Macro impl_shake 

macro_rules! impl_shake {
    (
        $name:ident, $full_name:ident, $reader:ident, $reader_full:ident,
        $rate:ident, $pad:expr, $alg_name:expr $(,)?
    ) => { ... };
    (
        $name:ident, $full_name:ident, $reader:ident, $reader_full:ident,
        $rate:ident, $pad:expr, $alg_name:expr, $oid:literal $(,)?
    ) => { ... };
}