Macro tract_core::element_bin

macro_rules! element_bin {
    ($name:ident, [$($type:ty),*] => $to:ty { $expr:expr }) => { ... };
    ($name:ident, [$($type:ty),*] { $expr:expr }) => { ... };
    ($name:ident, match $($type:ty => $to:ty { $expr:expr }),*) => { ... };
}