# std::num_put< _CharT, _OutIter > Class Template Reference

Inheritance diagram for std::num_put< _CharT, _OutIter >:

List of all members.

## Detailed Description

### template<typename _CharT, typename _OutIter>
class std::num_put< _CharT, _OutIter >

This facet encapsulates the code to convert a number to a string. It is used by the ostream numeric insertion operators.

The num_put template uses protected virtual functions to provide the actual results. The public accessors forward the call to the virtual functions. These virtual functions are hooks for developers to implement the behavior they require from the num_put facet.

Definition at line 2263 of file locale_facets.h.

## Public Types

- typedef _CharT char_type
- typedef _OutIter iter_type

## Public Member Functions

- num_put (size_t __refs=0)
- iter_type put (iter_type __s, ios_base &__f, char_type __fill, const void *__v) const
- iter_type put (iter_type __s, ios_base &__f, char_type __fill, bool __v) const

- iter_type put (iter_type __s, ios_base &__f, char_type __fill, long double __v) const
- iter_type put (iter_type __s, ios_base &__f, char_type __fill, double __v) const

- iter_type put (iter_type __s, ios_base &__f, char_type __fill, unsigned long long __v) const
- iter_type put (iter_type __s, ios_base &__f, char_type __fill, long long __v) const
- iter_type put (iter_type __s, ios_base &__f, char_type __fill, unsigned long __v) const
- iter_type put (iter_type __s, ios_base &__f, char_type __fill, long __v) const

## Static Public Attributes

- static locale::id id

## Protected Member Functions

- void _M_group_float (const char *__grouping, size_t __grouping_size, char_type __sep, const char_type *__p, char_type *__new, char_type *__cs, int &__len) const
- void _M_group_int (const char *__grouping, size_t __grouping_size, char_type __sep, ios_base &__io, char_type *__new, char_type *__cs, int &__len) const
- template<typename _ValueT> iter_type _M_insert_float (iter_type, ios_base &__io, char_type __fill, char __mod, _ValueT __v) const
- template<typename _ValueT> iter_type _M_insert_int (iter_type, ios_base &__io, char_type __fill, _ValueT __v) const
- void _M_pad (char_type __fill, streamsize __w, ios_base &__io, char_type *__new, const char_type *__cs, int &__len) const
- virtual ~num_put ()

- virtual iter_type do_put (iter_type, ios_base &, char_type __fill, const void *__v) const
- virtual iter_type do_put (iter_type, ios_base &, char_type __fill, long double __v) const
- virtual iter_type do_put (iter_type, ios_base &, char_type __fill, double __v) const
- virtual iter_type do_put (iter_type, ios_base &, char_type __fill, unsigned long long) const
- virtual iter_type do_put (iter_type, ios_base &, char_type __fill, long long __v) const
- virtual iter_type do_put (iter_type, ios_base &, char_type __fill, unsigned long) const
- virtual iter_type do_put (iter_type, ios_base &, char_type __fill, long __v) const
- virtual iter_type do_put (iter_type, ios_base &, char_type __fill, bool __v) const

## Static Protected Member Functions

- static __c_locale _S_clone_c_locale (__c_locale &__cloc)
- static void _S_create_c_locale (__c_locale &__cloc, const char *__s, __c_locale __old=0)
- static void _S_destroy_c_locale (__c_locale &__cloc)
- static __c_locale _S_get_c_locale ()
- static const char * _S_get_c_name ()

## Friends

- class locale::_Impl

## Member Typedef Documentation

template<typename _CharT, typename _OutIter>

typedef _CharT std::num_put< _CharT, _OutIter >::char_type

Public typedefs.

Definition at line 2269 of file locale_facets.h.

template<typename _CharT, typename _OutIter>

typedef _OutIter std::num_put< _CharT, _OutIter >::iter_type

Public typedefs.

Definition at line 2270 of file locale_facets.h.

## Constructor & Destructor Documentation

template<typename _CharT, typename _OutIter>

std::num_put< _CharT, _OutIter >::num_put | ( | size_t | __refs = `0` | ) | `[inline, explicit]`

Constructor performs initialization.

This is the constructor provided by the standard.

Parameters:

  | refs | Passed to the base facet class.

Definition at line 2284 of file locale_facets.h.

template<typename _CharT, typename _OutIter>

virtual std::num_put< _CharT, _OutIter >::~num_put | ( |  | ) | `[inline, protected, virtual]`

Destructor.

Definition at line 2463 of file locale_facets.h.

## Member Function Documentation

template<typename _CharT, typename _OutIter>

_OutIter std::num_put< _CharT, _OutIter >::do_put | ( | iter_type | ,
|  | ios_base & | ,
|  | char_type | __fill,
|  | bool | __v |
| ) |  |  | const`[protected, virtual]`

Numeric formatting.

These functions do the work of formatting numeric values and inserting them into a stream. This function is a hook for derived classes to change the value returned.

Parameters:

  | s | Stream to write to.
  | io | Source of locale and flags.
  | fill | Char_type to use for filling.
  | v | Value to format and insert.

Returns:
  Iterator after writing.

Definition at line 1214 of file locale_facets.tcc.

References std::__write(), std::ios_base::_M_getloc(), std::num_put< _CharT, _OutIter >::_M_insert_int(), std::num_put< _CharT, _OutIter >::_M_pad(), std::ios_base::boolalpha, std::ios_base::flags(), and std::ios_base::width().

