Parsing problems are always a good guess with XSB -- however **/2 can be
added to the reader.
XSB Version 3.1 (Incognito) of August 10, 2007
[i386-apple-darwin8.9.1; mode: optimal; engine: slg-wam; gc: indirection;
sched\
uling: local]
| ?- X is e**pi.
X = 23.1407
The problem is that binary functions are a little awkward to add to our
compiler, so it turns out that with my simple patches, exp/2 or **/2 works
from the command line, but not in compiled code (I need to fix this).
Anyway, we should think about making it easier to add binary functions --
XSB supports all of the other binary functions from the core standard (I
think) as well as min/2 and max/2. But we do need to add **/2 and we
might as well add log/2, gcd/2, and ></2 from the revision while we're at
it. I'll try to get that in over the next couple of days.
Terry
PS pi/0 and e/0 work fine from the command line now, I'll try to get them
into the compiler over the next couple of days.
On Sun, 21 Oct 2007, Paulo Moura wrote:
>
> Hi!
>
> While running some compatibility tests, I found that the current XSB
> CVS version does not define the the ISO operator (**)/2 - power,
> although there is a exp/2 evaluable function that seems to provide
> the same functionality. Can the (**)/2 operator be added to the CVS
> version or is there some (parsing ?) problem with it that I'm not
> foreseeing?
>
> Cheers,
>
> Paulo
>
>
> -----------------------------------------------------------------
> Paulo Jorge Lopes de Moura
> Dep. of Computer Science, University of Beira Interior
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>
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> Research: <http://logtalk.org/>
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