T32 Question

[Risen]

When you "implement T32x", it adds this function.

function s__structname_T32x__PeriodicLoop takes nothing returns boolean
        local integer this=s__structname_T32x__next[(0)]
        loop
            exitwhen this == 0
            call s__structname_ funcname(this)
            set this=s__structname_T32x__next[this]
        endloop
        return false
endfunction

My question: does "this" need to point to an array?

 

[tooltiperror]

It doesn't point to an array. Integers are not pointers in JASS.

It's taking the value of the data in the memory slot of [ljass]s__structname_T32x__next[(0)][/ljass].

Structs are arrays, after all.

 

[Risen]

Wouldn't replacing [ljass]s__structname_T32x__next[(0)] [/ljass] with [ljass]s__structname_T32x__next [/ljass] be more efficient?

Or is it even possible?

 

[PurgeandFire]

Wouldn't replacing [ljass]s__structname_T32x__next[(0)] [/ljass] with [ljass]s__structname_T32x__next [/ljass] be more efficient?

Or is it even possible?

I'm not sure what you mean. s__structname_T32x__next is an array, so it has to have the [0] index included.

 

[Sevion]

No, that would be impossible.

[ljass]s__structname_T32x__next[(0)][/ljass] points to a specific integer. [ljass]s__structname_T32x__next[this][/ljass] points to this instance's next struct.

I.E.

struct a
    thistype next
    thistype prev

    public static method create ... returns thistype
        local thistype this = thistype.allocate()

        // link the list
        set thistype(0).next.prev = this
        set this.next = thistype(0).next
        set thistype(0).next = this
        set this.prev = thistype(0)

        return this
    endmethod
endstruct

Would compile to something resembling this:

integer array s__a
integer array s__a__next
integer array s__a__prev

function s__a_create ... returns integer
    set s__a[s__a__allocate_count] = new struct // however JH does this
    
    // Watch this part (link the list)
    set s__a__prev[s__a__next[(0)]] = s__a[s__a__allocate_count]
    set s__a__next[s__a[s__a__allocate_count]] = s__a__next[(0)]
    set s__a__next[(0)] = s__a[s__a__allocate_count]
    set s__a__prev[(0)] = s__a[(0)]

    return s__a[s__a__allocate_count]
endfunction

Thus, you can see that each struct is just an integer array with the struct instance number being the array position.

Because of this, each struct "member" has to be an array. That means that having [ljass]s__structname_T32x__next[/ljass] would not work.

 

[Risen]

Ah nevermind, I missed another function where the array was actually being used. :/