Correct usage of "this" in assemblyscript

[johnhill396]

Question

I'm working on an AssemblyScript application. The way the code is structured requires passing an instance of a class in the constructor of another class. For example:

class Something {

  constructor(private context: MyContext) { }

  testMethod(): void {
    //Some logic which uses variables and methods from context class  
    let a: this.context.getSomething();
  }
}

class MyContext {
  
  //Is below a correct usage of 'this'?
  somethingObj: Something = new Something(this);

  myMethod(): void {
    //Some logic which uses somethingObj
    this.somethingObj.testMethod()
  }
  
}

I'm able to build and run the code successfully. But, is the above field somethingObj in MyContext class correctly using 'this' keyword? Could this somehow lead to some runtime errors around out of bounds memory access?

[CountBleck]

I'm pretty sure this is okay.

[HerrCai0907]

It is ok. But you should note that this is not initialized at this moment.

[johnhill396]

It is ok. But you should note that this is not initialized at this moment.

yeah, that's what I was worried about. Could that cause any issues at runtime? Any best practices around it?

[MaxGraey]

You can just use this as alterative:

class MyContext {
  somethingObj: Something!; // use exclamation mark

  constructor() {
    this.somethingObj = new Something(this)
  }

  myMethod(): void {
    this.somethingObj.testMethod()
  }
}