Re: (atan 0 x) with gauche 0.9.14

Shiro Kawai <[email protected]> writes:

> Fix pushed.  Also realized that (atan 0.0 0) and (atan -0.0 0) need a
> special treatment (the second arg is exact).

Thanks!

Total: 39739 tests, 39739 passed,     0 failed,     0 aborted.

gosh$ (gauche-version)
"0.9.14-p1"
gosh$ (radians->degrees (atan 0 -1))
180.0

Greetings
Jens

PS: at the moment I don't really want to follow into the (atan ±0 ±0)
rabbit hole but:

gosh$ (atan 0 0)
+nan.0

scheme@(guile-user)> (atan 0 0)
$16 = 0.0

emacs
(atan 0 0)
0.0

sbcl
* (atan 0 0)
0.0

chicken
#;1> (atan 0 0)
0.0

C
atan2(0,0)
0.0

maxima:
(%i1) atan2(0,0);

atan2: atan2(0,0) is undefined.


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