Can I do this (Struct destruction)?

[Zwiebelchen]

The title says everything: Does this work properly?

struct cat
	integer a
	unit b
	...

	method onDestroy takes nothing returns nothing
		call KillUnit(.b)
		set .b = null
	endmethod
endstruct

struct dog
	real c
	timer d
	...

	method onDestroy takes nothing returns nothing
		call DestroyTimer(.d)
		set .d = null
	endmethod
endstruct


function TestFunc takes nothing returns nothing
	local dog CatOrDog
	if GetRandomInt(1,2) == 1 then
		set CatOrDog = dog.create()
	else
		set CatOrDog = cat.create()
	endif
	call CatOrDog.destroy()
endfunction

In other words: Does the right onDestroy() method fire upon calling the .destroy() command? Can I disguise 'dog' with 'cat'? As far as I know, structs are only integers, so it should work, doesn't it? Which onDestroy() method fires when a 'cat' struct is destroyed by CatOrDog.destroy()?

 

[Laiev]

>> In other words: Does the right onDestroy() method fire upon calling the .destroy() command?
Yes

 

[Zwiebelchen]

>> In other words: Does the right onDestroy() method fire upon calling the .destroy() command?
Yes

No it doesn't. I tested it now. Only the matching destroy function fires. If I destroy a Catstruct which was declared as Dog type inside the function, nothing happens.

 

[Komaqtion]

Why not just do this:

 function TestFunc takes nothing returns nothing
	local dog CatOrDog
        local cat DogOrCat
	if GetRandomInt(1,2) == 1 then
            set CatOrDog = dog.create()
            call CatOrDog.destroy()
	else
	    set DogOrCat = cat.create()
            call DogOrCat.destroy()
	endif
endfunction

 

[Uberplayer]

Use interface.

 

[Zwiebelchen]

Why not just do this:

 function TestFunc takes nothing returns nothing
	local dog CatOrDog
        local cat DogOrCat
	if GetRandomInt(1,2) == 1 then
            set CatOrDog = dog.create()
            call CatOrDog.destroy()
	else
	    set DogOrCat = cat.create()
            call DogOrCat.destroy()
	endif
endfunction

You do realize that this was just an example with no practical sense, don't you?

Use interface.

Hmm, can you be more specific? I never used interfaces before.

 

[kingkingyyk3]

function TestFunc takes nothing returns nothing
	local dog CatOrDog
	if GetRandomInt(1,2) == 1 then
		set CatOrDog = dog.create()
                call CatOrDog.destroy()
	else
		set CatOrDog = cat.create()
                call cat(CatOrDog).destroy()//typecasting of struct.
	endif
endfunction

The type of struct is declared as dog. It will auto typecasted even you used it to store cat. However, you may use typecasting to make it back

 

[Jesus4Lyf]

interface catordog
endinterface
struct cat extends catordog
endstruct
struct dog extends catordog
endstruct

//...
local catordog CatOrDog=cat.create() //or dog.create(), and so on.

 

[Zwiebelchen]

Cool, thanks for your help Jesus.