Macro fake::binary_heap

macro_rules! binary_heap {
    (@ty $t:ty) => { ... };
    (@ty $t:ty;) => { ... };
    (@ty $t:ty; $e:expr) => { ... };
    (@ty $t:ty; $e:expr, $($r:tt)*) => { ... };
    (@c $e:expr; $l:expr) => { ... };
    (@c $e:expr; $l:expr,) => { ... };
    (@c $e:expr; $l:expr, $($r:tt)*) => { ... };
    ($t:ty; $($l:tt)+) => { ... };
    ($t:ty as $e:expr; $($l:tt)+) => { ... };
}