{"ast_node_type":"other","tokens":[{"end":56,"kind":"keyword","start":0,"text":"(accepted,"}]}
    (accepted, self_struct_ctor, "1.32.0", Some(51994)),
    /// Allows `Self` struct constructor (RFC 2302).
    /// Allows use of x86 SHA512, SM3 and SM4 target-features and intrinsics