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bug#43489: [PATCH] Don't signal scan-error when moving by sexp interacti
From: |
Lars Ingebrigtsen |
Subject: |
bug#43489: [PATCH] Don't signal scan-error when moving by sexp interactively |
Date: |
Fri, 18 Sep 2020 15:13:21 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) |
Mattias Engdegård <mattiase@acm.org> writes:
> When moving by sexp (C-M-f, C-M-u and so on) and point is already at a
> boundary preventing further movement, Emacs currently signals an
> internal error such as
>
> Scan error: "Containing expression ends prematurely", 5010, 5010
>
> or
>
> Scan error: "Unbalanced parentheses", 5010, 1
>
> which is unhelpful and rather looks as if something went wrong in the
> internal machinery.
Yes, those error messages are confusing in interactive usage.
> The attached patch does away with this error when the commands are
> invoked interactively; programmatic use of the functions will get the
> scan-error just like before. There didn't seem to be much point in
> replacing the errors with new messages so the current version of the
> patch doesn't.
[...]
> + (if noerror
> + (condition-case _
> + (forward-list arg nil)
> + (scan-error (ding)))
So you basically just `ding' in interactive usage?
I wonder whether this would have any negative effect when people are
using these commands in keyboard macros. For instance, if you've
recorded a macro that does `M-C-f M-DEL' or something, previously it
would signal an error and then stop, while now it'll just continue and
delete the wrong thing?
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
- bug#43489: [PATCH] Don't signal scan-error when moving by sexp interactively, Mattias Engdegård, 2020/09/18
- bug#43489: [PATCH] Don't signal scan-error when moving by sexp interactively,
Lars Ingebrigtsen <=
- bug#43489: [PATCH] Don't signal scan-error when moving by sexp interactively, Mattias Engdegård, 2020/09/18
- bug#43489: [PATCH] Don't signal scan-error when moving by sexp interactively, Lars Ingebrigtsen, 2020/09/18
- bug#43489: [PATCH] Don't signal scan-error when moving by sexp interactively, Mattias Engdegård, 2020/09/18
- bug#43489: [PATCH] Don't signal scan-error when moving by sexp interactively, Lars Ingebrigtsen, 2020/09/19
- bug#43489: [PATCH] Don't signal scan-error when moving by sexp interactively, Mattias Engdegård, 2020/09/20
- bug#43489: [PATCH] Don't signal scan-error when moving by sexp interactively, Lars Ingebrigtsen, 2020/09/20
- bug#43489: [PATCH] Don't signal scan-error when moving by sexp interactively, Mattias Engdegård, 2020/09/21