Inheritance in JASS

[tooltiperror]

Or use [LJASS]code[/LJASS] ?

 

[Dirac]

sadly you can't call [ljass]code[/ljass] or add arguments to it.

 

[Sgqvur]

Ayanami:
1. So essentially, Inheritance and Interfaces in JASS pretty bad? I mean, it's very limited.

1. What do you mean with "very limited"; what do you want to do but you are unable due to jasshelper's inheritance and interfaces limitations?

 

[Bribe]

You can easily call "code".

call ForForce(bj_FORCE_PLAYER[0], code)

 

[Dirac]

That's slower than a trigger evaluation and you can't still add arguments to it.
Plus code can't be an array

 

[Bribe]

If you create your own force (so it's not an array) it's faster than a trigger evaluation. You also can't evaluate boolexprs in their raw state, unlike code.

Sure there are pros and cons to each but I bet no one would be using boolexpr's if "code array" would work properly.

 

[Ayanami]

Ayanami:
1. So essentially, Inheritance and Interfaces in JASS pretty bad? I mean, it's very limited.

1. What do you mean with "very limited"; what do you want to do but you are unable due to jasshelper's inheritance and interfaces limitations?

For example, you can't really do Generic Programming. My idea was to treat multiple struct as a single object. But it seems in JASS, it's not really wise to do that. I meant limited in this sense.

 

[Sgqvur]

Ayanami:
1. For example, you can't really do Generic Programming.
2. My idea was to treat multiple struct as a single object.

1. Generic Programming as in Generic Programming? I don't think generic programming has to do anything with inheritance. It seams to me it's just a compiler "hack" that save you a lot of typing =). So you need a generic max function then your write it once and don't bother with imax, rmax, BigIntmax, etc... Or you need a vector of ints then you do vector<int> or vector of "whatevers" (vector<whatever>) (for C++). Well it seams to me that textmacro can do that pretty easily for vJass: //! runtextmacro max("rmax", "real") and you really don't need vector for vJass cause arrays are really huge (JASS_MAX_ARRAY_SIZE ~= 8K).
Some one might find the "need" for a generic list type but you are probably just better to wrap the type in a struct and implement a list module.
I guess modules are the "remedy" for almost every oop concept there is. It (the problem you want to "solve") can probably always be solved "best" (in terms of efficiency and easy of use/writing) with modules in my opinion. So I guess it always boils down to modules/structs for vJass =).

2. Can you elaborate more on that point? I don't get it. Are you writing about polymorphism?

 

[Ayanami]

Ayanami:
1. For example, you can't really do Generic Programming.
2. My idea was to treat multiple struct as a single object.

1. Generic Programming as in Generic Programming? I don't think generic programming has to do anything with inheritance. It seams to me it's just a compiler "hack" that save you a lot of typing =). So you need a generic max function then your write it once and don't bother with imax, rmax, BigIntmax, etc... Or you need a vector of ints then you do vector<int> or vector of "whatevers" (vector<whatever>) (for C++). Well it seams to me that textmacro can do that pretty easily for vJass: //! runtextmacro max("rmax", "real") and you really don't need vector for vJass cause arrays are really huge (JASS_MAX_ARRAY_SIZE ~= 8K).
Some one might find the "need" for a generic list type but you are probably just better to wrap the type in a struct and implement a list module.
I guess modules are the "remedy" for almost every oop concept there is.

2. Can you elaborate more on that point? I don't get it.

Well, my idea was to treat multiple struct to one type. For example in Java, every Class extends the class "Object" by default. Thus, every Class can be treated as an Object. I was trying to achieve that by extending each child struct to a single parent struct. Thus, I had to understand how inheritance actually works in JASS to achieve this. But knowing the instance limits, I don't think this is very practical.

 

[tooltiperror]

Well, seeing as every type is only an integer, why can't you do that? You just have to do some working around your initial idea. You can even do something like a module called Object that packages stuff together. Besides, that type of Abstraction isn't usually needed for JASS.

 

[Sgqvur]

Ayanami:
1. But knowing the instance limits, I don't think this is very practical.

2. For example in Java, every Class extends the class "Object" by default.

1. I don't think that extending reduces instance limits (C extends B extends A, you can still have 8190 C's) right?

2. You can make your structs/classes extend JObject instead =). OT: I wonder why some libraries prefix their types with a single capital letter (JLabel? QString?!?! any ideas?).

I think it's a good thing that vJass has many options/features and users can do what they please, it probably doesn't always turn out to be "the best" but hey Tim Toady right =)?

 

[Ayanami]

Well, seeing as every type is only an integer, why can't you do that? You just have to do some working around your initial idea. You can even do something like a module called Object that packages stuff together. Besides, that type of Abstraction isn't usually needed for JASS.

Hmm, well I was planning on doing something that requires Abstraction. Could you elaborate on the module part?

Ayanami:
1. But knowing the instance limits, I don't think this is very practical.

2. For example in Java, every Class extends the class "Object" by default.

1. I don't think that extending reduces instance limits (C extends B extends A, you can still have 8190 C's) right?

2. You can make your structs/classes extend JObject instead =). OT: I wonder why some libraries prefix their types with a single capital letter (JLabel? QString?!?! any ideas?).

I think it's a good thing that vJass has many options/features and users can do what they please, it probably doesn't always turn out to be "the best" but hey Tim Toady right =)?

I read somewhere that it reduces your individual instances. C extends B extends A would have 8190 instances in total. That's what I heard.

Actually, I could use an Interface, right?

interface Object
endinterface

struct A extends Object
endstruct

struct B extends Object
endstruct
[/ljass]

 

[Dirac]

I'm no expert on Java but it really frustrates me that i can't create my own custom allocation methods. (You can't assign integer values to objects)

 

[Sgqvur]

Sure you can:

interface Object
endinterface

struct A extends Object
endstruct

struct B extends Object
endstruct

Although you can't do:

interface I1
endinterface

interface I2
endinterface

struct S extends I1, I2
endstruct

Why would you need this for Jass scripting? I don't know...


Dirac:
1. I'm no expert on Java but it really frustrates me that i can't create my own custom allocation methods. (You can't assign integer values to objects)

1. =). You are writing about java right? How does assigning an integer to an object equates to a custom allocation method? Java is strict about it's allocation schemes with the new TypeName/Constructor thing and sometimes ClassWithStaticAllocationThingy.new() =).