{"ast_node_type":"other","tokens":[{"end":48,"kind":"keyword","start":0,"text":"ty::ConstKind::Value(cv)"}]}
            ty::ConstKind::Value(cv) => cv.ty(),
            ty::ConstKind::Bound(_, _) => panic!("escaping bound vars in {:?}", ct),
            ty::ConstKind::Placeholder(placeholder) => {