{"ast_node_type":"other","tokens":[{"end":25,"kind":"keyword","start":0,"text":"match"}]}
        match ct.kind() {
    fn maybe_from_const(ct: ty::Const<'tcx>) -> Option<Self> {
            ty::ConstKind::Infer(InferConst::Var(v)) => Some(TyOrConstInferVar::Const(v)),