[vJASS] Interface questions

[Ciebron]

Hi, i have a question about interfaces first time im working with them and i realised one thing.

look here

interface

interface Interfaces

real HP

endinterface

System

struct SomeSystem

Interfaces F

    static method create takes Interfaces F returns thistype
        local thistype this = thistype.allocate()

        set this.F = F
  
        return this
    endmethod
    

    static method callback takes nothing returns nothing
        //Stuff to get the correct Struct instance

        set this.F.HP = this.F.HP - 1 //What will happen if the Spell dont have the real HP?

        if this.F.HP <= 0 then //What will happen here?
        else
        endif
endstruct

Spell that uses system

struct SomeSpell extends Interfaces

SomeSystem SS

    static method create takes nothing returns thistype
        local thistype this = thistype.allocate()

        set this.SS = SomeSystem.create(this)
  
        return this
    endmethod

endstruct

So as you can see in the spell there is no real 'HP', what will happen when i try to mix with that in the system (Check the callback function)?

 

[YourNameHere]

You can use interfaces' members in child structs without having to worry about anything.

 

[Element of Water]

If the HP is unallocated it will just cause a thread crash like any other unallocated variable. It might not cause a thread crash if an interface with the same id has been used before.

 

[Deaod]

If the HP is unallocated it will just cause a thread crash like any other unallocated variable.

No, it wont. Its an array, remember?

 

[Element of Water]

I thought only integer arrays were automatically initialized to 0. Let me do a quick test...

EDIT: You're right. All arrays are initialized to 0/null.

 

[Ciebron]

Yeah discovered that aswell