Parse takes a format string and its index in the printf-like call, parses out all format operations, returns a slice of parsed [Operation] which describes flags, width, precision, verb, and argument indexing, or an error if parsing fails.

Operation holds the parsed representation of a printf operation such as "%3.*[4]d".

byte offsets of format string.

Size describes an optional width or precision in a format operation.

Verb represents the verb character of a format operation (e.g., 'd', 's', 'f').