[debbugs-tracker] bug#14871: closed (flonum procedures returning non-flonum objects)

[GNU bug Tracking System]

Your message dated Tue, 16 Jul 2013 04:53:49 -0400
with message-id <address@hidden>
and subject line Re: bug#14871: flonum procedures returning non-flonum objects
has caused the debbugs.gnu.org bug report #14871,
regarding flonum procedures returning non-flonum objects
to be marked as done.

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-- 
14871: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=14871
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--- Begin Message --- Subject: flonum procedures returning non-flonum objects Date: Mon, 15 Jul 2013 15:38:56 +0200 User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.4 (gnu/linux)

Hello schemers,

one property of the flonum procedures in r6rs is that they return
flonums. This should not happen:

scheme@(guile-user)> (import (rnrs))
scheme@(guile-user)> (fllog -1.0)
$1 = 0.0+3.141592653589793i
scheme@(guile-user)> (flsqrt -1.0)
$2 = 0.0+1.0i
scheme@(guile-user)> (flasin 3.0)
$3 = 1.5707963267948966-1.762747174039086i
scheme@(guile-user)> (flacos 3.0)
$4 = 0.0+1.762747174039086i
scheme@(guile-user)> (flexpt -1.0 0.5)
$5 = 6.123031769111886e-17+1.0i

These results are not flonums. In r6rs-lib it says "the result may be a
NaN or some unspecified flonum." So returning +nan.0 would be better.
Tested with Guile 2.0.9.22-7e816-dirty.

Regards,

-- 
Göran Weinholt <address@hidden>
"Today's scientists have substituted mathematics for experiments, and they 
wander
off through equation after equation, and eventually build a structure which has
no relation to reality." -- Nikola Tesla

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--- End Message ---

> --- Begin Message ---
>
>
>
> Subject: 
>
> Re: bug#14871: flonum procedures returning non-flonum objects
>
>
>
>
> Date: 
>
> Tue, 16 Jul 2013 04:53:49 -0400
>
>
>
>
> User-agent: 
>
> Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux)
>
>
>
>
> Göran Weinholt <address@hidden> writes:
>
> > one property of the flonum procedures in r6rs is that they return
> > flonums. This should not happen:
> >
> > scheme@(guile-user)> (import (rnrs))
> > scheme@(guile-user)> (fllog -1.0)
> > $1 = 0.0+3.141592653589793i
> > scheme@(guile-user)> (flsqrt -1.0)
> > $2 = 0.0+1.0i
> > scheme@(guile-user)> (flasin 3.0)
> > $3 = 1.5707963267948966-1.762747174039086i
> > scheme@(guile-user)> (flacos 3.0)
> > $4 = 0.0+1.762747174039086i
> > scheme@(guile-user)> (flexpt -1.0 0.5)
> > $5 = 6.123031769111886e-17+1.0i
> >
> > These results are not flonums. In r6rs-lib it says "the result may be a
> > NaN or some unspecified flonum." So returning +nan.0 would be better.
>
> Fixed in ad922d065c5f8b01c4ace3ee34d26300409e44fa.
>
>     Thanks!
>       Mark
>
>
> --- End Message ---