Is there a way to use function as argument?

[Deleted member 219079]

How to make something like this work?

struct something
    function f
    method destroy takes nothing returns nothing
        call f()
        call this.deallocate()
    endmethod
endstruct

function asd takes function f returns nothing
    local some = something.create()
    set some.f = f
    call some.destroy()
endfunction

No my code doesn't look like that, made that to represent my problem.

So problem is, is there a way to call a set function on destroy of a struct?

 

[Ceday]

You can use string function's name and use executefunc.

 

[chobibo]

function Nyan takes code cfunc returns nothing
endfunction

Uhh.. I guess you could use a ForPlayer, ForGroup or the AI native (I forgot which one) call to execute the function lol.

 

[Deleted member 219079]

Ceday's method seems to work : )
Wc3 doesn't allow arraied codes somehow, so chobi's method doesn't work in my system..

 

[edo494]

you can put functions into boolexprs(And, Or, Condition, Filter, Not) and while you have to couple it with null, which may slow down the performance by a call to null function, you can put those to array.

Dont forget to clear them with DestroyBoolExpr before clearing the array

remember that the function must by all means return boolean if you are storing them in boolexprs

 

[WaterKnight]

The type for a function pointer is code but you cannot have code arrays in jass. So saving it as a struct instance member won't work. Nor can you input in hashtable.

You can convert it to a trigger like CreateTrigger(), TriggerAddCondition(Condition(f)), save the trigger and then run it. Or as boolexpr, or as string for ExecuteFunc as already said, though there is no function to directly convert it. To truly dynamically obtain code, you would have to make functions like

function someFunc_setCode takes nothing returns nothing
    set GLOBAL_CODE_VAR = function someFunc
endfunction

for each regular function, then put those special functions into containers as suggested above, assign them, run them on demand and see the resulting value of GLOBAL_CODE_VAR.

Or you make mass if-branching:

function getCode takes integer id returns code
    if (id == UNIQUE_ID_FOR_funcA) then
        return funcA
    endif
    if (id == UNIQUE_ID_FOR_funcB) then
        return funcB
    endif
    if (id == UNIQUE_ID_FOR_funcC) then
        return funcC
    endif
    ...

or whatever you want to represent it with. Of course such tasks should be realized by compilers. You do not really require pure code though.

@edo494: The functions do not need to return a value unless you mean that pjass nags. I do not recommend to destroy single-function boolexprs (returned by Condition or Filter) because they are recycled and you can index a function by

function GetCodeId takes code c returns integer
    return GetHandleId(Condition(c))
endfunction

if you keep them.