| Cuong Manh Le | b89a840 | 2022-11-25 16:11:45 +0700 | [diff] [blame] | 1 | // run |
| 2 | |
| 3 | // Copyright 2022 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 | package main |
| 8 | |
| 9 | import "math" |
| 10 | |
| 11 | func checkClearSlice() { |
| 12 | s := []int{1, 2, 3} |
| 13 | clear(s) |
| 14 | for i := range s { |
| 15 | if s[i] != 0 { |
| 16 | panic("clear not zeroing slice elem") |
| 17 | } |
| 18 | } |
| 19 | |
| 20 | clear([]int{}) |
| 21 | } |
| 22 | |
| 23 | func checkClearMap() { |
| 24 | m1 := make(map[int]int) |
| 25 | m1[0] = 0 |
| 26 | m1[1] = 1 |
| 27 | clear(m1) |
| 28 | if len(m1) != 0 { |
| 29 | panic("m1 is not cleared") |
| 30 | } |
| 31 | |
| 32 | // map contains NaN keys is also cleared. |
| 33 | m2 := make(map[float64]int) |
| 34 | m2[math.NaN()] = 1 |
| 35 | m2[math.NaN()] = 1 |
| 36 | clear(m2) |
| 37 | if len(m2) != 0 { |
| 38 | panic("m2 is not cleared") |
| 39 | } |
| 40 | |
| 41 | clear(map[int]int{}) |
| 42 | } |
| 43 | |
| 44 | func main() { |
| 45 | checkClearSlice() |
| 46 | checkClearMap() |
| 47 | } |