[jlongster]

That really only applies to `define-macro` style macros. You can have syntax-case style macros if the language can disambiguate reading and parsing, which a lot of them have trouble with, and why they don't support them.

sweet.js figured out how to do that in javascript, so we have full syntax-case macros just as easily.

[swannodette]

Wait so does sweet.js support arbitrary JS execution in macros now?

[jlongster]

Not yet, but it's theoretically possibly with all the groundwork that's already been done. See https://github.com/mozilla/sweet.js/issues/12

So I should have said syntax-rules (for now). My bad!

[swannodette]

Seems like you would still need to provide something like syntax objects and a special API to manipulate them?

[jlongster]

This involves a longer discussion, and I'm not sure what Tim is thinking along those lines. Suffice to say, Clojure's macros are always going to be the best, but I have pretty high hopes that you can get 95% of the way with sweet.js. :)

[disnet]

Yes indeed. Sweet.js already uses syntax objects internally so the groundwork is there for syntax-case. We "just" need to implement and surface the API :)