{"ast_node_type":"other","tokens":[{"end":54,"kind":"keyword","start":0,"text":"Rvalue::Aggregate(box"}]}
            Rvalue::Aggregate(box kind, operands) => {
            // If we expect `lhs ?= A`, we have an opportunity if we assume `constant == A`.
                let agg_ty = lhs_place.ty(self.body, self.tcx).ty;