Re: Raising negative numbers to an inexact integer

[Andy Wingo]

On Mon 31 Jan 2011 21:26, Mark H Weaver <address@hidden> writes:

> For example, although (expt -1.0 2) yields 1.0, (expt -1 2.0) yields
> 1.0+0.0i, which is not `real?' according to the R6RS.  The R6RS requires
> that `real?' return #t only if the imaginary part is an _exact_ 0.
>
> Note that operations requiring reals, including the comparison operators
> `<', '>', '<=' and '>=' will raise an exception if applied to these
> numbers.  However, I made sure that `inexact->exact' would ignore an
> inexact zero imaginary part.
>
> I don't expect this to be a problem, since anyone raising a negative
> number to an inexact power should expect that the result may not be
> real.
>
> What do you think?

Sounds sane to me.

Andy
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