1// compile
2
3// Copyright 2009 The Go Authors. All rights reserved.
4// Use of this source code is governed by a BSD-style
5// license that can be found in the LICENSE file.
6
7package main
8
9func
10swap(x, y int) (u, v int) {
11	return y, x
12}
13
14func
15main() {
16	a := 1;
17	b := 2;
18	a, b = swap(swap(a, b));
19	if a != 2 || b != 1 {
20		panic("bad swap");
21	}
22}
23