Re: Make all tree-sitter modes optional

[Dmitry Gutov]

On 16/02/2023 09:53, Theodor Thornhill wrote:
> To me the last point here is the important one. We kinda "rushed" the modes in 
> so that the treesit backend would have anything to show for in emacs-29. We've tried many 
> times to devise a mechanism for it to be unintrusive, and definitely so for the cc mode 
> equivalents. Yes they are far behind them in some respects, so there was never a point to 
> make them the default for the foreseeable future.

Nobody is arguing about whether the modes should be default at the moment.

> (make-language-layer 'js-layer
>    :major-mode 'js-ts-mode
>    :lsp 'eglot
>    :dagnostics 'flymake)

If we do something like that, I'd rather we try for a scheme where we 
don't need to enumerate the "swappable" features in advance -- aside 
from the major mode, of course. But Eglot and friends plug into a 
language through indirection.

Other than that, the user still needs to 'M-x eglot' or 'M-x lsp', or 
enable global-flycheck-mode, so the declarations like above seem redundant.

To clarify, the example above looks nice, but there are a lot more 
programming related minor modes than the LSP clients and Flymake/Flycheck.