syntax_data: {"ast_node_type":"enum","tokens":[{"end":90,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:     let poll_enum = Ty::new_adt(tcx, poll_adt_ref, tcx.mk_args(&[tcx.types.unit.into()]));
context_before:     let poll_adt_ref = tcx.adt_def(tcx.require_lang_item(LangItem::Poll, body.span));
context_after:     body.local_decls[RETURN_PLACE] = LocalDecl::with_source_info(poll_enum, source_info);