Allow arrays to pass through ports

[mgold]

The groundwork seems to have been laid in #585, but it doesn't appear to be allowed yet. Also update the error message in ExtraChecks.hs.

[mgold]

If you point me in the right direction I can try to implement this myself.

[evancz]

This is how it was done for Json.Value. Check out those locations and find how it's done for _List and that should be pretty close.

Looking back on that code, it'd be cool if we could make it so Native.Json and Native.Array get loaded conditionally rather than every time.

[mgold]

Okay, thanks.

@xashili Why did you take out the toJSArray and fromJSArray functions? Without them I have to convert to a list first.

[mgold]

Here is what I've figured out. If we put back the toJSArray and fromJSArray functions, then I can just copy the code generation from _List. I tried to figure out how to convert Array->List->JSArray and it looked like a rabbit hole.

[xash]

I opened a pull request with the functions, #603.

[evancz]

#603 is merged. My plan is to have this come with 0.13. I don't want to sit on 0.12.1 any longer!

[mgold]

If you like, but I think I've almost got it.

[evancz]

As long as I can publish tomorrow with confidence :)

[mgold]

Well... that's your call to make. I've tested incoming and outgoing and it seems to work, but I haven't run it through a proper test battery. The port code I just pushed is actually fairly simple. @xashili how much testing did you do for to/from JSArray?

[mgold]

Answer: enough.

Unless something jumps out at you I think we're good to merge.

[evancz]

Send the PR!

[mgold]

Oh, you can't merge from issues? Okay.