From: Joost Kremers <joost.m.kremers@gmail.com>
To: help-gnu-emacs@gnu.org
Subject: Re: Concern around use of eval
Date: 19 Mar 2015 08:12:04 GMT [thread overview]
Message-ID: <slrnmgl16k.6n4.joost.m.kremers@j.kremers4.news.arnhem.chello.nl> (raw)
In-Reply-To: mailman.2302.1426752018.31049.help-gnu-emacs@gnu.org
Tassilo Horn wrote:
> Well, in case the `lh/label' value is available at compile-time then
> `lh/define-predicates' can also be a macro and you can go like this:
>
> --8<---------------cut here---------------start------------->8---
> (defvar lh/labels '("label1" "label2" "label3"))
>
> (defmacro lh/gen-predicate (label)
> `(defun ,(intern (concat "lh/" label "-p")) ()
> (member ,label *lh/system-label-store*)))
>
> (defmacro lh/define-predicates ()
> `(progn
> ,@(mapcar (lambda (label)
> `(lh/gen-predicate ,label))
> lh/labels)))
>
> (lh/define-predicates)
> --8<---------------cut here---------------end--------------->8---
Why not do it at the top level directly? E.g.:
,----
| (defvar lh/labels '("label1" "label2" "label3"))
|
| (defmacro lh/gen-predicate (label)
| `(defun ,(intern (concat "lh/" label "-p")) ()
| (member ,label *lh/system-label-store*)))
|
| (mapc (lambda (label)
| (lh/gen-predicate label))
| lh/labels)
`----
--
Joost Kremers joostkremers@fastmail.fm
Selbst in die Unterwelt dringt durch Spalten Licht
EN:SiS(9)
next prev parent reply other threads:[~2015-03-19 8:12 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-19 6:53 Concern around use of eval Les Harris
2015-03-19 8:00 ` Tassilo Horn
[not found] ` <mailman.2302.1426752018.31049.help-gnu-emacs@gnu.org>
2015-03-19 8:12 ` Joost Kremers [this message]
2015-03-19 8:31 ` Tassilo Horn
[not found] ` <mailman.2305.1426753885.31049.help-gnu-emacs@gnu.org>
2015-03-20 19:54 ` Joost Kremers
2015-03-19 14:07 ` Stefan Monnier
2015-03-20 15:17 ` Thierry Volpiatto
2015-03-20 17:19 ` Bug in Elisp font-locking (was: Concern around use of eval) Tassilo Horn
2015-03-20 17:31 ` Bug in Elisp font-locking Stefan Monnier
2015-03-20 17:43 ` Drew Adams
2015-03-20 18:47 ` Tassilo Horn
2015-03-20 20:38 ` Stefan Monnier
2015-03-20 22:45 ` Tassilo Horn
2015-03-21 0:06 ` Johan Bockgård
2015-03-21 7:26 ` Tassilo Horn
2015-03-21 2:33 ` Stefan Monnier
2015-03-21 7:55 ` Tassilo Horn
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