[facet.numpunct.virtuals] (original) (raw)

28 Text processing library [text]

28.3 Localization library [localization]

28.3.4 Standard locale categories [locale.categories]

28.3.4.4.1 Class template numpunct [locale.numpunct]

28.3.4.4.1.3 Virtual functions [facet.numpunct.virtuals]

char_type do_decimal_point() const;

Returns: A character for use as the decimal radix separator.

The required specializations return '.' or L'.'.

char_type do_thousands_sep() const;

Returns: A character for use as the digit group separator.

The required specializations return ',' or L','.

string do_grouping() const;

Returns: A string vec used as a vector of integer values, in which each element vec[i] represents the number of digits[226](#footnote-226 "Thus, the string "\003" specifies groups of 3 digits each, and "3" probably indicates groups of 51 (!) digits each, because 51 is the ASCII value of "3".")in the group at position i, starting with position 0 as the rightmost group.

If vec.size() <= i, the number is the same as group (i - 1); if (i < 0 || vec[i] <= 0 || vec[i] == CHAR_MAX), the size of the digit group is unlimited.

The required specializations return the empty string, indicating no grouping.

string_type do_truename() const; string_type do_falsename() const;

Returns: A string representing the name of the boolean value true or false, respectively.