[r6rs-discuss] [Formal] Clarification of chapter 1 overview bits re: exactness and complex numbers

Michael Sperber sperber at informatik.uni-tuebingen.de
Thu Jan 25 11:52:48 EST 2007


John Cowan <cowan at ccil.org> writes:

> Michael Sperber scripsit:
>
>> (The report doesn't really mandate exact complex numbers anymore as of
>> the 5.92 draft.)
>
> Say what?  9.9.1 includes make-rectangular among the procedures that
> "must return the correct exact result provided all their arguments are
> exact".  Furthermore, the token "1+i" must represent an exact number.

Whoops, you're right.  Sorry about that.

> And why on earth would the requirement for exact complex numbers be
> dropped?

Because I had incorrectly believed the only place it was encoded was
in the section on the (r6rs arithmetic exact) library, which got
deleted since the 5.91 draft.

-- 
Cheers =8-} Mike
Friede, Völkerverständigung und überhaupt blabla



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