{"ast_node_type":"other","tokens":[{"end":74,"kind":"keyword","start":0,"text":"if"}]}
        if head_pat.as_pat().is_some_and(|pat| pat.arity() > ctor_arity) {
        let head_pat = self.head();
            // Arity can be smaller in case of variable-length slices, but mustn't be larger.