Question by mouseman919 · Sep 19, 2011 at 12:30 PM · javascript class enum constructor

Construct class with enum parameter (javascript)

I declare my enum and my class constructor to take an int and an enum as parameters. Then i try to construct the class and I get the message:

The type 'ItemStackStruct' does not have a visible constructor that matches the argument list '(int, ItemType)'.

It works fine when I change the constructor to just take an int! What's wrong with this code?

 enum ItemType
 {
     DIRT,
     SEED,
     MAX_ITEMTYPES
 };
 
 class ItemStackStruct extends System.ValueType
 {
     //fields
     var type : ItemType;
     var amount : int;
     
     //Constructor 
     public function ItemStackStruct(amount:int, type:ItemType )
     {
         this.type = type;
         this.amount = amount;
     }
 }

.. Later:

 inventory = new ItemStackStruct[8];
 inventory[0] = new ItemStackStruct(32, ItemType.DIRT);

EDIT: Also, I should mention that the creation of the class is done in a different script. It's not something stupid to do with compile order or something?

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syclamoth · Sep 19, 2011 at 12:52 PM 0

If it were C#, I could help you here- I can't see any problems with it, but I can only assume that it is something to do with the exact syntax. I can't see a problem with this code! Maybe you need to remove the 'function' from between the public and the ItemStackStruct? In C# that would be how one would define a constructor, but I don't know JS well enough to be sure.

mouseman919 · Sep 19, 2011 at 02:10 PM 0

Ok for whatever reason, using "public" in front of the constructor causes this weird error, removing it seems to have fixed it for now.

I would be grateful if any javascript experts could explain whether using "public" in front of a constructor is good or bad practice and what it actually does, since many examples in the forums use that syntax.

save · Sep 19, 2011 at 10:00 PM 0

I'm not sure why it causes problems because functions are public by default in UnityScript (where they're private by default in C#).

You might get some hints if you use #pragma strict on the top of your document, try it out if you aren't already doing it.

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Construct class with enum parameter (javascript)

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