next power of 2

[Andrei Alexandrescu]

On 10/6/12 4:54 PM, Dmitry Olshansky wrote:
> On 07-Oct-12 00:48, ref2401 wrote:
>> is there any Phobos function to calculate the next power of 2 of the
>> specified number?
>
> No though it's reinvented in a couple of places I think.
>
> Anyway this should work for unsigned numbers:
>
> import core.bitop;
> T nextPow2(T)(T x){
> return x == 0 ? 1 : 1^^(bsr(x)+1);
> }

That's right, apologies for my buggy suggestion.

Andrei