Function isPowerOfTwo [src]

Asserts int > 0.

Prototype

pub fn isPowerOfTwo(int: anytype) bool

Example

 test isPowerOfTwo {
    try testing.expect(isPowerOfTwo(@as(u8, 1)));
    try testing.expect(isPowerOfTwo(2));
    try testing.expect(!isPowerOfTwo(@as(i16, 3)));
    try testing.expect(isPowerOfTwo(4));
    try testing.expect(!isPowerOfTwo(@as(u32, 31)));
    try testing.expect(isPowerOfTwo(32));
    try testing.expect(!isPowerOfTwo(@as(i64, 63)));
    try testing.expect(isPowerOfTwo(128));
    try testing.expect(isPowerOfTwo(@as(u128, 256)));
}

Source

  pub fn isPowerOfTwo(int: anytype) bool {
    assert(int > 0);
    return (int & (int - 1)) == 0;
}  