Macro delegate 

macro_rules! delegate {
    ($base_trait:ty, fn $name:ident (&self, $($pname:ident: $ptype:ty),*) -> $rtype:ty) => { ... };
    ($base_trait:ty, fn $name:ident (&self) -> $rtype:ty) => { ... };
}

Used to easily implement functions in the trait definition of RingStore and its subtraits to delegate the call to the same function of the underlying RingBase.

Example

 
trait WeirdRingBase: RingBase {
    fn foo(&self) -> Self::Element;
}
 
trait WeirdRingStore: RingStore
    where Self::Type: WeirdRingBase
{
    delegate!{ WeirdRingBase, fn foo(&self) -> El<Self> }
}

Limitations

This macro does not work if the function takes generic parameters. In this case, write the delegation manually.