From: Andrea Corallo <acorallo@gnu.org>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: emacs-devel@gnu.org
Subject: Re: feature/type-hierarchy 8a63e50036f 1/5: * Define 'cl--type-hierarchy' and compute 'cl--typeof-types' from it
Date: Fri, 01 Mar 2024 13:12:58 -0500 [thread overview]
Message-ID: <yp1h6hp3jo5.fsf@fencepost.gnu.org> (raw)
In-Reply-To: <jwvil25ly30.fsf-monnier+emacs@gnu.org> (Stefan Monnier's message of "Fri, 01 Mar 2024 11:49:38 -0500")
Stefan Monnier <monnier@iro.umontreal.ca> writes:
>> -(defconst cl--typeof-types
>> - ;; Hand made from the source code of `type-of'.
>> - '((integer number integer-or-marker number-or-marker atom)
>> - (symbol-with-pos symbol atom) (symbol atom) (string array sequence atom)
> [...]
>> +(defconst cl--type-hierarchy
> [...]
>> + (symbol keyword boolean symbol-with-pos)
> [...]
>> + (symbol-with-pos keyword))
>
> How did you come up with `cl--type-hierarchy`?
> Because, obviously, something changed here.
> How is `keyword` a "direct subtype" of `symbol-with-pos`?
Hi Stefan,
Can't we have keyword that is a symbol-with-pos as well?
>> +(defconst cl--direct-supertypes-of-type
>> + (make-hash-table :test #'eq)
>> + "Hash table TYPE -> SUPERTYPES.")
>> +
>> +(defconst cl--direct-subtypes-of-type
>> + (make-hash-table :test #'eq)
>> + "Hash table TYPE -> SUBTYPES.")
>> +
>> +(cl-loop for (parent . children) in cl--type-hierarchy
>> + do (cl-loop
>> + for child in children
>> + do (cl-pushnew parent (gethash child cl--direct-supertypes-of-type))
>> + do (cl-pushnew child (gethash parent cl--direct-subtypes-of-type))))
>
> FWIW, I think we should create a "type descriptor" defstruct (from which
> `cl--class` would inherit), and generalize the `cl--class` symbol
> property to one that holds the type descriptor of the given name.
>
> So you could get the direct parents of `integer` with something like:
>
> (slot-value (get 'integer 'cl--class) 'parents)
>
> [ And then `C-h o integer RET` should show the corresponding info. ]
SGTM, I'm not very accustomed to this area of the code tho.
>> +(defconst cl--typeof-types nil
>
> This can't make sense.
> If you change it later with `push/setq` it should not be a "defconst".
> So either arrange to compute its default value directly inside the
> `defconst`, or use a `defvar`.
Ops done.
>> +(maphash (lambda (type _)
>> + (push (cl--supertypes-for-typeof-types type) cl--typeof-types))
>> + cl--direct-supertypes-of-type)
>
> Did you compare the resulting alist to the one we had before?
> Remember that the order of "(direct or not) supertypes" in there is
> important.
> The current table has errors. I see for example:
>
> (fixnum integer integer-or-marker number atom number-or-marker)
>
> where `atom` should come *after* `number-or-marker`.
Yes I did it but I missed this sorry. I wish this was catch-ed in the
two weeks this branch stayed in review. Okay in my todo list now for
the weekend :)
Thanks
Andrea
next prev parent reply other threads:[~2024-03-01 18:12 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <170801660982.26727.13226947668211497607@vcs2.savannah.gnu.org>
[not found] ` <20240215170330.82819C0F009@vcs2.savannah.gnu.org>
2024-03-01 16:49 ` feature/type-hierarchy 8a63e50036f 1/5: * Define 'cl--type-hierarchy' and compute 'cl--typeof-types' from it Stefan Monnier
2024-03-01 18:12 ` Andrea Corallo [this message]
2024-03-01 18:59 ` Stefan Monnier
2024-03-03 8:51 ` Andrea Corallo
2024-03-03 14:21 ` Stefan Monnier
2024-03-03 18:34 ` Andrea Corallo
2024-03-03 20:41 ` Stefan Monnier
2024-03-04 9:16 ` Andrea Corallo
2024-03-04 15:37 ` Stefan Monnier
2024-03-04 16:12 ` Andrea Corallo
2024-03-04 16:35 ` Stefan Monnier
2024-03-03 16:56 ` Andrea Corallo
2024-03-03 17:31 ` Stefan Monnier
2024-03-03 18:05 ` Andrea Corallo
2024-03-03 18:20 ` Stefan Monnier
2024-03-03 18:37 ` Andrea Corallo
2024-03-03 20:42 ` Stefan Monnier
2024-03-04 9:24 ` Andrea Corallo
2024-03-04 15:51 ` Stefan Monnier
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=yp1h6hp3jo5.fsf@fencepost.gnu.org \
--to=acorallo@gnu.org \
--cc=emacs-devel@gnu.org \
--cc=monnier@iro.umontreal.ca \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this external index
https://git.savannah.gnu.org/cgit/emacs.git
https://git.savannah.gnu.org/cgit/emacs/org-mode.git
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.