Macro sugars::cdeque

macro_rules! cdeque {
    ($($tokens: tt)+) => { ... };
}

Build VecDeque from collection iterator comprehensions.

Limitations

• Only 3 nested comprehensions

Examples:

use sugars::cdeque;

let w = cdeque![x; x in 1..10];
let z = cdeque![x; x in 1..10, if x%2 == 0];