syntax_data: {"ast_node_type":"variable","tokens":[{"end":63,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let (discriminant_ty, rvalue) = match state_ty.kind() {
context_before:         let state_ty = state_decl.ty;
context_after:             ty::Adt(adt_def, _) if adt_def.is_enum() => {