Macro simdeez::simd_runtime_generate

macro_rules! simd_runtime_generate {
    ($(#[$meta:meta])* $vis:vis fn $fn_name:ident $(<$($lt:lifetime),+>)? ($($arg:ident:$typ:ty),* $(,)? ) -> $rt:ty $body:block  ) => { ... };
    ($(#[$meta:meta])* $vis:vis fn $fn_name:ident ($($arg:ident:$typ:ty),* $(,)? ) $body:block  ) => { ... };
}