cpp/utility/format/vformat to

Format arguments held by according to the format string, and write the result to the output iterator. If present, is used for locale-specific formatting.

Let be  ( for overloads,  for overloads ).

The behavior is undefined if does not model (meet the semantic requirements of) the  concept, or if  does not meet the  requirements for any  in the type of arguments.

Return value
Iterator past the end of the output range.

Exceptions
Throws std if is not a valid format string for the provided arguments. Also propagates any exception thrown by formatter or iterator operations.