std::range-default-formatter,(3)

NAME
std::range-default-formatter, - std::range-default-formatter,

Synopsis
   Defined in header <format>
   template< std::range_format K, ranges::input_range R, class
   CharT >
                        (since C++23)
       requires (K == std::range_format::string || K == (exposition only*)
   std::range_format::debug_string)
   struct range-default-formatter<K, R, CharT>;
   The class template range-default-formatter for range types is specialized for
   formatting range as a string or an escaped string if std::format_kind<R> is either
   std::range_format::string or std::range_format::debug_string.

Member objects
   Member name Definition
                        the underlying formatter of type
   underlying_ (private) std::formatter<std::basic_string<CharT>, CharT>
                        (exposition-only member object*)

Member functions
   constructor constructs a range-default-formatter
   (implicitly declared) (public member function)
   parse parses the format specifier as specified by std-format-spec
                        (public member function)
   format writes the formatted output as specified by std-format-spec
                        (public member function) std::range-default-formatter<std::range_format::string>::parse std::range-default-formatter<std::range_format::debug_string>::parse
   template< class ParseContext >
   constexpr auto parse( ParseContext& ctx ) -> ParseContext::iterator;
   Equivalent to:
   auto i = underlying_.parse(ctx);
   if constexpr (K == std::range_format::debug_string)
       underlying_.set_debug_format();
   return i;
   Returns an iterator past the end of the std-format-spec. std::range-default-formatter<std::range_format::string>::format std::range-default-formatter<std::range_format::debug_string>::format
   template< class FormatContext >
   auto format( /* see below */& r, FormatContext& ctx ) const ->
   FormatContext::iterator;
   If ranges::input_range<const R> is true, the type of r is const R&. Otherwise, the
   type is R&.
   Let s be a std::basic_string<CharT> as if by constructing s with
   std::basic_string<CharT>(std::from_range, r) such that ranges::equal(s, r) is true.
   Equivalent to return underlying_.format(s, ctx);.
   Returns an iterator past the end of the output range.

See also
   formatter defines formatting rules for a given type
   (C++20) (class template)
   range_formatter class template that helps implementing std::formatter
   (C++23) specializations for range types
                   (class template)