Macro bec 

macro_rules! bec {
    () => { ... };
    ( $($elem:expr),+ $(,)? ) => { ... };
}

Boxes each element in the vector.

Examples

use wec::bec;

let v = bec![1, 2, 3];
assert_eq!(v, vec![Box::new(1), Box::new(2), Box::new(3)]);