Macro derive_arithmetic 

macro_rules! derive_arithmetic {
    ( Broadcast<T> > $rt:ty = $ot:ty) => { ... };
    ( $lt:ty > Broadcast<T> = $ot:ty) => { ... };
    ( $lt:ty > $rt:ty = $ot:ty) => { ... };
    ( $lt:ty > $rt:ty = r $clt:ty > r $crt:ty = $ot:ty) => { ... };
}

Macros for automatic derivation of the implementation of the four arithmetic operations

Arguments

• $lt - the left hand side type
• $rt - the right hand side type
• $clt - Converted type of the left-hand side type
• $crt - Converted type of the right-hand side type
• $ot - output type