Oniguruma.RegionSourceMatch results.
The capture groups returned by a search or match.
capture_beg region idx gets the string position of the capture at the index. The capture at index 0 is the entire match. The string position is an offset in bytes. Returns -1 if the capture group wasn't found. Raises Invalid_argument if the index is out of bounds.
capture_end region idx gets the string position of the capture at the index. The capture at index 0 is the entire match. The string position is an offset in bytes. Returns -1 if the capture group wasn't found. Raises Invalid_argument if the index is out of bounds.