// RUN: %swift-format %s >%t.response
// RUN: diff -u %s.response %t.response
// RUN: %swift-format -indent-width 2 %s >%t.response
// RUN: diff -u %s.indent2.response %t.response
// RUN: %swift-format -use-tabs %s >%t.response
// RUN: diff -u %s.tabs.response %t.response
// RUN: %swift-format -line-range 24:29 %s >%t.response
// RUN: diff -u %s.lines.response %t.response
// RUN: %swift-format -indent-switch-case %s >%t.response
// RUN: diff -u %s.indentswitch.response %t.response

import Foundation

func collatz(n: Int, m: String?) {
	switch m {
	case .some(let s):
		print(s)
	case .none:
		print("nothing")
	default:
		print("not possible")
		break
	}
	var r: Int
	if n%2 == 0 {
		r = n/2
	} else {
		r = 3*n+1
	}
	print("Number: \(r)")
	if r == 1 {
		print("Reached one!")
	} else {
		collatz(r)
	}
}