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https://github.com/golang/go
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b89a840d65
To clear map, and zero content of slice. Updates #56351 Change-Id: I5f81dfbc465500f5acadaf2c6beb9b5f0d2c4045 Reviewed-on: https://go-review.googlesource.com/c/go/+/453395 Reviewed-by: Cherry Mui <cherryyz@google.com> Reviewed-by: Keith Randall <khr@golang.org> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Keith Randall <khr@google.com> Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com> Auto-Submit: Cuong Manh Le <cuong.manhle.vn@gmail.com>
48 lines
743 B
Go
48 lines
743 B
Go
// run
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// Copyright 2022 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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import "math"
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func checkClearSlice() {
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s := []int{1, 2, 3}
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clear(s)
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for i := range s {
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if s[i] != 0 {
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panic("clear not zeroing slice elem")
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}
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}
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clear([]int{})
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}
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func checkClearMap() {
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m1 := make(map[int]int)
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m1[0] = 0
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m1[1] = 1
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clear(m1)
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if len(m1) != 0 {
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panic("m1 is not cleared")
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}
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// map contains NaN keys is also cleared.
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m2 := make(map[float64]int)
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m2[math.NaN()] = 1
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m2[math.NaN()] = 1
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clear(m2)
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if len(m2) != 0 {
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panic("m2 is not cleared")
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}
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clear(map[int]int{})
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}
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func main() {
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checkClearSlice()
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checkClearMap()
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}
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