closuretest.gno

 1package closuretest
 2
 3import "strconv"
 4
 5var (
 6	count   int
 7	stepper func() int
 8)
 9
10var (
11	accumulator func(int)
12	history     []int
13)
14
15func init() {
16	step := 3
17	stepper = func() int {
18		count += step
19		return count
20	}
21
22	maxLen := 10
23	history = make([]int, 0, maxLen)
24	accumulator = func(val int) {
25		if len(history) < maxLen {
26			history = append(history, val)
27		}
28	}
29}
30
31func Step() string {
32	result := stepper()
33	return "count=" + strconv.Itoa(result)
34}
35
36func Accumulate(val int) string {
37	accumulator(val)
38	return "history length=" + strconv.Itoa(len(history))
39}
40
41func Render(_ string) string {
42	return "closuretest: count=" + strconv.Itoa(count) + " history=" + strconv.Itoa(len(history))
43}