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Are "proper" closures used in Emacs sources?

From: Marcin Borkowski
Subject: Are "proper" closures used in Emacs sources?
Date: Tue, 12 Jan 2021 14:50:24 +0100
User-agent: mu4e 1.1.0; emacs 28.0.50

Hi all,

it's been quite some time since lexical binding was introduced to
Elisp.  Apart from possible optimizations and being less error-prone, it
allows for all the cool tricks with closures.  Are there any places in
Emacs core where "proper" closures are actually used?  (By "proper",
I mean closures with non-empty lexical environment, actually using said


Marcin Borkowski

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