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bug#53817: 28.0.91; sh-mode indent misses on 'if test; then' when 'then'
From: |
Stefan Monnier |
Subject: |
bug#53817: 28.0.91; sh-mode indent misses on 'if test; then' when 'then' is on 'if' line |
Date: |
Sun, 06 Feb 2022 19:11:23 -0500 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) |
> (defun sh-smie--default-backward-token ()
> [...]
> (progn (skip-syntax-backward ".w_'")
> (or (not (zerop (skip-syntax-backward "\\")))
> (when (eq ?\\ (char-before (1- (point))))
>
> Semi-colons have punctuation syntax, so we're skipping back over the
> entirety of "test;then" instead of stopping after "then".
We should indeed only skip over "then", and then only over ";" and then
only over "test".
> This looks easy enough to fix, but the overall logic of that function is
> somewhat obscure to me, so I've added Stefan to the comments; perhaps he
> has some comments.
The sh syntax is fairly nasty to parse, especially backwards, so I can't
give you any general comment here. I'd try something and then see if it
breaks any tests (including looking at test/manual/indent/shell.sh).
For sure, I'd recommend adding a regression test.
Stefan