ERROR TS2391: Function implementation is missing or not immediately following the declaration.

[LiaoPeng]

The code:

import "allocator/arena";

interface Car{
	getBrand():string;
}

export class Audi implements Car{
	getBrand():string{
		return "audi";
	}
}
let audi = new Audi();

When I compile using asc, it throw exception:

ERROR TS2391: Function implementation is missing or not immediately following the declaration.

 	getBrand():string;
             ~~~~~~
 in test_impl.ts(5,12)

ERROR: Parse error
    at Object.main (/Users/Peng/GitHub/assemblyscript/cli/asc.js:377:23)
    at Object.<anonymous> (/Users/Peng/GitHub/assemblyscript/bin/asc:3:60)
    at Module._compile (internal/modules/cjs/loader.js:678:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:689:10)
    at Module.load (internal/modules/cjs/loader.js:589:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:528:12)
    at Function.Module._load (internal/modules/cjs/loader.js:520:3)
    at Function.Module.runMain (internal/modules/cjs/loader.js:719:10)
    at startup (internal/bootstrap/node.js:228:19)
    at bootstrapNodeJSCore (internal/bootstrap/node.js:575:3)

If I change the getBrand():string; to getBrand():string{};, it compiles fine.
It looks FunctionPrototype not finished.

/** A yet unresolved function prototype. */
export class FunctionPrototype extends Element {

I want to contribute some code, what shall I do?

[dcodeIO]

Interfaces are not yet supported and apparently don't initialize properly.

[LiaoPeng]

@dcodeIO Thanks for your replay.Are the interfaces supported on the way?

[dcodeIO]

There are no plans to support interfaces just now because implementing these properly requires support for virtual methods (virtual lookup tables etc. etc.), and the plan currently is to wait for the GC spec to land instead of rolling our own, possibly large, runtime. GC is tracked here: #89

[dcodeIO]

From a quick test it seems that the specific error has been fixed meanwhile, resulting in a "Not implemented" warning on "implements Car". Still not working, ofc, but the warning is intended and not a bug anymore. Hence closing, but feel free to reopen if there's still something exploding :)