# std::moneypunct<CharT,International>::pos_format, do_pos_format, neg_format, do_neg_format

From cppreference.com
< cpp‎ | locale‎ | moneypunct

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<CharT,InputIt>`)
do_put [virtual] | formats a monetary value and writes to output stream (virtual protected member function of `std::money_put<CharT,OutputIt>`)

Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/locale/moneypunct/pos_format&oldid=98202"