mh5l+@ANDREW.CMU.EDU ("Mohammed M. Hakim") (04/09/91)
I am currently working on developing a system that will require the user to save the instances he/she created on top of a pre-defined classes. Does any one know of any utility in the public domain that can be used to keep track of the instances created and later parse them on a file for future use? I would appreciate any suggestions regarding the best way to do such task. Do I really need to keep track of every instance made and then later on parse a clos code to a file that reads like: (make-instance ... (make-instance ... .. for future use. Or is there anyway around this? Maher Hakim mh5L@andrew.cmu.edu
mdb@zero.arc.ab.ca (Mark Brinsmead) (04/09/91)
In article <gc0_Ia600iQ5E_z0Q=@andrew.cmu.edu>, mh5l+@ANDREW.CMU.EDU ("Mohammed M. Hakim") writes: |> I am currently working on developing a system that will require the user |> to save the instances he/she created on top of a pre-defined classes. |> Does any one know of any utility in the public domain that can be used |> to keep track of the instances created and later parse them on a file |> for future use? |> I would appreciate any suggestions regarding the best way to do such |> task. Do I really need to keep track of every instance made and then |> later on parse a clos code to a file that reads like: |> (make-instance ... |> (make-instance ... |> .. |> for future use. Or is there anyway around this? |> |> Maher Hakim |> mh5L@andrew.cmu.edu It just so happens that I *do* have such an animal. It is basically a set of methods which will traverse an arbitrary tree of LISP/CLOS structures (including instances, hash-tables, arrays, strings, symbols, and numbers) and save them to a file in the form of lisp source code which, when executed, will re-create the structure(s) fully preserving EQ'ness throughout the hierarchy. It works (should work) for circular structures, and should be portable to almost any common lisp using an up-to-date version of PCL. Because it is based on PCL, there is no support for saving instances of structures defined with defstruct. The code has been used (a bit) and should work, but comes without any sort of warrantee or promises, WHATSOEVER. The only hitch is that I'm not sure whether I am allowed to release this code to the public. I shall begin investigating that issue now; in the meantime, anyone interested in getting a copy should e-mail me so I can decide whether there is sufficient interest to justify posting this to the net. (Assuming, of course, that I am allowed to!) In the worst case, I can probably make the *design* available. That ought to give you enough information to build one of these beasties yourself. -- Mark Brinsmead, Advanced Computing and Engineering Department, Alberta Research Council. internet: mdb@arcsun.arc.ab.ca --or-- mdb@[128.144.1.3] telephone: (403) 297-2600
pat@computer-science.strathclyde.ac.uk (04/10/91)
I'll have one please Mark.
mdb@arcsun.arc.ab.ca (Mark Brinsmead) (04/11/91)
[...]
The only hitch is that I'm not sure whether I am allowed to release
this code to the public. I shall begin investigating that issue now;
in the meantime, anyone interested in getting a copy should e-mail me
so I can decide whether there is sufficient interest to justify posting
this to the net. (Assuming, of course, that I am allowed to!)
[...]
I'd sure be interested in seeing it.
Bruce S. Seely
Rockwell International Science Center
P.O. Box 1085
Thousand Oaks, CA 91358
(805) 373-4142
bss@risc.rockwell.comgeorge@hsvaic.boeing.com (George Williams) (04/11/91)
[...] > The only hitch is that I'm not sure whether I am allowed to release > this code to the public. I shall begin investigating that issue now; > in the meantime, anyone interested in getting a copy should e-mail me > so I can decide whether there is sufficient interest to justify posting > this to the net. (Assuming, of course, that I am allowed to!) [...] I'd like a copy! BTW, Mark: I tried replying via e-mail, but it bounced. George Williams Boeing Computer Services Internet: george@hsvaic.boeing.com POBox 240002, M/S JY-58 UUCP: ...!uw-beaver!bcsaic!hsvaic!george Huntsville AL 35824-6402 Phone: 205+464-4968 FAX: 205+464-4930 BTN: 464-4968