GNU bug report logs - #26073
How should cl-symbol-macrolet interact with rebindings?

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From: Stefan Monnier <monnier <at> IRO.UMontreal.CA>
To: Philipp Stephani <p.stephani2 <at> gmail.com>
Cc: 26073 <at> debbugs.gnu.org, Paul Pogonyshev <pogonyshev <at> gmail.com>
Subject: bug#26073: workaround
Date: Thu, 28 Sep 2017 16:09:53 -0400

> At least the docstring of `with-slots' and the EIEIO manual both state:
> "Both ‘setf’ and ‘setq’ can be used to set the value of the slot." In
> particular, it doesn't state that `let' can be used for this purpose. So as
> long as `setf' and `setq' continue working, I think it should be OK to
> change the behavior (it should still be documented as incompatible Lisp
> change though).

Right, the interaction with `let` is not documented, but some packages
may still rely on it.  What this means is that fixing bug#26073 for
Emacs-26 may require introducing a second cl-symbol-macrolet so as not
to risk breaking packages using the old semantics.

I think for `master` it's OK to just change cl-symbol-macrolet (and risk
breaking other packages).


        Stefan

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