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//            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
//                    Version 2, December 2004
//
// Copyleft (ↄ) meh. <meh@schizofreni.co> | http://meh.schizofreni.co
//
// Everyone is permitted to copy and distribute verbatim or modified
// copies of this license document, and changing it is allowed as long
// as the name is changed.
//
//            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
//   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
//
//  0. You just DO WHAT THE FUCK YOU WANT TO.

#[macro_export]
macro_rules! arg {
	($args:ident[$index:tt] => $default:tt) => (
		$args.get($index)
			.and_then(|v| v.map(|v| if v == 0 { $default } else { v }))
			.unwrap_or($default)
	);

	($args:ident[$index:tt]) => (
		$args.get($index).and_then(|v| *v)
	);
}