Macro shortcut_map 

macro_rules! shortcut_map {
    ($($key:expr => $cmd:expr),* $(,)?) => { ... };
}

Build a ShortcutMap from shortcut_string => command pairs.

Example

let map = shortcut_map![
    "F1" => AppCmd::ShowHelp,
    "F7" => AppCmd::PrevProfile,
];