Type checking and casting using "is"

ID:2611454
 
Sep 4 2020, 12:35 pm
Redundant
Applies to:DM Language
Status: Redundant
This feature has already been implemented, or is already achievable with existing methods.
The addition of "is" type checking and casting would be a fairly simple and useful addition, something like:

/mob/verb/Check(obj/myObj)
    /*
    Equivalent to:
    
    if(istype(myObj, /obj/vehicle/car))
        var/obj/vehicle/car/myCar = myObj
        ...
    */
    if(myObj is /obj/vehicle/car/myCar)
        myCar.name = "[usr]'s car"
        usr << "You claimed the car"
    // Or
    if(myObj is var/obj/item/candy/myCandy)
        usr << "This is candy"

(I don't believe this has been suggested before, searching gives a bunch of false positives)
Sep 4 2020, 1:15 pm
Lummox JR resolved issue (Redundant)
Sep 4 2020, 1:15 pm
We have istype() for this.
Sep 4 2020, 1:48 pm
Yes I know, I reference it in the post. It's a helper. Similar to isobj().
Sep 4 2020, 1:54 pm
I don't see that the syntax change would really help anything.
Sep 4 2020, 1:57 pm
It is a cleaner method, similar to what C# has. It checks type, creates a variable, and casts it all in one line.

https://docs.microsoft.com/en-us/dotnet/csharp/ language-reference/keywords/is
Sep 4 2020, 6:01 pm
I actually got a bit spoiled on it when I was using C# too, but I can live without it in DM =P
Sep 5 2020, 6:20 am
I just thought it would be a cool simple addition, I can def live without it but would be nice syntactic sugar