template <class OutputIter>
OutputIter format(
OutputIter out,
const char_type* fmt_first, const char_type* fmt_last,
regex_constants::match_flag_type flags = regex_constants::format_default) const;
Requires: ready() == true and OutputIter shall satisfy the requirements for an Output Iterator.
Effects: Copies the character sequence [fmt_first, fmt_last) to OutputIter out. Replaces each format specifier or escape sequence in the copied range with either the character(s) it represents or the sequence of characters within *this to which it refers. The bitmasks specified in flags determine which format specifiers and escape sequences are recognized.
template <class OutputIter, class ST, class SA>
OutputIter format(
OutputIter out,
const basic_string<char_type, ST, SA>& fmt,
regex_constants::match_flag_type flags = regex_constants::format_default) const;
template <class ST, class SA>
basic_string<char_type, ST, SA> format(
const basic_string<char_type, ST, SA>& fmt,
regex_constants::match_flag_type flags = regex_constants::format_default) const;
Effects: Constructs an empty string result of type basic_string<char_type, ST, SA> and calls:
format(back_inserter(result), fmt, flags);
string_type format(
const char_type* fmt,
regex_constants::match_flag_type flags = regex_constants::format_default) const;
Effects: Constructs an empty string result of type string_type and calls:
format(back_inserter(result), fmt, fmt + char_traits<char_type>::length(fmt), flags);