WASM: Support bind C for array passing to JavaScript

[Shaikh-Ubaid]

This PR adds support of using bind(c) in the wasm backend to import functions from JavaScript.

More details at https://gitlab.com/lfortran/lfortran/-/issues/761

[Shaikh-Ubaid]

This is ready.

I currently used bind(C) to support importing functions from JavaScript. It does not look very-hackish to me. Please possibly review and please share feedback.

[certik]

I think this looks good. Do you want to add some tests for this, say WAT tests using run_tests.py?

[Shaikh-Ubaid]

Do you want to add some tests for this, say WAT tests using run_tests.py?

Since the code for importing functions from JavaScript is only included/defined when compiling lfortran to wasm, it seems supporting WAT tests might not be possible with the current implementation.

[Shaikh-Ubaid]

Please, could you possibly share if we should start supporting bind(js)? I would wish to keep features as close to original fortran as possible. At the same time, it seems there is not a better option (at-least, at the moment).

[Shaikh-Ubaid]

I am merging this for the moment. I will work on supporting WAT tests in subsequent PR(s).

[certik]

I think the bind(c) might work well for this. I would only introduce bind(js) if we can't use bind(c).

[Shaikh-Ubaid]

I think the bind(c) might work well for this. I would only introduce bind(js) if we can't use bind(c).

Got it. Thank you.

Since the code for importing functions from JavaScript is only included/defined when compiling lfortran to wasm, please, could you possibly share how to add WAT tests for this?

[certik]

I would do it like this: https://gitlab.com/lfortran/lfortran/-/issues/771