syntax_data: {"ast_node_type":"other","tokens":[{"end":38,"kind":"keyword","start":0,"text":"match"}]}
source_snippet:     match (field1_kind, field2_kind) {
context_before:     }
context_after:         (RegPassKind::Integer(l), RegPassKind::Float(r)) => Some(FloatConv::MixedPair(l, r)),