SES on JVM: struggling with __proto__ cycle for Function

I’ve got an application where most of the deployment platform is the JVM and I’d like to re-write it in SES. I mentioned this to @erights and he said figuring out how to do SES on the JVM would be useful; for example, for interoperability with RChain.

Legend has it Nashorn on Java 9 has pretty good javascript support. At first it walk balking at const but i learned:

To activate ES6 support, use --language=es6 on the command line. – Laskey

That got me a little further; in particular, I’m using openjdk 10 via docker:

# start in the shim/examples directory of the proposal-realms repo

docker run -v $(cd ..; /bin/pwd):/opt -w /opt --rm -it openjdk:10 \
       jjs --language=es6 dist/realm-shim.js examples/simple.js

But no joy:

Exception in thread "main" java.lang.RuntimeException: dist/realm-shim.js:95:10 ES6 destructuring is not yet implemented
    const { contextFunction } = contextRec;

context: 3ccc45a646d https://github.com/tc39/proposal-realms

p.s. is there a better repo in which to raise this issue? It sorta belongs in proposal-realms, but I’m not sure this is tc39 business.

[erights]

Not clear. It is conformant to prevent proto cycles, but this code should not have tried to create one. So it depends on why it thought it had a proto cycle that needed to be rejected.

[dckc]

oh. right. spread. Modern JS is pretty nice 😃