[CM] Two LISP Questions

cristopher pierson ewing cewing@u.washington.edu
Sat, 7 Sep 2002 14:27:13 -0700 (PDT)

Hello all,

Two questions,

1.  Has anybody else noticed that CLISP doesn't seem to have the function
(change-class) implemented?  Is my version screwy in some way?

2.  In common lisp, is there a function or anything that one can use to
find out what type of lisp is being used?  I have created two types of
objects to store time-code values, one in HH:MM:SS.SS format, and one in
SMPTE format HH:MM:SS:FRAMES.  I have also created two types of ways to
convert one to the other, in ACL i have a "change-class" that properly
converts frames to fractions of seconds and the same in reverse, and since
CLISP doesn't seem to implement change-class (see above) a method for each
object type that returns an object of the opposite type.  I would like to
be able to query the lisp system to find out what type of lisp is being
used so that I can decide intelligently which to use in a given situation,
but I can't figure out what to use to find this out.

Any ideas?


Cris Ewing
CARTAH Assistant
University of Washington
Home Phone: (206) 365-3413
E-mail: cewing@u.washington.edu