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bug#60176: 29.0.60; Fallback file variable mode if treesitter is not usa
From: |
Juri Linkov |
Subject: |
bug#60176: 29.0.60; Fallback file variable mode if treesitter is not usable |
Date: |
Mon, 19 Dec 2022 19:29:13 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/30.0.50 (x86_64-pc-linux-gnu) |
>> So to completely cover all needs, 'major-mode-remap-alist' should
>> support a predicate as well. For example,
>>
>> (setq major-mode-remap-alist '((c-mode #'treesit-available-p c-ts-mode)))
>
> I think the idea is that this should happen by default, not as a
> (not-so-trivial) customization by the users.
Then 'c-ts-mode' should fall back to 'c-mode' when treesit is not available?
Like this:
```
diff --git a/lisp/progmodes/c-ts-mode.el b/lisp/progmodes/c-ts-mode.el
index cf941236f82..5004b9a5e1d 100644
--- a/lisp/progmodes/c-ts-mode.el
+++ b/lisp/progmodes/c-ts-mode.el
@@ -616,7 +616,7 @@ c-ts-mode
(define-derived-mode c-ts-mode c-ts-base-mode "C"
(unless (treesit-ready-p 'c)
- (error "Tree-sitter for C isn't available"))
+ (c-mode))
(treesit-parser-create 'c)
```