RBS Inline Syntax Highlighting

[marcoroth]

I've been trying to bring this feature over to Zed: Shopify/ruby-lsp#3215

Here are some Tree Sitter Queries to match the comments:

; RBS Inline: #: syntax
((comment) @content
  (#match? @content "^#:")
  (#set! "language" "rbs"))

; RBS Inline: #| continuation syntax
((comment) @content
  (#match? @content "^#\\|")
  (#set! "language" "rbs"))

; RBS Inline: # @rbs syntax
((comment) @content
  (#match? @content "^#\\s*@rbs")
  (#set! "language" "rbs"))

I tried adding them to languages/ruby/injections.scm, tried to unmatch the RBS Inline comments languages/ruby/overrides.scm and languages/ruby/highlights.scm but I couldn't get it to work.

Also using (#set! injection.language "rbs")) and uppercase "RBS" doesn't work either. Initially I thought we might have to use #offset to make sure are strip out the #:, #|, or # @rbs but it doesn't seem to make a difference.

But maybe I'm missing something to make it work, which is why I'm opening this issue.

[marcoroth]

I just realized, that the RBS Inline Syntax is only partial RBS syntax. Currently, it also doesn't highlight it in RBS directly, which explains why it doesn't work with the injections. So we probably need to update the RBS grammer itself.