vJass Struct questions

05-12-2009, 03:10 PM

Hi, I am new with vJass structs and I have some question regarding the .destroy() function if it is attached to a handle. So here is my code:

JASS:

struct MyStruct
    unit victim
endstruct

function Trig_Untitled_Trigger_004_Actions takes nothing returns nothing
    local MyStruct data = MyStruct.create()
    
    if(data.victim == null) then
        call BJDebugMsg("null")
    else
        call BJDebugMsg("OK")
    endif
    
    set data.victim = gg_unit_h000_0004
    
    if(data.victim == null) then
        call BJDebugMsg("null")
    else
        call BJDebugMsg("OK")
    endif
    
    call data.destroy()
    
    if(data.victim == null) then
        call BJDebugMsg("null")
    else
        call BJDebugMsg("OK")
    endif
endfunction

The function will return null, OK, OK when triggered. Does this mean that the struct members are not nullified after the struct was destroyed? If that is the case, wouldn't it cause memory leaks? And how do you nullify the struct members if it is necessary?

05-12-2009, 03:26 PM	#2
0zyx0	JASS: struct MyStruct unit victim method onDestroy takes nothing returns nothing set .victim = null endmethod endstruct This will make your function print "null", "OK", "null".

05-12-2009, 03:48 PM	#3
Fledermaus	You don't need to null structs members because they are just global arrays (once it's compiled). However, if you have something that checks if they are null, you may want to null them in the onDestroy method.

05-12-2009, 04:04 PM	#4
TheWye	so onDestroy method is some kind of special method that runs automatically when the struct instance is destroyed?

05-12-2009, 04:35 PM	#5
Alevice	yes

05-12-2009, 04:53 PM	#6
TheWye	Ok, thanks guys