Make the successful return value from a match expression be truthy and the failure value false. This avoids an extra method call when checking the result and avoids allocating a new object when a match fails.

#{
	main <- {
		foo <- dict linear:
		foo set: "key1" "val1"
		foo set: "key2" "val2"
		foreach: foo :k :v {
			print: k . ", " . v . "\n"
		}

	}
}