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bug#25929: 25.2; map-delete doesn't delete permanently 1st alist elt
From: |
Lars Ingebrigtsen |
Subject: |
bug#25929: 25.2; map-delete doesn't delete permanently 1st alist elt |
Date: |
Wed, 22 Mar 2017 18:23:03 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/26.0.50 (gnu/linux) |
Stefan Monnier <monnier@IRO.UMontreal.CA> writes:
> The problem is how to make it extensible to user-defined types
> via something like cl-generic.el (e.g. add support for avl-tree.el
> without having to make map.el aware of avl-tree.el).
Hm... I haven't used cl-generic.el, but having map-delete be something
like this work?
(defmacro map-delete (map elem)
(if (symbolp map)
`(setq ,map (map-delete-1 ,map ,elem))
`(map-delete-1 ,map ,elem)))
And then having map-delete-1 be the thing to support user-defined types?
It'd be kinda an even more unusual Lisp construct, but, on the other
hand, I don't think Lisp has ever come up with an elegant way to express
these mutating functions before, so we're free to innovate. :-)
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
- bug#25929: 25.2; map-delete doesn't delete permanently 1st alist elt, (continued)
- bug#25929: 25.2; map-delete doesn't delete permanently 1st alist elt, Stefan Monnier, 2017/03/02
- bug#25929: 25.2; map-delete doesn't delete permanently 1st alist elt, Michael Heerdegen, 2017/03/03
- bug#25929: 25.2; map-delete doesn't delete permanently 1st alist elt, Michael Heerdegen, 2017/03/03
- bug#25929: 25.2; map-delete doesn't delete permanently 1st alist elt, Lars Ingebrigtsen, 2017/03/21
- bug#25929: 25.2; map-delete doesn't delete permanently 1st alist elt, Michael Heerdegen, 2017/03/22
- bug#25929: 25.2; map-delete doesn't delete permanently 1st alist elt, Lars Ingebrigtsen, 2017/03/22
- bug#25929: 25.2; map-delete doesn't delete permanently 1st alist elt, Noam Postavsky, 2017/03/22
- bug#25929: 25.2; map-delete doesn't delete permanently 1st alist elt, Lars Ingebrigtsen, 2017/03/22
- bug#25929: 25.2; map-delete doesn't delete permanently 1st alist elt, Michael Heerdegen, 2017/03/22
- bug#25929: 25.2; map-delete doesn't delete permanently 1st alist elt, Stefan Monnier, 2017/03/22
- bug#25929: 25.2; map-delete doesn't delete permanently 1st alist elt,
Lars Ingebrigtsen <=
- bug#25929: 25.2; map-delete doesn't delete permanently 1st alist elt, Stefan Monnier, 2017/03/22
- bug#25929: 25.2; map-delete doesn't delete permanently 1st alist elt, Stefan Monnier, 2017/03/22
- bug#25929: 25.2; plists and map-*, Lars Ingebrigtsen, 2017/03/29
- bug#25929: 25.2; plists and map-*, Nicolas Petton, 2017/03/29
- bug#25929: 25.2; map-delete doesn't delete permanently 1st alist elt, Nicolas Petton, 2017/03/21
- bug#25929: 25.2; map-delete doesn't delete permanently 1st alist elt, Stefan Monnier, 2017/03/21
- bug#25929: 25.2; map-delete doesn't delete permanently 1st alist elt, Nicolas Petton, 2017/03/21
- bug#25929: 25.2; map-delete doesn't delete permanently 1st alist elt, Stefan Monnier, 2017/03/21