Macro shared_vector::vector

macro_rules! vector {
    (@one@ $x:expr) => { ... };
    ($elem:expr; $n:expr) => { ... };
    ($($x:expr),*$(,)*) => { ... };
    ([$($x:expr),*$(,)*] in $allocator:expr) => { ... };
    ([$x:expr;$n:expr] in $allocator:expr) => { ... };
}