Re: Call for volunteers: add tree-sitter support to major modes

[Theodor Thornhill]

On 11 October 2022 07:14:36 CEST, Yuan Fu <casouri@gmail.com> wrote:
>
>
>> On Oct 10, 2022, at 9:43 PM, Po Lu <luangruo@yahoo.com> wrote:
>> 
>> Theodor Thornhill <theo@thornhill.no> writes:
>> 
>>> My suggestion is to add the tree-sitter variant in these cases, and let
>>> the other modes die a slow, deprecated death down the line.
>> 
>> In that case, will any of you object if someone writes a parser
>> generator in C and an implementation of the tree-sitter runtime library
>> that can be included with Emacs itself (namely, with the copyright
>> assigned to the FSF?)
>> 
>> They will be able to use any existing tree-sitter grammar, of course.
>
>Tree-sitter library and the “official” language definitions are all MIT 
>licensed. So nothing prevents us from including it copyright-wise.
>
>> 
>> My opinion is that Emacs should not degrade its text editing
>> capabilities so drastically if a non-system library (i.e. not ncurses or
>> Xlib) is not present.
>
>Considering that Emacs currently doesn’t have C# and typescript support in 
>core at all, I wouldn’t call it a downgrade. But I agree the idea that a major 
>mode requiring external dependency to function is not very comfortable.
>

There's no issue with adding cc mode c# support in core, as the copyright is 
sorted for it. However, that will create maintenance burden for Alan, as he has 
the most knowledge on its inner workings. 

If we want I can prepare a patch with both, in the style of js-mode. 

What do you think? 
Theodor