Can I make a struct member point to a function?

[Zalinian]

As the title says, I want to have a member of a struct point to function.

EX:

function myFunc takes nothing returns nothing // <-- I also need it to take/return arguments if possible.
 // do stuff
endfunction

struct myStruct
    // members
    // more members
    Func // struct variable that points to a function
endstruct

Then somehow set myStruct.Func = myFunc, so I can call myStruct.Func() over myFunc().

Basically I need to attach certain functions to my heros (as unit-types). I already have the system for attaching structs of data to unit-types, and I can add triggers into the struct attached to the unit-types, but I can't find a way to attach a simple function.

 

[Nestharus]

Only way to do that is through triggers.

 

[Zalinian]

I need to pass arguments to it.
EX:

function myFunc takes integer i returns nothing
 // do stuff
endfunction

set myStruct.Func = myFunc
call myStruct.Func('some integer')

 

[Troll-Brain]

Read the jasshelper documentation and use a function interface.

 

[Zalinian]

Can a struct have multiple extensions?

 

[Romek]

> My data struct already extends an array, can I have multiple extensions?
That's got nothing to do with function interfaces..

Click me.

 

[quraji]

My data struct already extends an array, can I have multiple extensions?
I'm still a bit confused at how I use a struct member to point to a function.

1. Structs can only extend one thing at a time.

2. You're not understanding what to do if you're trying to make your struct extend anything

Here we go. Say this is the function you want to have:

function MyFunc takes string s returns nothing
     // do stuff
endfunction

The interface for this function would be like this:

function interface MyFuncInterface takes string s returns nothing

Now, you can treat MyFuncInterface somewhat like a custom type:

function MyFunc takes string s returns nothing
    // do stuff
endfunction

function interface MyFuncInterface takes string s returns nothing

// use it in a function:
function AnotherFunc takes nothing returns nothing
    local MyFuncInterface m = MyFunc
    call MyFunc.evaluate("a string")
endfunction

// or a struct:
struct Mystruct
    private MyFuncInterface M
    
    method SetFunc takes MyFuncInterface M returns nothing
        set this.M = M
    endmethod
    
    method EvalFunc takes nothing returns nothing
        call this.M.evaluate("a string")
    endmethod
endstruct

Hope that clears things up.

 

[Zalinian]

I read the 'interface' part, didn't notice the 'function interface' part till after.

Edit:Ok I changed some coding and such and I got it all to work, thanks for the help everyone.

 

[Nestharus]

For the record, interfaces and function interfaces equal triggers ;p

 

[Troll-Brain]

For the record, interfaces and function interfaces equal triggers ;p

Yes ofc, but the use is neater.
It's like use Table instead of directly an hashtable for an unlimited array.
The jass2 code is about the same but the vJass code is neater.

 

[Jesus4Lyf]

I think there are efficiency hits involved.
I also think I don't really care.
Just don't use fancy stuff in short periodic callbacks, lol.

 

[Romek]

> Just don't use fancy stuff in short periodic callbacks, lol.
Unless your computer is older than your mom, you won't notice even then.

If there's a simple way of doing something more efficiently, then go ahead and do it. There's no need to avoid doing things because they're 'slow' or anything though.

 

[Jesus4Lyf]

>There's no need to avoid doing things because they're 'slow' or anything though.
Projectile system authors are waiting outside your house to throw rocks at your head. :thup:

 

[Nestharus]

>There's no need to avoid doing things because they're 'slow' or anything though.
Projectile system authors are waiting outside your house to throw rocks at your head. :thup:

lol