Macro layout 

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

Macro for easy layout creation. Works like vec![]. If the compiler gives you trouble, try changing your brackets to parentheses:

use blok::{ Layout, layout };

let layouts = vec![layout!(), layout!(1), layout!(2, 2), layout!(3; 3)];