1// run
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
7// Test for loops.
8
9package main
10
11func assertequal(is, shouldbe int, msg string) {
12	if is != shouldbe {
13		print("assertion fail", msg, "\n")
14		panic(1)
15	}
16}
17
18func main() {
19	var i, sum int
20
21	i = 0
22	for {
23		i = i + 1
24		if i > 5 {
25			break
26		}
27	}
28	assertequal(i, 6, "break")
29
30	sum = 0
31	for i := 0; i <= 10; i++ {
32		sum = sum + i
33	}
34	assertequal(sum, 55, "all three")
35
36	sum = 0
37	for i := 0; i <= 10; {
38		sum = sum + i
39		i++
40	}
41	assertequal(sum, 55, "only two")
42
43	sum = 0
44	for sum < 100 {
45		sum = sum + 9
46	}
47	assertequal(sum, 99+9, "only one")
48
49	sum = 0
50	for i := 0; i <= 10; i++ {
51		if i%2 == 0 {
52			continue
53		}
54		sum = sum + i
55	}
56	assertequal(sum, 1+3+5+7+9, "continue")
57
58	i = 0
59	for i = range [5]struct{}{} {
60	}
61	assertequal(i, 4, " incorrect index value after range loop")
62
63	i = 0
64	var a1 [5]struct{}
65	for i = range a1 {
66		a1[i] = struct{}{}
67	}
68	assertequal(i, 4, " incorrect index value after array with zero size elem range clear")
69
70	i = 0
71	var a2 [5]int
72	for i = range a2 {
73		a2[i] = 0
74	}
75	assertequal(i, 4, " incorrect index value after array range clear")
76}
77