TList Local scope

BlitzMax Forums/BlitzMax Programming/TList Local scope

tin	(Posted 2008) [#1]

ok, here my question,
Missile is created in FireMissile method in SpaceShip TYPE (Local Missile:). after that method FireMissile is finished, isn't that Missile object is deleted? because it's declare Local? and why it's left in GameObjectList:Tlist in global?

Global GameObjectList:TList

Type TMissile Extends TGameObject
    Function Create:TMissile()
        Local Ship::TMissile=New :TMissile
        ListAddLast GameObjectList, Ship       
        Return Ship
    End Function
End Type

Type SpaceShip
   Method FireMissile()
         If MissileDelay<0
     ----->>>>> Local Missile:TMissile=TMissile.Create()
            MissileDelay=10
         End If
    End Method    
End Type

Dreamora

(Posted 2008) [#2]

no it will never be destroyed. Its put into the list, so unless you remove it from the list again it will not die.

Brucey

(Posted 2008) [#3]

and why it's left in GameObjectList:Tlist in global

Because you now have a reference to the Object in the TList. As long as there's a reference to it, it will never be Garbage Collected.

Like what Dream said as I was typing this... :-p

N	(Posted 2008) [#4]

Because you put it in the linked list. Until you remove it from the linked list, it will never be freed.

I just wanted to be cool.

tin	(Posted 2008) [#5]

thanks.
got it.

Schragnasher

(Posted 2008) [#6]

to be a bit more explanatory, your only ever dealing with references to objects. so long as there is a reference, the object will still exist. you cannot destroy anything without destroying its references. Its actually quite useful that way.