Objects and variables

ID:1864224
 
Jun 2 2015, 11:43 am
(See the best response by Mightymo.)
Problem description: Not so much a problem as to more of a question. You'll see in the code below. If you need me to expand on anything let me know. I'm not the greatest at explaining things.

Code:
obj
    var
        limit
        amount //do these variables get assigned to every object now in the game whether or not they are ever used?

    proc
        remove_amount(n as num)
            src.amount-=n
            //remove code

weapons //for example I don't want weapons to have amount
    parent_type = /obj/

    sword
        equipped

potions //but I do want amounts with potions?
    parent_type = /obj/

    health_potion
        limit = 5
        amount

food //or even food?
    parent_type = /obj/

    chicken
        limit = 5
        amount
Jun 2 2015, 12:02 pm
Best response
Yes, but this suggests that your hierarchy should be different.

obj
    Stackable
        var
            limit
            amount
        proc
            remove_amount(n as num)
                src.amount-=n
                //remove code

weapons
    parent_type = /obj/

    sword
        equipped

potions
    parent_type = /obj/Stackable

    health_potion
        limit = 5

food
    parent_type = /obj/Stackable

    chicken
        limit = 5


Or however it may be categorized.
Jun 2 2015, 12:23 pm
Ahhh I see, I never knew it could be done that way, Thanks.

Also for another example, is there a specific way to do this?

obj
    proc
        give_description()
            world<<"[src.description]" //how do i stop this being an undefined variable or is this impossible?

weapon
    parent_type = /obj/

    sword
        var
            description = "This is a sword"

        verb
            description()
                give_description()


Also as a note i realize this is a terrible example. I also know BYOND has desc inbuilt.
Jun 2 2015, 1:13 pm
I'm not confident that I know what you are asking. Are you attempting to use a more generic type for the process to display the more specific type's variable? That wouldn't even compile, and in this case only works because description is built in.

If you're just trying to keep description a filled string, just make sure to define it for all objects that would call give_description().
Jun 2 2015, 1:21 pm
No sorry I'll try to explain it a little better.

Say for example I have a variable under the weapon datum and a proc outside of that datum. Then i use the variable in that proc it's an undefined variable right? How do i stop that from being an undefined variable?

proc
    random_proc()
        world<< src.random_var //random_var is under the random datum but it's undefined.

random
    var
        random_var

    verb
        do_stuff()
            random_proc()


Jun 2 2015, 2:06 pm
You need to define a proc as part of the datum in order to access that object's variables.

random
    var
        random_var

    verb
        do_stuff()
            random_proc()
    proc
        random_proc()
            world<< src.random_var


If the proc is truly supposed to be global, then you need to pass the datum instead.

proc
    random_proc(var/random/r)
        world<< r.random_var 

random
    var
        random_var

    verb
        do_stuff()
            random_proc(src)
Jun 2 2015, 2:13 pm
In response to Mightymo
Mightymo wrote:
> proc
>     random_proc(var/random/r)
>         world<< r.random_var
>
> random
>     var
>         random_var
>
>     verb
>         do_stuff()
>             random_proc(src)
>


This is what I was always looking for thanks, I tried something very similar to this before but instead of var/random/r i just var/r. Thanks for the help.

Jun 2 2015, 2:28 pm
No problem.