How Does Go's Bitwise AND NOT Operator (&^ ) Work, and How Does it Compare to C's Equivalent?

Bitwise AND NOT Operator in Go

The '&^' operator in Go is known as the bitwise AND NOT operator. It performs a bitwise operation between two integers, where each bit in the result is set to 1 if the corresponding bit in both operands is 1, and to 0 otherwise.

Equivalence in C

In C, the equivalent operation to Go's '&^' is '& ~'. This can be understood as performing a bitwise AND operation between the first operand and the bitwise NOT (ie. inverted) value of the second operand.

int x = 10; // 1010 (in binary)
int y = 6;  // 0110 (in binary)
int result = x & ~y; // 1000 (in binary)

In this example, the result is obtained by ANDing the bits in 'x' with the inverted bits in 'y', resulting in a value of 1000 (in binary).

Usage

The '&^' operator is commonly used in bit manipulation scenarios, where the goal is to selectively clear or unset bits in one operand based on the value of another operand. For instance, it can be used to:

• Set a bit to 0 if another bit is 1 (ie. turn off a bit)
• Mask off unwanted bits in a constant value
• Check if a bit is zero or one (by comparing the result with the original operand)

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