This is especially tricky, as there doesn't seem to be support for
indirect recursion, only direct recursion. As a consequence, its
important to have a single recursive pattern that handles all the
balanced delimiters in an expression context.
I've tried to add some comments to help explain this.
I also tried to add something to check that the balanced delimiters
*matched* and re-synchronize if they don't, but that didn't end up
working. I also tried various things to force re-synchronizing more
rapidly in the face of unbalanced delimiters but they all produced
strictly worse highlighting than what I have here. I will try again in
a follow-up commit, but for now this will work well enough for slides.
This required reworking how `=` and `;` were handled as well as more
general surgery on patterns.
This looks for initializers at the top level of parameters and at the
end of `var` or `let` declarations. It supports fancy nested `var`
patterns within `let` declarations, etc.
Co-authored-by: josh11b <josh11b@users.noreply.github.com>
There are still quite a few parts of the language that need support
here, but I've tried to piece together a decent foundation and address
some of the particular challenges with building a good framework that
handles some of the complex parts of the grammar such as successfully
identifying the declared names in even reasonably complex patterns.
I've included a pretty ad-hoc test file I've been using to make sure it
works. If folks want a particular testing strategy for this, happy to
explore building one although I don't really know what it should look
like.
Also happy to have suggestions about where this should live in the
repository. No strong opinions there. Hoping to eventually add
a `tmLanguage` file and any other syntax highlighting systems that are
useful.
I'll next be finishing off other parts of the language, and then I plan
to use this as a component of our presentation material, which is why
I'm focused on Highlight.js -- that's the system used most widely in
HTML-based presentation infrastructure like Reveal.js.
Co-authored-by: josh11b <josh11b@users.noreply.github.com>
Chandler Carruth
