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bug#28747: 26.0.60; Usage of "&rest body" in Edebug specs
From: |
Stefan Monnier |
Subject: |
bug#28747: 26.0.60; Usage of "&rest body" in Edebug specs |
Date: |
Sat, 29 Jan 2022 18:25:55 -0500 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) |
> The symbol &rest in an Edebug spec has a different meaning than it has
> in an argument list.
Definitely, yes.
Note that `&optional` is different "in the same way".
> In particular, "&rest body" in an Edebug spec is
> erroneous usage because it is asking Edebug to match something that
> can match nothing (body) as many times as it can, which makes an
> infinite loop.
Only idiots would get caught making such rookie mistakes.
> Here are the macros I've found that have this incorrect usage of &rest
> in their Edebug specs:
>
> crm--completion-command
> easy-mmode-define-navigation
> inline--letlisteval
> inline--leteval
> ses--letref
See: only idiots.
> Does anyone have thoughts on the idea of adding &repeat as a synonym
> for &rest in Edebug specs, with the goal of moving &rest towards
> obsolescence eventually?
I like the idea. Only problem I can see is that it doesn't
solve the problem for `&optional`.
Stefan