type auto = i32;

@final export abstract class Function<T> {

private _index: u32;

private _env: usize;

// @ts-ignore: this on getter

get index(this: T): u32 {

return load<u32>(changetype<usize>(this), offsetof<Function<T>>("_index"));

}

// @ts-ignore: this on getter

get name(this: T): string {

return "";

}

// @ts-ignore: this on getter

get length(this: T): i32 {

// @ts-ignore: T is function

return lengthof<T>();

}

// @ts-ignore: T is function

@builtin call(thisArg: thisof<T> | null, ...args: auto[]): returnof<T> {

return unreachable();

}

toString(this: T): string {

return "function() { [native code] }";

}

// RT integration

@unsafe private __visit(cookie: u32): void {

// Env is either `null` (nop) or compiler-generated

__visit(this._env, cookie);

}

}