syntax_data: {"ast_node_type":"other","tokens":[{"end":41,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:                         if ty.is_enum() {
context_before:                         let ty = self.map.places[lhs].ty;
context_after:                             lhs = self.map.register_place(ty, lhs, TrackElem::Variant(variant));