Path: utzoo!mnetor!uunet!lll-winken!lll-lcc!ames!pasteur!ucbvax!ucsfcgl!yee
From: yee@cgl.ucsf.edu (dave yee)
Newsgroups: comp.lang.lisp
Subject: query 'bout defstruct (Common LISP)
Message-ID: <10834@cgl.ucsf.EDU>
Date: 30 Apr 88 00:21:27 GMT
Organization: UCSF Computer Graphics Lab
Lines: 34
Keywords: defstruct, symbols, confusion


Hi there,

i have an easy question for you LISP experts...
First of all, i'm using common LISP.


i would like to define a data structure using defstruct.  
For example:
  (defstruct (piece)
	     (is-viable t)
	     (coord-x   0)
	     (coord-y   0)
	     (coord-z   0))

so far, so good.  Now for the tricky part.  I will have a variable
number of "pieces" at any given time in the program.
So i would like the computer to
generate new symbols for me.  The new symbols would then
be used as names for the new pieces. 

Now, i figured i could use "gentemp" to make the symbols,
but i can't "setq" these new symbols (i.e.
(setq (gentemp) (make-piece)) just doesn't cut it...

Anyone have any suggestions?  Is there anotyher way i can
have the program create new symbols which could be
used in this way?

any suggestions would be appreciated...
-- 
-dave: 
      ARPA:   yee@cgl.ucsf.edu         "Language is a 
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