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Re: real numbers and integer-expt.
From: |
Rob Browning |
Subject: |
Re: real numbers and integer-expt. |
Date: |
Wed, 20 Mar 2002 16:54:32 -0600 |
User-agent: |
Gnus/5.090006 (Oort Gnus v0.06) Emacs/21.1 (i386-debian-linux-gnu) |
Marius Vollmer <address@hidden> writes:
>> OK, that's a bit confusing -- we have SCM_COMPLEXP which does *not*
>> mean the same thing as scm_complex_p -- the former checks to make sure
>> the object, tag-wise, is a complex smob, the latter checks to see if
>> the object actually contains a complex number, so we have
>>
>> (complex? 3) -> #t
>>
>> but
>>
>> SCM_COMPLEX(SCM_MKINUM(3)) -> 0
>
> Yes, good point. I wasn't aware of that.
>
>
> I guess we need to first answer what the purpose of 'integer-expt' is.
> Given 'expt' is it useful to have 'integer-expt' as well? Is
> integer-expt really only for exact numbers and not for integers? Is
> it just a subset of 'expt' for use from C code?
All good questions. I get the impression that at least in part, it
was designed as a "helper" for use by other numbers.c functions.
--
Rob Browning
rlb @defaultvalue.org, @linuxdevel.com, and @debian.org
Previously @cs.utexas.edu
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