Add support for the contents of yew's html! macro

[ChrisRenfrow]

Yew, a front-end web-framework for Rust similar to React, contains a html! macro for writing HTML and SVG code declaratively. I believe it makes sense to add support for these blocks in tree-sitter-rust, just as tree-sitter-javascript supports JavaScript syntax extension (jsx) to a similar end.

Here is Yew's documentation on how the grammar within html! differs from proper HTML.

While I've never written my own tree-sitter grammar, I am more than willing to take-on the implementation of this enhancement. If anybody has some time to spare I would appreciate some pointers on how to get started, otherwise I'm sure I can manage on my own. :)
My availability has changed since I proposed this change and I can no longer contribute as I had offered.

[carloskiki]

I think this could be even more general and work with the syn_rsx crate for example. I have never written any tree-sitter grammar and I don't know how we would detect when rsx/html is used. I know multiple rust web frameworks would benefit from this.

[amaanq]

It's popular, sure, but not something to be added in the main grammar. You can try to implement injections similar to how nvim-treesitter does it instead

If this were to be added, then adding every other "style" of macros for any semi popular lib will be advocated for as this would set a precedence. So for that reason, it shouldn't be added

[igor-ribeiro]

@ChrisRenfrow can you share your grammar?

[ChrisRenfrow]

My apologies, I haven't started anything in regards to this issue and I don't have the time to contribute as I previously indicated. If anyone with the time to commit to this task would like to pick it up they're more than welcome to do so!

[igor-ribeiro]

@ChrisRenfrow actually, my bad, I read "While I've HAVE written my own tree-sitter grammar..." 🤦🏽‍♂️