Nesting Structs

12-17-2009, 05:18 AM	#1
thelifelessone	Why doesn't it work...? JASS: struct Parent struct Child endstruct endstruct Doesn't work.

12-17-2009, 11:09 AM	#2
Hans_Maulwurf	You can only nest scopes. What are you trying to do? I think what you want to do is extend structs. JASS: struct Parent endstruct struct Child extends Parent endstruct http://www.wc3c.net/vexorian/jasshel...l#extendstruct

12-17-2009, 11:46 AM	#3
Seshiro	No, he wants to nest, it's kind of a logical placement, just to show, that those to belong together. It's not possible, because its not necessary, all profits you get with that you can earn by using privaze keyword and an intelligent Namiingconvention ... Next time post in Triggers and Scripts or JH Thread :) Greez

12-17-2009, 06:48 PM	#4
thelifelessone	Bah. I need to be able to nest structs... I'm trying to be able to do more OOP style programming, doing something like this; call Parent.Child.Method. Is there any kind of work around for that?

12-17-2009, 10:45 PM	#5
Vexorian	The work around is not doing it. Composition is not part of vjass. I think that maybe if hell freezes , then melts and then freezes again I will make a good vJass compiler that allows nesting types and structs inside structs, but in jasshelper.exe it won't happen.

12-18-2009, 12:05 AM

TriggerHappy

It may not be exactly what you want.

JASS:

library test initializer onInit

    private struct ChildEx
        method echo takes nothing returns string
            return I2S(this)
        endmethod
    endstruct
    
    private struct Parent
        ChildEx Child
        static method create takes nothing returns Parent
            local Parent p = Parent.allocate()
            set p.Child  = Child.create()
            return p
        endmethod
    endstruct
    
    private function onInit takes nothing returns nothing
        call BJDebugMsg(Parent.create().Child.echo()) // Displays 1
        call BJDebugMsg(Parent.create().Child.echo()) // Displays 2
        call BJDebugMsg(Parent.create().Child.echo()) // Displays 3
    endfunction

endlibrary

12-18-2009, 02:42 AM

thelifelessone

Not quite...

What I want is this;

JASS:

//library...
    struct Parent
        struct Child
            static method Print takes nothing returns nothing
                call BJDebugMsg("Hai")
            endmethod
     endstruct

    function Init takes nothing returns nothing
        call Parent.Child.Print()
    endfunction
//endlibrary...

@Vexorian

I don't see what's wrong with it. It could really help with keeping code organized.
It doesn't really have to be nested classes. You could implement some kind of namespace style "container", which have the same effect (Parent.Child.Method)

12-18-2009, 02:51 AM	#8
Vexorian	it is not wrong. It is just something I can't really add to jasshelper.exe's poor compiler ways. So if I ever code an actually good compiler it will allow it.

12-18-2009, 03:08 AM

TriggerHappy

That still would be very simple.

JASS:

library test initializer onInit

    private struct ChildEx
        static method Print takes nothing returns string
            return "pwnt"
        endmethod
    endstruct
    
    private struct Parent
        static ChildEx Child
    endstruct
    
    private function onInit takes nothing returns nothing
        call BJDebugMsg(Parent.Child.Print()) // Displays pwnt
    endfunction

endlibrary

12-18-2009, 03:36 AM	#10
thelifelessone	@ Vexorian Ah. @ TriggerHappy Mind explaining exactly how that works?

12-18-2009, 04:23 AM	#11
TriggerHappy	The struct Parent just has a pointer (named Child) to the ChildEx struct.

12-18-2009, 07:39 AM	#12
thelifelessone	Alright, thanks. I'll try that tomorrow.

12-18-2009, 12:05 PM	#13
Seshiro	Or you could use Delegates and use another struct that you use as the child ...