STD::NUMPUNCT(3cxx)

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version 14-20240412 · 16 versions
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🌸 NAME 🌸

okay so bestie, this is the manual page for std::numpunct< _CharT >(3cxx) — aka the Primary class template numpunct. It’s giving “numbers? I know her.” 💅

✨ 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 (__c_locale __cloc, size_t __refs=0) — Internal constructor. Not for general use.
  • numpunct (__cache_type *__cache, size_t __refs=0) — Internal constructor. Not for general use.
  • numpunct (size_t __refs=0) — Numpunct constructor.
  • char_type decimal_point () const — Return decimal point character.
  • string_type falsename () const — Return string representation of bool false.
  • string grouping () const — Return grouping specification.
  • char_type thousands_sep () const — Return thousands separator character.
  • string_type truename () const — Return string representation of bool true.

⭐ Static Public Attributes

  • static locale::id id — Numpunct facet id.

🛡️ Protected Member Functions

  • virtual ~numpunct () — Destructor.
  • void _M_initialize_numpunct (__c_locale __cloc)
  • void _M_initialize_numpunct (__c_locale __cloc) — yes, it’s listed twice in the page, not me being extra 💀
  • void _M_initialize_numpunct (__c_locale __cloc=0)
  • virtual char_type do_decimal_point () const — Return decimal point character.
  • virtual string_type do_falsename () const — Return string representation of bool false.
  • virtual string do_grouping () const — Return grouping specification.
  • virtual char_type do_thousands_sep () const — Return thousands separator character.
  • virtual string_type do_truename () const — Return string representation of bool true.

🧚 Static Protected Member Functions

static __c_locale _S_clone_c_locale (__c_locale &__cloc)  throw ()
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 ()  throw ()
static __c_locale _S_lc_ctype_c_locale (__c_locale __cloc, const char
    *__s)

🌈 Protected Attributes

  • __cache_type * _M_data

💜 Detailed Description 💜

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

Primary class template numpunct. 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. ✨

🦋 Member Typedef Documentation 🦋

  • template<typename _CharT > typedef _CharT std::numpunct< _CharT >::char_type — Public typedefs.
  • template<typename _CharT > typedef basic_string<_CharT> std::numpunct< _CharT >::string_type — Public typedefs.

🎀 Constructor & Destructor Documentation 🎀

💫 numpunct (size_t __refs = 0)

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

Numpunct constructor.

  • __refs — Refcount to pass to the base class.

💫 numpunct (__cache_type * __cache, size_t __refs = 0)

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.

  • __cache — __numpunct_cache object.
  • __refs — Refcount to pass to the base class.

💫 numpunct (__c_locale __cloc, size_t __refs = 0)

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.

  • __cloc — The C locale.
  • __refs — Refcount to pass to the base class.

💫 virtual ~numpunct ()

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

Destructor.

💅 Member Function Documentation 💅

💫 decimal_point () const

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 numpunct<char_type>::do_decimal_point().

  • Returns: char_type representing a decimal point.
  • References: std::numpunct< _CharT >::do_decimal_point().

💫 do_decimal_point () const

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.
  • Referenced by: std::numpunct< _CharT >::decimal_point().

💫 do_falsename () const

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.
  • Referenced by: std::numpunct< _CharT >::falsename().

💫 do_grouping () const

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.
  • Referenced by: std::numpunct< _CharT >::grouping().

💫 do_thousands_sep () const

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.
  • Referenced by: std::numpunct< _CharT >::thousands_sep().

💫 do_truename () const

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.
  • Referenced by: std::numpunct< _CharT >::truename().

💫 falsename () const

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.
  • References: std::numpunct< _CharT >::do_falsename().

💫 grouping () const

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 interpreted 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 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.
  • References: std::numpunct< _CharT >::do_grouping().

💫 thousands_sep () const

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 numpunct<char_type>::do_thousands_sep().

  • Returns: char_type representing a thousands separator.
  • References: std::numpunct< _CharT >::do_thousands_sep().

💫 truename () const

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.
  • References: std::numpunct< _CharT >::do_truename().

🌟 Member Data Documentation 🌟

💫 id

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

Numpunct facet id.

👑 Author 👑

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🎀 okay that’s the whole manual, bestie! Footer sign-off: source/version is libstdc++, page tag is std::numpunct< _CharT >(3cxx), and there’s no date printed in this footer, so I’m not making one up. Byeee! 💖✨

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