[Issue 5812] Power expression optimisation: constant fold (x^^0) = 1

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=5812



--- Comment #1 from Iain Buclaw <ibuclaw at ubuntu.com> 2011-04-04 11:32:56 PDT ---
You can also optimize:

x^^1  =>  (x)
x^^-1 =>  (1/x)

And that will remove two other scenarios from requiring std.math to compute the
result.

Regards

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