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How to export classes from AssemblyScript?

I am trying to port my simple collision detection library from JavaScript to WebAssembly for speed. After looking up languages that compile to WASM, AssemblyScript seemed to be perfect as I only needed to add types to my JS file. The whole library is a Class and after adding types I tried to compile it but it does not compile properly. For example, compiling this using command npx asc path/to/main.ts -o wasm.wasm --exportRuntime -t wasm.wat --bindings esm:

export class Test {
    constructor() {
        console.log('Successful!');
    }
};

Resulted in this error:

WARNING AS235: Only variables, functions and enums become WebAssembly module exports.

 export class Test {
              ~~~~
 in main.ts(1,14)

After seeing the error I tried to fix it by doing:

class Test {
    constructor() {
        console.log('Successful!');
    }
};

export function getTest(): Test {
    return Test;
};

But that resulted in another error:

ERROR AS234: Expression does not compile to a value at runtime.

     return Test;
            ~~~~
 in main.ts(8,12)

FAILURE 1 compile error(s)

So I tried to do this:

class Test {
    constructor() {
        console.log('Successful!');
    }
};

export function getTest(): Test {
    return new Test();
};

That compiled successfully and after calling getTest from JavaScript I got an output Successful! in the console but it did not return the initiated class, instead I got this: [Number (Internref): 18624].

So I serched on the internet for solution and found this. But the accepted solution there is to use AssemblyScript Loader, which is deprecated. I also know about as-bind but it states that it wraps around AssemblyScript Loader so, indirectly, it is also deprecated. So how can I export classes from AssemblyScript?

about 4 years ago · Juan Pablo Isaza
1 Respostas
Responde à pergunta

0

So, there currently is no way to export classes. However, you can call methods on a class from JavaScript or call a get or set method to modify data. Idk if I can answer further, but I would recommend checking in with dcode at the AssemblyScript Discord.

about 4 years ago · Juan Pablo Isaza Relatório
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