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(* 0 +inf.0) ==> +nan.0
...
(/ 0 0.0) ==> unspecified
(/ 0.0 0) ==> +nan.0
(/ 0.0 0.0) ==> +nan.0
Why is only (/ 0 0.0) out of this set unspecified?
How should (/ 0 0) behave?
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The description of `+' and `*' says:
If any of these procedures are applied to mixed non-rational real
and non-real complex arguments, they either report a violation of
an implementation restriction or return an unspecified number.
The only non-rational real numbers in current implementations are
+inf.0 and -inf.0. Is this what was intended?
If so, calling them infinities would be less cryptic.
Shouldn't that sentence also appear in the description of `-' and `/'?
It allows return of "an unspecified number." Does that allow a NaN to
be returned?