man std::numpunct (Fonctions bibliothèques) - Numpunct facet.

NAME

std::numpunct - Numpunct facet.

SYNOPSIS



#include <locale>

Inherits std::locale::facet.

Inherited by std::numpunct_byname< CharT >.

Public Types

typedef numpunct_cache< CharT > cache_type



typedef CharT char_type

Public typedefs. typedef basic_string< CharT > string_type

Public typedefs.

Public Member Functions

numpunct (size_t __refs=0)

Numpunct constructor. numpunct (cache_type *cache, size_t __refs=0)

Internal constructor. Not for general use. numpunct (c_locale cloc, size_t __refs=0)

Internal constructor. Not for general use. char_type decimal_point () const

Return decimal point character. char_type thousands_sep () const

Return thousands separator character. string grouping () const

Return grouping specification. string_type truename () const

Return string representation of bool true. string_type falsename () const

Return string representation of bool false.

Static Public Attributes

static locale::id id

Numpunct facet id.

Protected Member Functions

virtual ~numpunct ()

Destructor. virtual char_type do_decimal_point () const

Return decimal point character. virtual char_type do_thousands_sep () const

Return thousands separator character. virtual string do_grouping () const

Return grouping specification. virtual string_type do_truename () const

Return string representation of bool true. virtual string_type do_falsename () const

Return string representation of bool false.

Static Protected Member Functions

static c_locale S_get_c_locale ()

static const char * S_get_c_name ()

Protected Attributes

cache_type * M_data

Friends

class locale::Impl

Detailed Description

template<typename CharT> class std::numpunct< CharT >

Numpunct facet.

This facet stores several pieces of information related to printing and scanning numbers, such as the decimal point character. It takes a template parameter specifying the char type. The numpunct facet is used by streams for many I/O operations involving numbers.

The numpunct 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 a numpunct facet.

Definition at line 1657 of file locale.

Member Typedef Documentation

template<typename CharT> typedef CharT std::numpunct< CharT >::char_type

Public typedefs.

Reimplemented in std::numpunct_byname< CharT >.

Definition at line 1663 of file locale.

template<typename CharT> typedef basic_string<CharT> std::numpunct< CharT >::string_type

Public typedefs.

Reimplemented in std::numpunct_byname< CharT >.

Definition at line 1664 of file locale.

Constructor & Destructor Documentation

template<typename CharT> std::numpunct< CharT >::numpunct (size_t __refs = 0) [inline, explicit]

Numpunct constructor.

Parameters: refs Refcount to pass to the base class.

Definition at line 1681 of file locale.

template<typename CharT> std::numpunct< CharT >::numpunct (cache_type * cache, size_t __refs = 0) [inline, explicit]

Internal constructor. Not for general use.

This is a constructor for use by the library itself to set up the predefined locale facets.

Parameters: cache numpunct_cache object.

refs Refcount to pass to the base class.

Definition at line 1694 of file locale.

template<typename CharT> std::numpunct< CharT >::numpunct (c_locale cloc, size_t __refs = 0) [inline, explicit]

Internal constructor. Not for general use.

This is a constructor for use by the library itself to set up new locales.

Parameters: cloc The 'C' locale.

refs Refcount to pass to the base class.

Definition at line 1708 of file locale.

template<typename CharT> virtual std::numpunct< CharT >::~numpunct () [protected, virtual]

Destructor.

Member Function Documentation

template<typename CharT> char_type std::numpunct< CharT >::decimal_point () const [inline]

Return decimal point character.

This function returns a char_type to use as a decimal point. It does so by returning returning numpunct<char_type>::do_decimal_point().

Returns: char_type representing a decimal point.

Definition at line 1722 of file locale.

References std::numpunct< CharT >::do_decimal_point().

Referenced by std::numpunct_cache< CharT >::M_cache().

template<typename CharT> virtual char_type std::numpunct< CharT >::do_decimal_point () const [inline, protected, virtual]

Return decimal point character.

Returns a char_type to use as a decimal point. This function is a hook for derived classes to change the value returned.