Referenced by std::num_put< _CharT, _OutIter >::put().

template<typename _CharT, typename _OutIter>

iter_type std::num_put< _CharT, _OutIter >::put | ( | iter_type | __s,
|  | ios_base & | __f,
|  | char_type | __fill,
|  | const void * | __v |
| ) |  |  | const`[inline]`

Numeric formatting.

Formats the pointer value v and inserts it into a stream. It does so by calling num_put::do_put().

This function formats v as an unsigned long with ios_base::hex and ios_base::showbase set.

Parameters:

  | s | Stream to write to.
  | io | Source of locale and flags.
  | fill | Char_type to use for filling.
  | v | Value to format and insert.

Returns:
  Iterator after writing.

Definition at line 2432 of file locale_facets.h.

References std::num_put< _CharT, _OutIter >::do_put().

template<typename _CharT, typename _OutIter>

iter_type std::num_put< _CharT, _OutIter >::put | ( | iter_type | __s,
|  | ios_base & | __f,
|  | char_type | __fill,
|  | double | __v |
| ) |  |  | const`[inline]`

Numeric formatting.

Formats the floating point value v and inserts it into a stream. It does so by calling num_put::do_put().

Formatting is affected by the flag settings in io.

The basic format is affected by the value of io.flags() & ios_base::floatfield. If equal to ios_base::fixed, formats like the printf f specifier. Else if equal to ios_base::scientific, formats like e or E with ios_base::uppercase unset or set respectively. Otherwise, formats like g or G depending on uppercase. Note that if both fixed and scientific are set, the effect will also be like g or G.

The output precision is given by io.precision(). This precision is capped at numeric_limits::digits10 + 2 (different for double and long double). The default precision is 6.

If ios_base::showpos is set, '+' is output before positive values. If ios_base::showpoint is set, a decimal point will always be output.

Thousands separators are inserted according to numpunct::grouping() and numpunct::thousands_sep(). The decimal point character used is numpunct::decimal_point().

If io.width() is non-zero, enough fill characters are inserted to make the result at least that wide. If (io.flags() & ios_base::adjustfield) == ios_base::left, result is padded at the end. If ios_base::internal, then padding occurs immediately after either a '+' or '-' or after '0x' or '0X'. Otherwise, padding occurs at the beginning.

Parameters:

  | s | Stream to write to.
  | io | Source of locale and flags.
  | fill | Char_type to use for filling.
  | v | Value to format and insert.

Returns:
  Iterator after writing.

Definition at line 2407 of file locale_facets.h.

References std::num_put< _CharT, _OutIter >::do_put().

template<typename _CharT, typename _OutIter>

iter_type std::num_put< _CharT, _OutIter >::put | ( | iter_type | __s,
|  | ios_base & | __f,
|  | char_type | __fill,
|  | long | __v |
| ) |  |  | const`[inline]`

Numeric formatting.

Formats the integral value v and inserts it into a stream. It does so by calling num_put::do_put().

Formatting is affected by the flag settings in io.

The basic format is affected by the value of io.flags() & ios_base::basefield. If equal to ios_base::oct, formats like the printf o specifier. Else if equal to ios_base::hex, formats like x or X with ios_base::uppercase unset or set respectively. Otherwise, formats like d, ld, lld for signed and u, lu, llu for unsigned values. Note that if both oct and hex are set, neither will take effect.

If ios_base::showpos is set, '+' is output before positive values. If ios_base::showbase is set, '0' precedes octal values (except 0) and '0[xX]' precedes hex values.

Thousands separators are inserted according to numpunct::grouping() and numpunct::thousands_sep(). The decimal point character used is numpunct::decimal_point().

If io.width() is non-zero, enough fill characters are inserted to make the result at least that wide. If (io.flags() & ios_base::adjustfield) == ios_base::left, result is padded at the end. If ios_base::internal, then padding occurs immediately after either a '+' or '-' or after '0x' or '0X'. Otherwise, padding occurs at the beginning.

Parameters:

  | s | Stream to write to.
  | io | Source of locale and flags.
  | fill | Char_type to use for filling.
  | v | Value to format and insert.

Returns:
  Iterator after writing.

Definition at line 2344 of file locale_facets.h.

References std::num_put< _CharT, _OutIter >::do_put().

template<typename _CharT, typename _OutIter>

iter_type std::num_put< _CharT, _OutIter >::put | ( | iter_type | __s,
|  | ios_base & | __f,
|  | char_type | __fill,
|  | bool | __v |
| ) |  |  | const`[inline]`

Numeric formatting.

Formats the boolean v and inserts it into a stream. It does so by calling num_put::do_put().

If ios_base::boolalpha is set, writes ctype<CharT>::truename() or ctype<CharT>::falsename(). Otherwise formats v as an int.

Parameters:

  | s | Stream to write to.
  | io | Source of locale and flags.
  | fill | Char_type to use for filling.
  | v | Value to format and insert.

Returns:
  Iterator after writing.

Definition at line 2302 of file locale_facets.h.

References std::num_put< _CharT, _OutIter >::do_put().

Referenced by std::basic_ostream< _CharT, _Traits >::_M_insert().

## Member Data Documentation

template<typename _CharT, typename _OutIter>

locale::id std::num_put< _CharT, _OutIter >::id `[static]`

Numpunct facet id.

Definition at line 2274 of file locale_facets.h.

The documentation for this class was generated from the following files:

- locale_facets.h
- locale_facets.tcc