }
  60
  61   template <class _CharT, class _Traits>
  62     basic_istream<_CharT,_Traits>&
  63     operator>>(basic_istream<_CharT,_Traits>& __is, _Resetiosflags __f)
  64     {
  65       __is.setf(ios_base::fmtflags(0), __f._M_mask);
  66       return __is;
  67     }
  68
  69   template <class _CharT, class _Traits>
  70     basic_ostream<_CharT,_Traits>&
  71     operator<<(basic_ostream<_CharT,_Traits>& __os, _Resetiosflags __f)
  72     {
  73       __os.setf(ios_base::fmtflags(0), __f._M_mask);
  74       return __os;
  75     }
  76
  77
  78   struct _Setiosflags { ios_base::fmtflags _M_mask; };
  79
  80   inline _Setiosflags
  81   setiosflags(ios_base::fmtflags __mask)
  82   {
  83     _Setiosflags __x;
  84     __x._M_mask = __mask;
  85     return __x;
  86   }
  87
  88   template <class _CharT, class _Traits>
  89     basic_istream<_CharT,_Traits>&
  90     operator>>(basic_istream<_CharT,_Traits>& __is, _Setiosflags __f)
  91     {
  92       __is.setf(__f._M_mask);
  93       return __is;
  94     }
  95
  96   template <class _CharT, class _Traits>
  97     basic_ostream<_CharT,_Traits>&
  98     operator<<(basic_ostream<_CharT,_Traits>& __os, _Setiosflags __f)
  99     {
 100       __os.setf(__f._M_mask);
 101       return __os;
 102     }
 103
 104
 105   struct _Setbase { int _M_base; };
 106
 107   inline _Setbase
 108   setbase(int __base)
 109   {
 110     _Setbase __x;
 111     __x._M_base = __base;
 112     return __x;
 113   }
 114
 115   template <class _CharT, class _Traits>
 116     basic_istream<_CharT,_Traits>&
 117     operator>>(basic_istream<_CharT,_Traits>& __is, _Setbase __f)
 118     {
 119       __is.setf(__f._M_base ==  8 ? ios_base::oct :
 120               __f._M_base == 10 ? ios_base::dec :
 121               __f._M_base == 16 ? ios_base::hex :
 122               ios_base::fmtflags(0), ios_base::basefield);
 123       return __is;
 124     }
 125
 126   template <class _CharT, class _Traits>
 127     basic_ostream<_CharT,_Traits>&
 128     operator<<(basic_ostream<_CharT,_Traits>& __os, _Setbase __f)
 129     {
 130       __os.setf(__f._M_base ==  8 ? ios_base::oct :
 131                 __f._M_base == 10 ? ios_base::dec :
 132                 __f._M_base == 16 ? ios_base::hex :
 133                 ios_base::fmtflags(0), ios_base::basefield);
 134       return __os;
 135     }
 136
 137
 138   template<class _CharT>
 139     struct _Setfill { _CharT _M_c; };
 140
 141   template<class _CharT>
 142     _Setfill<_CharT>
 143     setfill(_CharT __c)
 144     {
 145       _Setfill<_CharT> __x;
 146       __x._M_c = __c;
 147       return __x;
 148     }
 149
 150   template <class _CharT, class _Traits>
 151     basic_istream<_CharT,_Traits>&
 152     operator>>(basic_istream<_CharT,_Traits>& __is, _Setfill<_CharT> __f)
 153     {
 154       __is.fill(__f._M_c);
 155       return __is;
 156     }
 157
 158   template <class _CharT, class _Traits>
 159     basic_ostream<_CharT,_Traits>&
 160     operator<<(basic_ostream<_CharT,_Traits>& __os, _Setfill<_CharT> __f)
 161     {
 162       __os.fill(__f._M_c);
 163       return __os;
 164     }
 165
 166
 167   struct _Setprecision { int _M_n; };
 168
 169   inline _Setprecision
 170   setprecision(int __n)
 171   {
 172     _Setprecision __x;
 173     __x._M_n = __n;
 174     return __x;
 175   }
 176
 177   template <class _CharT, class _Traits>
 178     basic_istream<_CharT,_Traits>&
 179     operator>>(basic_istream<_CharT,_Traits>& __is, _Setprecision __f)
 180     {
 181       __is.precision(__f._M_n);
 182       return __is;
 183     }
 184
 185   template <class _CharT, class _Traits>
 186     basic_ostream<_CharT,_Traits>&
 187     operator<<(basic_ostream<_CharT,_Traits>& __os, _Setprecision __f)
 188     {
 189       __os.precision(__f._M_n);
 190       return __os;
 191     }
 192
 193
 194   struct _Setw { int _M_n; };
 195
 196   inline _Setw
 197   setw(int __n)
 198   {
 199     _Setw __x;
 200     __x._M_n = __n;
 201     return __x;
 202   }
 203
 204   template <class _CharT, class _Traits>
 205     basic_istream<_CharT,_Traits>&
 206     operator>>(basic_istream<_CharT,_Traits>& __is, _Setw __f)
 207     {
 208       __is.width(__f._M_n);
 209       return __is;
 210     }
 211
 212   template <class _CharT, class _Traits>
 213     basic_ostream<_CharT,_Traits>&
 214     operator<<(basic_ostream<_CharT,_Traits>& __os, _Setw __f)
 215     {
 216       __os.width(__f._M_n);
 217       return __os;
 218     }
 219 } // namespace std
 220
 221 #endif