Returns: char_type representing a decimal point.

Definition at line 1809 of file locale.

Referenced by std::numpunct< CharT >::decimal_point().

template<typename CharT> virtual string_type std::numpunct< CharT >::do_falsename () const [inline, protected, virtual]

Return string representation of bool false.

Returns a string_type containing the text representation for false bool variables. This function is a hook for derived classes to change the value returned.

Returns: string_type representing printed form of false.

Definition at line 1860 of file locale.

Referenced by std::numpunct< CharT >::falsename().

template<typename CharT> virtual string std::numpunct< CharT >::do_grouping () const [inline, protected, virtual]

Return grouping specification.

Returns a string representing groupings for the integer part of a number. This function is a hook for derived classes to change the value returned.

See also: grouping() for details.

Returns: String representing grouping specification.

Definition at line 1834 of file locale.

Referenced by std::numpunct< CharT >::grouping().

template<typename CharT> virtual char_type std::numpunct< CharT >::do_thousands_sep () const [inline, protected, virtual]

Return thousands separator character.

Returns a char_type to use as a thousands separator. This function is a hook for derived classes to change the value returned.

Returns: char_type representing a thousands separator.

Definition at line 1821 of file locale.

Referenced by std::numpunct< CharT >::thousands_sep().

template<typename CharT> virtual string_type std::numpunct< CharT >::do_truename () const [inline, protected, virtual]

Return string representation of bool true.

Returns a string_type containing the text representation for true bool variables. This function is a hook for derived classes to change the value returned.

Returns: string_type representing printed form of true.

Definition at line 1847 of file locale.

Referenced by std::numpunct< CharT >::truename().

template<typename CharT> string_type std::numpunct< CharT >::falsename () const [inline]

Return string representation of bool false.

This function returns a string_type containing the text representation for false bool variables. It does so by calling numpunct<char_type>::do_falsename().

Returns: string_type representing printed form of false.

Definition at line 1792 of file locale.

References std::numpunct< CharT >::do_falsename().

Referenced by std::numpunct_cache< CharT >::M_cache().

template<typename CharT> string std::numpunct< CharT >::grouping () const [inline]

Return grouping specification.

This function returns a string representing groupings for the integer part of a number. Groupings indicate where thousands separators should be inserted in the integer part of a number.

Each char in the return string is interpret as an integer rather than a character. These numbers represent the number of digits in a group. The first char in the string represents the number of digits in the least significant group. If a char is negative, it indicates an unlimited number of digits for the group. If more chars from the string are required to group a number, the last char is used repeatedly.

For example, if the grouping() returns '\003\002' and is applied to the number 123456789, this corresponds to 12,34,56,789. Note that if the string was '32', this would put more than 50 digits into the least significant group if the character set is ASCII.

The string is returned by calling numpunct<char_type>::do_grouping().

Returns: string representing grouping specification.

Definition at line 1766 of file locale.

References std::numpunct< CharT >::do_grouping().

Referenced by std::numpunct_cache< CharT >::M_cache().

template<typename CharT> char_type std::numpunct< CharT >::thousands_sep () const [inline]

Return thousands separator character.

This function returns a char_type to use as a thousands separator. It does so by returning returning numpunct<char_type>::do_thousands_sep().

Returns: char_type representing a thousands separator.

Definition at line 1735 of file locale.

References std::numpunct< CharT >::do_thousands_sep().

Referenced by std::numpunct_cache< CharT >::M_cache().

template<typename CharT> string_type std::numpunct< CharT >::truename () const [inline]

Return string representation of bool true.

This function returns a string_type containing the text representation for true bool variables. It does so by calling numpunct<char_type>::do_truename().

Returns: string_type representing printed form of true.

Definition at line 1779 of file locale.

References std::numpunct< CharT >::do_truename().

Referenced by std::numpunct_cache< CharT >::M_cache().

Member Data Documentation

template<typename CharT> locale::id std::numpunct< CharT >::id [static]

Numpunct facet id.

Definition at line 1673 of file locale.

Author

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