std::moneypunct::positive_sign, do_positive_sign, negative_sign, do_negative_sign

Defined in header `<locale>`
public: string_type positive_sign() const;	(1)
public: string_type negative_sign() const;	(2)
protected: virtual string_type do_positive_sign() const;	(3)
protected: virtual string_type do_negative_sign() const;	(4)

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

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

3) Returns the string that is used for formatting of positive monetary values.

3) Returns the string that is used for formatting of negative monetary values.

Only the first character of the string returned is the character that appears in the pos_format()/neg_format() position indicated by the value sign. The rest of the characters appear after the rest of the monetary string.

In particular, for negative_sign of "-", the formatting may appear as "-1.23 ", while for negative_sign of "()" it would appear as "(1.23 )".

Return value

The string of type string_type holding the characters to be used as positive or negative sign.

Example

Run this code

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

struct my_punct : std::moneypunct_byname<char, false> {
    my_punct(const char* name) : moneypunct_byname(name) {}
    string_type do_negative_sign() const { return "()"; }
};

int main()
{
    std::locale loc("de_DE.utf8");
    std::cout.imbue(loc);
    std::cout << loc.name() << " negative sign is '"
              << std::use_facet<std::moneypunct<char>>(loc).negative_sign()
              << "' for example: " << std::showbase << std::put_money(-1234) << '\n';

    std::locale loc2("ms_MY.utf8");
    std::cout.imbue(loc2);
    std::cout << loc2.name() << " negative sign is '"
              << std::use_facet<std::moneypunct<char>>(loc2).negative_sign()
              << "' for example: " << std::put_money(-1234) << '\n';

    std::cout.imbue(std::locale(std::cout.getloc(), new my_punct("de_DE.utf8")));
    std::cout << "de_DE.utf8 with negative_sign set to \"()\": "
              << std::put_money(-1234) << '\n';

}

Output:

de_DE.utf8 negative sign is '-' for example: -12,34 
ms_MY.utf8 negative sign is '()' for example: (RM12.34)
de_DE.utf8 with negative_sign set to "()": (12,34 )

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

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

std::moneypunct::positive_sign, do_positive_sign, negative_sign, do_negative_sign

Return value

Example

See also