std::moneypunct<CharT,International>::grouping,do_grouping (3) - Linux Manuals

std::moneypunct<CharT,International>::grouping,do_grouping: std::moneypunct<CharT,International>::grouping,do_grouping

NAME

std::moneypunct<CharT,International>::grouping,do_grouping - std::moneypunct<CharT,International>::grouping,do_grouping

Synopsis

Defined in header <locale>
public: (1)
std::string grouping() const;
protected: (2)
virtual std::string do_grouping() const;

1) Public member function, calls the member function do_grouping of the most derived class.
2) Returns the pattern that determines the grouping of the digits in the monetary output, with the same exact meaning as std::numpunct::do_grouping

Return value

The object of type std::string holding the groups. The standard specializations of std::moneypunct return an empty string, indicating no grouping. Typical groupings (e.g. the en_US locale) return "\003".

Example

// Run this code

  #include <locale>
  #include <iostream>
  #include <iomanip>
  #include <iterator>
  struct space_out : std::moneypunct<char> {
      pattern do_pos_format() const { return { {value, none, none, none} };}
      int do_frac_digits() const { return 0; }
      char_type do_thousands_sep() const { return ' ';}
      string_type do_grouping() const { return "\002";}
  };
  int main()
  {
      std::cout.imbue(std::locale("en_US.UTF-8"));
      std::cout << "american locale: " << std::showbase
                << std::put_money(12345678.0)<< '\n';

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

Output:

  american locale: $123,456.78
  locale with modified moneypunct: 12 34 56 78