Re: pi seems not to be a constant

I should have remembered about pi being recomputed.

  > Conformity could be restored by having CL:PI defined as a constant
  > variable bound to double-float, and to have another variable EXT:PI
  > bound to the changing long-float value.

  Would still be not conforming.

Although the suggestion above would not be strictly conforming, I
think it would be an improvement in that (let (pi)) would signal an
error and constantp would return the expected result.

I was also wondering about (constantp '(+ 1 pi2)) returning t
but (constantp '(sin pi2)) returning nil.
But I recognize this is conforming.


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