syntax_data: {"ast_node_type":"other","tokens":[{"end":93,"kind":"keyword","start":0,"text":"self.match_candidates(span,"}]}
source_snippet:                 self.match_candidates(span, scrutinee_span, or_start, &mut [leaf_candidate]);
context_before:             let otherwise =
context_after:             // In a case like `(P | Q, R | S)`, if `P` succeeds and `R | S` fails, we know `(Q,