Macro mika::update

macro_rules! update {
    ($state:ident, $first:ident$(::$idents:ident)*) => { ... };
    ($state:ident, $first:ident$(::$idents:ident)*(_)) => { ... };
    ($state:ident, $first:ident$(::$idents:ident)*(_, $($tt:tt)+)) => { ... };
    ($state:ident, $first:ident$(::$idents:ident)*($($tt:tt)+)) => { ... };
}