{"ast_node_type":"other","tokens":[{"end":70,"kind":"keyword","start":0,"text":"self.demand_suptype(rhs_span,"}]}
                self.demand_suptype(rhs_span, tcx.types.bool, rhs_ty);
                self.demand_suptype(lhs_span, tcx.types.bool, lhs_ty);
                tcx.types.bool