I can't really google the name AND NOT and get any useful results, what exactly is this operator, and how could I do this in a language like C? I checked the specification, and there is nothing helpful in there but a list that says it's &^
(AND NOT).
Golang中的“&^”运算符是什么?
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- doutangqi4444 2015-12-25 02:25关注
The C equivalent of the Go expression
x &^ y
is justx & ~y
. That is literally "x
AND (bitwise NOT ofy
)".In the arithmetic operators section of the spec describes
&^
as a "bit clear" operation, which gives an idea of what you'd want to use it for. As two separate operations,~y
will convert each one bit to a zero, which will then clear the corresponding bit inx
. Each zero bit will be converted to a one, which will preserve the corresponding bit inx
.So if you think of
x | y
as a way to turn on certain bits ofx
based on a mask constanty
, thenx &^ y
is doing the opposite and turns those same bits off.本回答被题主选为最佳回答 , 对您是否有帮助呢?解决 无用评论 打赏 举报