Macro fed::fed8

macro_rules! fed8 {
    ($a:ty, $b:ty, $c:ty, $d:ty, $e:ty, $f:ty, $g:ty, $h:ty) => { ... };
    ($a:ty, $b:ty, $c:ty, $d:ty, $e:ty, $f:ty, $g:ty, $h:ty, @without_children) => { ... };
    ($newtype:ty; $a:ty, $b:ty, $c:ty, $d:ty, $e:ty, $f:ty, $g:ty, $h:ty, @without_children) => { ... };
    ($newtype:ty; $a:ty, $b:ty, $c:ty, $d:ty, $e:ty, $f:ty, $g:ty, $h:ty) => { ... };
}