What is ^0 in golang?

php editor Xiaoxin will answer your question about "What is ^0 in golang?". In golang, ^0 is a bit operation operator, which represents the bitwise inversion of an integer. Specifically, ^0 will invert each bit of the integer, so 0 becomes 1 and 1 becomes 0. This operation can be used to negate integers. It should be noted that the ^0 operation in golang can only be used for unsigned integer types. For signed integer types, type conversion is required first. Hope this short answer helps you!

Question content

I see ^0 in the code base.

Example:

type stat struct {
  ...
  min int64
  ...
}

newStat := stat{min: ^0}

What does

^0 mean?

Solution

According to Documentation:

^x The bitwise complement is m ^ x, where m = "all bits set to 1"

Unsigned x and m = -1 (for signed x)

So ^x inverts every bit in x, eg. 0101 becomes 1010. This means ^0 is the same as ~0 in other mainstream languages.

When using two's complement to represent negative numbers (as most programming languages ​​do), the bitwise complement of zero (all bits being 1) has the value -1. So this is one way to write it:

newStat := stat{min: -1}

The above is the detailed content of What is ^0 in golang?. For more information, please follow other related articles on the PHP Chinese website!