Problem with Bitwise Barrel Shift Rotate left and right in C#

Question

In C++ I have code like this.

    static UInt32 rol(UInt32 value, UInt32 bits)
    {
        bits &= 31;
        return ((value << bits) | (value >&         


        

Answer 1

You should use int type for the right side variable in shift operators.

Answer 2

The right operand must be always type int.

 int x << int bits
 uint x << int bits
 long x << int bits
 ulong x << int bits

Answer 3

You will have to cast the right side of the bitshift operator to int. If you cast like (int)(32 - bits), it should not affect your intended purpose. The right side is just expecting an int, probably because it's simpler that way and highly unlikely you'll ever want to shift more than 2 billion bits.