{"ast_node_type":"other","tokens":[{"end":72,"kind":"keyword","start":0,"text":"ty::Adt(def,"}]}
                ty::Adt(def, _) => is_def_must_use(cx, def.did(), span),
                }
                ty::Alias(ty::Opaque | ty::Projection, ty::AliasTy { def_id: def, .. }) => {