std::moneypunct::pos_format,do_pos_format,neg_format,do_neg_format(3)

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

Synopsis
   Defined in header <locale>
   public: (1)
   pattern pos_format() const;
   public: (2)
   pattern neg_format() const;
   protected: (3)
   virtual pattern do_pos_format() const;
   protected: (4)
   virtual pattern do_neg_format() const;
   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 provides the string to use as the currency identifier
   [virtual] (virtual protected member function)
   do_positive_sign provides the string to indicate a positive or negative value
   do_negative_sign (virtual protected member function)
   [virtual]
   do_get parses a monetary value from an input stream
   [virtual] (virtual protected member function of
                    std::money_get<CharT,InputIt>)
   do_put formats a monetary value and writes to output stream
   [virtual] (virtual protected member function of
                    std::money_put<CharT,OutputIt>)