Function with args

[raphaelfff]

Is there any plan/ETA to support function calls with args/return values ?

[jeffcharles]

Do you mean in the context of exported functions? For those, there is no current plan. We're open to contributions! Though we'd prefer a discussion of an implementation plan before receiving a PR to save time if there is a fundamental issue with the approach.

[SHND]

I think this can be extremely useful! Having able to export functions that can accept inputs and return an output + import functions to webassembly means we can create wasm files that potentially can be run anywhere even non-javascript environments!

[andreaTP]

I'm experimenting with a variation of this in QuickJs4J (which is based on Javy):

roastedroot/quickjs4j#33

Prerequisites:

• we are generating dynamic bindings host/guest so that the guest(JS) can easily invoke anything on the host(Java for us)
• we are already enabling function returns: is a special case of host invocation with a single value that is the result

Design:

• we compile the user JS library and we control the input stream
• we generate the dynamic JS code that will invoke the function and return the result to the host
• the input stream contains JSON defining:
  • the function to be invoked
  • the arguments to be passed

Goals:
Have JS code written in a library that can be compiled once and re-used for dynamic function invocation of multiple "entrypoints".

I doubt I'd have the time to try to port this approach in this codebase, but sharing as it might be a starting point for someone else(the design is completely ).

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@jeffcharles 🙏 thanks again for the chat we had at WASM/IO, you can see that I'm making effective use of your suggestions 🙂 and enjoying the journey!