Class name as function parameter, how does it work?

I have a function that takes a class as input parameter and then instantiates it.

It looks kind of like this:

class SomeClass {}

class OtherClass {
    function startHere() {
        doSomething( SomeClass );
    }
    function doSomething( myClass ) {
        var c = new myClass();
    }
}

This works fine, but I am wondering how it works exactly. What type is the parameter of doSomething()? In the language reference I could not find any type that represents a class.

Is there a way to at compile time restrict the class passed in to certain types (e.g. all classes extending a certain base class)? I know I could use instanceof at runtime, but would prefer compile time.

0 the-ninth 25 days ago

Just remembered this discussion ... in Toybox.Lang.Method I did find an instance where Garmin allows passing a class into a function. However it is an untyped parameter, so the type of passing in a "Classdef" remains a mistery.

initialize(aClass, aMethod as Lang.Symbol)

Method Constructor.

Parameters:

aClass —

Classdef of method (e.g. Toybox.SensorHistory) or a class instance.
aMethod — (Lang.Symbol) —

Symbol of class method

Since:

API Level 1.0.0

https://developer.garmin.com/connect-iq/api-docs/Toybox/Lang/Method.html

0 flocsy🤠 25 days ago in reply to the-ninth

But even here, there's no type like: aClass as ...

0 the-ninth 25 days ago in reply to flocsy🤠

No, it is not. They call it a "Classdef" but that does not seem to be a thing.

0 flocsy🤠 25 days ago in reply to the-ninth

no it doesn't have a type:

    function test(aClass) as Boolean {
        return true;
    }
        test(1); // Number
        test(1f); // Float
        test("foo"); // String
        test(ExitMenu); // module
        test(ExitMenuDelegate); // class

interestingly strict type checker doesn't care, it accepts all the above. Maybe it's kind of a bug, I thought it would not like a function declaration without a type in the parameter

0 the-ninth 25 days ago in reply to flocsy🤠

flocsy🤠 said:
no it doesn't have a type:

Excuse my English, I meant to agree with you that it does not have a type.