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bug#25929: 25.2; map-delete doesn't delete permanently 1st alist elt


From: Stefan Monnier
Subject: bug#25929: 25.2; map-delete doesn't delete permanently 1st alist elt
Date: Wed, 22 Mar 2017 13:04:32 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.0.50 (gnu/linux)

> I'm not quite sure what the objection to map-delete being a macro is...

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).


        Stefan





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