^^ implementation [Was: Re: Code speed]

[Justin Spahr-Summers]

On Wed, 14 Apr 2010 05:58:55 -0400, bearophile 
<bearophileHUGS at lycos.com> wrote:
> 
> Don:
> 
> >Raising to a float power is really a niche feature.<
> 
> Used it as x^^0.5 to perform the square root is not a niche feature, square roots are common enough.
> And sqrt is an intrinsic, it doesn't need all std.math.

I think I've only ever used a square root once, and that was to get the 
distance between two points. I'm not sure that square roots are common 
enough in general code to justify an implicit import (especially if we 
think of D in its context as a systems programming language).