[armedbear-devel] long

[Alan Ruttenberg]

On Mar 16, 2010, at 8:47 AM, dmiles at users.sourceforge.net wrote:

> This is because ABCL:
> Fixnum => int
> Bignum => BigInteger
> 
> ABCL does not have a 'long' type so it is normal workaround to produce
> a new 'long in your case.
> 
> So depends who is desiring: There is no real spec other than Allegro
> http://www.franz.com/support/documentation/8.0/doc/jlinker.htm#data=types-conversions-3
> But Allegro spec here is lossy..
> (meaning if you went from a Lisp Bignum->Java->Lisp.. the number would
> scaled back to Long.MAX_VALUE)  So their spec is even more
> undesirable.

Agreed.

> It would be possible that when the Bignum is within normal java long
> range the javaInstance() could return a java.lang.Long instead.
> 
> Does everyone think this would be better behavior than current ABCL and Allegro?

I'm thinking it would be. However, given that there is a workaround I wouldn't put it as high priority - more as a cleanup. 

-Alan

> 
> 
> On Mon, Mar 15, 2010 at 11:47 PM, Alan Ruttenberg
> <alanruttenberg at gmail.com> wrote:
>> 
>> Am I right to observe that abcl coerces any number > fixnum size to bigint?
>> I'm having trouble calling a java method that takes a long. I seem to
>> have worked around it calling the method with (new 'long
>> "9223372036854775807") rather than 9223372036854775807 .
>> 
>> Is this the desired behavior?
>> 
>> -Alan
>> 
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