smanip(3C++) - smanip(3C++)
Standard C++ Library Copyright 1998, Rogue Wave Software, Inc.
NAME
smanip, smanip_fill
- Helper classes used to implement parameterized manipulators.
SYNOPSIS
#include <iomanip>
template<class T> class smanip;
template<class T, class traits> class smanip_fill;
DESCRIPTION
The template classes smanip and smanip_fill_are helper classes used to
implement parameterized manipulators. The class smanip_is used as the
return type for manipulators that do not need to carry information
about the character type of the stream they are applied to. This is the
case for resetiosflags, setiosflags, setbase, setprecision, and setw.
The class smanip_fill_is used as the return type for manipulators that
do need to carry information about the character type of the streamto
which they are applied. This is the case for setfill.
smanip_fill is not described in the C++ standard, and is included as an
extension.
INTERFACE
template<class T>
class smanip {
public:
smanip(ios_base& (*pf) (ios_base&, T), T manarg);
};
template<;class T, class traits>
class smanip_fill{
public:
smanip_fill(basic_ios<T, traits>& (*pf)
(basic_ios<T, traits>&, T), T manarg);
};
// parameterized manipulators
smanip<;ios_base::fmtflags>
resetiosflag(ios_base::fmtflags mask);
smanip<;ios_base::fmtflags>
setiosflag(ios_base::fmtflags mask);
smanip<;int> setbase(int base);
smanip<;int> setprecision(int n);
smanip<;int> setw(int n);
template <;class charT>
smanip_fill<;charT, char_traits<charT> > setfill(charT c);
// overloaded extractors
template <;class charT, class traits, class T>
basic_istream<;charT,traits>&
operator>>(basic_istream<charT,traits>& is,
const smanip<T>& a);
template <;class charT, class traits>
basic_istream<;charT,traits>&
operator>>(basic_istream<charT,traits>& is,
const smanip_fill<charT,char_traits<charT> >& a);
// overloaded inserters
template <;class charT, class traits, class T>
basic_ostream<;charT,traits>&
operator<;<(basic_ostream<charT,traits>& is,
const smanip<T>& a);
template <;class charT, class traits>
basic_ostream<;charT,traits>&
operator>>(basic_ostream<charT,traits>& is,
const smanip_fill<;charT,char_traits<charT> >& a);
CLASS SMANIP CONSTRUCTOR
smanip(ios_base& (*pf) (ios_base&, T), T manarg);
Constructs an object of class smanip that stores a function pointer pf that
is called with argument manarg, in order to perform the manipulator task.
The call to pf is performed in the inserter or extractor overloaded on type
smanip.
CLASS SMANIP_FILL CONSTRUCTOR
smanip_fill(basic_ios<T, traits>& (*pf) (basic_ios<T, traits>&, T), T
manarg);
Constructs an object of class smanip_fill that stores a function pointer
pf, that is called with argument manarg, in order to perform the manipula‐
tor task. The call to pf is performed in the inserter or extractor over‐
loaded on type smanip_fill.
MANIPULATORS
smanip<ios_base::fmtflags>
resetiosflag(ios_base::fmtflags mask);
Resets the ios_base::fmtflags designated by mask in the stream to which it
is applied.
smanip<;int>
setbase(int base);
Sets the base for the output or input of integer values in the stream to
which it is applied. The valid values for mask are 8, 10, 16.
template <;class charT>
smanip_fill<;charT, char_traits<charT> >
setfill(charT c);
Sets the fill character in the stream to which it is applied.
smanip<;ios_base::fmtflags>
setiosflag(ios_base::fmtflags mask);
Sets the ios_base::fmtflags designated by mask in the stream to which it is
applied.
smanip<;int>
setprecision(int n);
Sets the precision for the output of floating point values in the stream to
which it is applied.
smanip<;int>
setw(int n);
Set the field width in the stream to which it is applied.
EXTRACTORS
template <class charT, class traits, class T>
basic_istream<charT,traits>&
operator>>(basic_istream<charT,traits>& is, const smanip<T>& a);
Applies the function stored in the parameter of type smanip<T>, on the
stream is.
template <;class charT, class traits>
basic_istream<;charT,traits>&
operator>>(basic_istream<charT,traits>& is,
const smanip_fill<charT,char_traits<charT> >& a);
Applies the function stored in the parameter of type smanip_fill<charT,
char_traits<charT> > on the stream is.
INSERTERStemplate <;class charT, class traits, class T>
basic_ostream<;charT,traits>&
operator<;<(basic_ostream<charT,traits>& os,
const smanip<T>& a);
Applies the function stored in the parameter of type smanip<T> on the
stream os.
template <;class charT, class traits>
basic_ostream<;charT,traits>&
operator<;<(basic_ostream<charT,traits>& os,
const smanip_fill<charT,char_traits<charT> >& a);
Applies the function stored in the parameter of type smanip_fill<charT,
char_traits<charT> > on the stream os.
SEE ALSO
ios_base(3C++), basic_ios(3C++), basic_istream(3C++),
basic_ostream(3C++)
Working Paper for Draft Proposed International Standard for Information
Systems--Programming Language C++, Section 27.6.3
STANDARDS CONFORMANCE
ANSI X3J16/ISO WG21 Joint C++ Committee
Rogue Wave Software 02 Apr 1998 smanip(3C++)
