Go语言的bit clear操作

以下摘自The Go Programming Language

The &^ operator is bit clear (AND NOT): in the expression z = x &^ y, each bit of z is 0 if the corresponding bit of y is 1; otherwise it equals the corresponding bit of x.

z = x &^ y运算相当于先把y取反(针对y的每个bit0变成11变成0),然后再和x进行&运算。参考下例:

package main
import "fmt"

func main(){
    var x uint8 = 1
    var y uint8 = 1 << 2

    fmt.Printf("%08b\n", x &^ y);

}  

执行结果如下:

00000001

 

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