{"ast_node_type":"other","tokens":[{"end":67,"kind":"keyword","start":0,"text":".try_eval_scalar(self.tcx,"}]}
                        .try_eval_scalar(self.tcx, self.typing_env)
                    Const::Ty(self.tcx.types.usize, *len)
                        .map_or(FlatSet::Top, FlatSet::Elem)