Questions about struct array member

[Flux]

Hello fellow modders/coders, I have a few question regarding struct array members because I don't have JNGP at the moment so I can't test it myself
1. If the struct extends an array, can I still assign array members?
If that is the case, does allocation work differently?
2. Example my struct has an integer array member Q[5]. What are the index after JassHelper compiles?
this.Q[1] -> Si_Struct_Q[this*5 + 1]??
this.Q[4] -> Si_Struct_Q[this*5 + 4]??

 

[Gismo359]

1. Array structs can only have static array members.
2. s___MyStruct_Q[s__MyStruct_Q[this]+4] on both Vexorians and Cohadars (basically what you said)

 

[Flux]

1. Array structs can only have static array members.
2. s___MyStruct_Q[s__MyStruct_Q[this]+4] on both Vexorians and Cohadars (basically what you said)

1. Meaning?
2. Hmm, what I said (wrote) and what you wrote are different. Mine has multiplication to support 2d arrays. If no multiplication is involved, then each instance is a multiple? example, 5, 10, 15, etc. so it will not conflict with other instances??

EDIT': If you notice, my questions are kinda related. So If answer to 1. is allocation work the same, it is safe to assume that my hypothesis in 2. is correct.

 

[Gismo359]

1. Structs that extend array can only have static array members

struct MyStruxt extends array
    integer array Q[5] // JassHelper complains
    static integer array Q1 // Fine
endstruct

You also have to implement the allocation by yourself.
2. Oh, yeah you're right. I should also note that in the generated constructor JassHelper adds set s__MyStruct_Q[this]=(this-1)*5, where 5 is the array size.
The size (if any) also determines how much instances of the struct can exist at the same time.
Edit: Size, as in, the biggest size of all of its array members.
Edit2: In case the 2nd question was about structs that extend array, you cannot do this.someArray[5] (because you cannot declare such member in the first place).

 

[Flux]

^Ok I understand, thanks Gismo359, receive some rep.

last question, what's the difference?
integer array Q[5]
static integer array Q1

By static, what does it mean? It is not associated with the instance?

 

[Gismo359]

Yes. You dont have one of that member per every instance but a single one for the whole struct, thats why you refference it with the struct or thistype instead of the instance or this

A static array doesnt require you to set its size.

 

[Zwiebelchen]

If you want arrays in your structs, use the default allocation and don't bother with extends array.

There is a reason why the default implementation of structs exists. And the reason is just that: better usability. extends array will break a lot of stuff (like correct struct inheritance) for little to no real gain (other than a minor speed difference).

 

[Flux]

If you want arrays in your structs, use the default allocation and don't bother with extends array.

There is a reason why the default implementation of structs exists. And the reason is just that: better usability. extends array will break a lot of stuff (like correct struct inheritance) for little to no real gain (other than a minor speed difference).

Yeah you're right.