- Returns the start and end offset of the leftmost match. If no match
exists, then - Noneis returned.
 
- Returns an iterator over all non-overlapping leftmost matches in the
given bytes. If no match exists, then the iterator yields no elements. 
- Returns the start and end offset of the leftmost match. If no match
exists, then - Noneis returned.
 
- Executes a forward search and returns the end position of the leftmost
match that is found. If no match exists, then - Noneis returned.
 
- Executes a reverse search and returns the start of the position of the
leftmost match that is found. If no match exists, then - Noneis
returned.