def rfind

bend-kit-bytes@0.3.3.0 · bytes.bend:466

import Base

466# Index of the last match of needle, or None. An empty needle matches at len.
467def rfind(b: Bytes, +needle: String) -> Bytes & Maybe<&2, U32>:
468  Bytes{+len, buf} = b
469  +m = count(needle, 0)
470  find.at(U32.is_lt(len, m), len, buf, needle, (len - m : U32), (len - m : U32), False{})