issue 7006 - std.math.pow (integral, integral) crashes on negative exponents

[Ola Fosheim Grøstad]

On Monday, 16 December 2019 at 17:07:42 UTC, Ola Fosheim Grøstad 
wrote:
> On Monday, 16 December 2019 at 15:33:33 UTC, jmh530 wrote:
>> void main() {
>>     auto x = iota(10).map!(a => a % 2 ? 1 : -1);
>> }
>
> xor or unrolling would be faster. I wouldn't trust a compiler 
> on that one.

To explain, in case that was a bit brief (8 bit case):

-1 = 11111111
1   = 00000001

So all you have to do is xor with

~1 = 11111110