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Re: [RFC PATCH] Per-window face support

From: Stefan Monnier
Subject: Re: [RFC PATCH] Per-window face support
Date: Sun, 17 Jun 2018 16:51:57 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) 
> Sure. Part of the problem is that primitives like assq are hardcoded for
> eq-comparison,

We can change `assq` to use EQL: any code affected by this change is
fundamentally broken anyway (for the same reason that (defalias 'eq
#'eql) should be safe).

> We could add more primitives,

No need, on the contrary: by phasing out `eq` we reduce the traditional
3 forms of equality to just 2.


        Stefan
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