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iomanip
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1993-12-07
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// -*- C++ -*-
// This is part of the iostream library, providing parametrized manipulators
// Written by Heinz G. Seidl, Copyright (C) 1992 Cygnus Support
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, 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
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free
// Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#ifndef _IOMANIP_H
//
// Not specifying `pragma interface' causes the compiler to emit the
// template definitions in the files, where they are used.
//
#ifdef __GNUG__
#pragma interface
#endif
#define _IOMANIP_H
#include "_G_config.h"
#include "iostream.h"
#ifndef _G_NO_TEMPLATES
//-----------------------------------------------------------------------------
// Parametrized Manipulators as specified by ANSI draft
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// Stream Manipulators
//-----------------------------------------------------------------------------
//
template<class TP> class smanip; // TP = Type Param
template<class TP> class sapp {
ios& (*_f)(ios&, TP);
public:
sapp(ios& (*f)(ios&, TP)) : _f(f) {}
//
smanip<TP> operator()(TP a)
{ return smanip<TP>(_f, a); }
};
template<class TP> class smanip {
ios& (*_f)(ios&, TP);
TP _a;
public:
smanip(ios& (*f)(ios&, TP), TP a) : _f(f), _a(a) {}
//
friend
istream& operator>>(istream& i, const smanip<TP>& m);
friend
ostream& operator<<(ostream& o, const smanip<TP>& m);
};
template<class TP>
inline istream& operator>>(istream& i, const smanip<TP>& m)
{ m._f(i, m._a); return i; }
template<class TP>
inline ostream& operator<<(ostream& o, const smanip<TP>& m)
{ m._f(o, m._a); return o;}
//-----------------------------------------------------------------------------
// Input-Stream Manipulators
//-----------------------------------------------------------------------------
//
template<class TP> class imanip;
template<class TP> class iapp {
istream& (*_f)(istream&, TP);
public:
iapp(ostream& (*f)(istream&,TP)) : _f(f) {}
//
imanip<TP> operator()(TP a)
{ return imanip<TP>(_f, a); }
};
template<class TP> class imanip {
istream& (*_f)(istream&, TP);
TP _a;
public:
imanip(istream& (*f)(istream&, TP), TP a) : _f(f), _a(a) {}
//
friend
istream& operator>>(istream& i, const imanip<TP>& m)
{ return m._f( i, m._a); }
};
//-----------------------------------------------------------------------------
// Output-Stream Manipulators
//-----------------------------------------------------------------------------
//
template<class TP> class omanip;
template<class TP> class oapp {
ostream& (*_f)(ostream&, TP);
public:
oapp(ostream& (*f)(ostream&,TP)) : _f(f) {}
//
omanip<TP> operator()(TP a)
{ return omanip<TP>(_f, a); }
};
template<class TP> class omanip {
ostream& (*_f)(ostream&, TP);
TP _a;
public:
omanip(ostream& (*f)(ostream&, TP), TP a) : _f(f), _a(a) {}
//
friend
ostream& operator<<(ostream& i, omanip<TP>& m)
{ return m._f( i, m._a); }
};
//-----------------------------------------------------------------------------
// Available Manipulators
//-----------------------------------------------------------------------------
//
// Macro to define an iomanip function, with one argument
// The underlying function is `__iomanip_<name>'
//
#define __DEFINE_IOMANIP_FN1(type,param,function) \
extern ios& __iomanip_##function (ios&, param); \
inline type<param> function (param n) \
{ return type<param> (__iomanip_##function, n); }
__DEFINE_IOMANIP_FN1( smanip, int, setbase)
__DEFINE_IOMANIP_FN1( smanip, int, setfill)
__DEFINE_IOMANIP_FN1( smanip, int, setprecision)
__DEFINE_IOMANIP_FN1( smanip, int, setw)
__DEFINE_IOMANIP_FN1( smanip, ios::fmtflags, resetiosflags)
__DEFINE_IOMANIP_FN1( smanip, ios::fmtflags, setiosflags)
#endif /*!_G_NO_TEMPLATES*/
#endif /*!_IOMANIP_H*/