{"ast_node_type":"other","tokens":[{"end":57,"kind":"keyword","start":0,"text":"Const::Ty(self.tcx.types.usize,"}]}
                    Const::Ty(self.tcx.types.usize, *len)
                if let ty::Array(_, len) = place_ty.ty.kind() {
                        .try_eval_scalar(self.tcx, self.typing_env)