Adding hash-prefix extensions

[Robby Zambito]

Hello,

I noticed that Kawa has support for hash-prefixed forms
(https://www.gnu.org/software/kawa/Hash-prefixed-forms.html). Is this
something that can be extended, similar to how Guile supports extending
the reader with `read-hash-extend`
(https://www.gnu.org/software/guile/manual/html_node/Reader-Extensions.html#Reader-Extensions)?


I tried digging around in the Kawa repository but I couldn't find where
these hash-prefixed forms are implemented at all. Can they only be
implemented on the Java side?

Thanks,
Robby