std::moneypunct::pos_format, do_pos_format, neg_format, do_neg_format

C++

Language

Headers

Freestanding and hosted implementations

Named requirements

Language support library

Concepts library (C++20)

Diagnostics library

Utilities library

Strings library

Containers library

Algorithms library

Iterators library

Numerics library

Input/output library

Localizations library

Regular expressions library (C++11)

Atomic operations library (C++11)

Thread support library (C++11)

Filesystem library (C++17)

Technical Specifications

Localizations library

Locales and facets
locale
use_facet	has_facet
Character classification
isspace isblank (C++11) iscntrl isupper islower isalpha	isdigit ispunct isxdigit isalnum isprint isgraph
Conversions
toupper tolower	wstring_convert (C++11) wbuffer_convert (C++11)
Facet category base classes
ctype_base codecvt_base messages_base	time_base money_base
Facet categories
ctype ctype<char> codecvt collate messages time_get time_put	num_get num_put numpunct money_get money_put moneypunct
Locale-specific facets
ctype_byname codecvt_byname messages_byname collate_byname	time_get_byname time_put_byname numpunct_byname moneypunct_byname
Code conversion facets
codecvt_utf8 (C++11) codecvt_utf16 (C++11)	codecvt_utf8_utf16 (C++11) codecvt_mode (C++11)
C locale
setlocale localeconv lconv	LC_ALLLC_COLLATELC_CTYPELC_MONETARYLC_NUMERICLC_TIME

std::moneypunct

Member functions

moneypunct::moneypunct

moneypunct::~moneypunct

moneypunct::decimal_pointmoneypunct::do_decimal_point

moneypunct::thousands_sepmoneypunct::do_thousands_sep

moneypunct::groupingmoneypunct::do_grouping

moneypunct::curr_symbolmoneypunct::do_curr_symbol

moneypunct::frac_digitsmoneypunct::do_frac_digits

moneypunct::positive_signmoneypunct::do_positive_signmoneypunct::negative_signmoneypunct::do_negative_sign

moneypunct::pos_formatmoneypunct::do_pos_formatmoneypunct::neg_formatmoneypunct::do_neg_format

Defined in header <locale>
public: pattern pos_format() const;	(1)
public: pattern neg_format() const;	(2)
protected: virtual pattern do_pos_format() const;	(3)
protected: virtual pattern do_neg_format() const;	(4)

1) Public member function, calls the member function do_pos_format of the most derived class.

2) Public member function, calls the member function do_neg_format of the most derived class.

3) Returns the format structure (of type std::money_base::format) which describes the formatting of positive monetary values.

4) Returns the format structure (of type std::money_base::format) which describes the formatting of negative monetary values.

The standard specializations of std::moneypunct return the pattern {symbol, sign, none, value}

Return value

The object of type std::money_base::format describing the formatting used by this locale.

Notes

While std::money_put uses pos_format for formatting positive values and neg_format for formatting negative values, std::money_get uses neg_format for parsing all monetary values: it assumes that neg_format is compatible with pos_format.

Example

Run this code

#include <locale>
#include <iostream>
#include <iomanip>

struct my_punct : std::moneypunct_byname<char, false> {
    my_punct(const char* name) : moneypunct_byname(name) {}
    pattern do_pos_format() const { return { {value, space, symbol, sign} };}
    pattern do_neg_format() const { return { {value, space, symbol, sign} };}
};
int main()
{
    std::cout.imbue(std::locale("en_US.utf8"));
    std::cout << "american locale: " << std::showbase
              << std::put_money(12345678.0) << '\n';

    std::cout.imbue(std::locale(std::cout.getloc(), new my_punct("en_US.utf8")));
    std::cout << "locale with modified moneypunct:\n"
              << std::put_money(12345678.0)  << '\n'
              << std::put_money(-12345678.0) << '\n';
}

Output:

american locale: $123,456.78
locale with modified moneypunct:
123,456.78 $
123,456.78 $-

See also

do_curr_symbol [virtual]	provides the string to use as the currency identifier (virtual protected member function)
do_positive_signdo_negative_sign [virtual]	provides the string to indicate a positive or negative value (virtual protected member function)
do_get [virtual]	parses a monetary value from an input stream (virtual protected member function of std::money_get)
do_put [virtual]	formats a monetary value and writes to output stream (virtual protected member function of std::money_put)