Overloading of [] operator ?

[Gawel]

Is it possible ? I can't figure out how to do it.

 

[Ken Alverson]

Is it possible ? I can't figure out how to do it.

returntype operator[](paramtype p, paramtype2 p2) {
// ...
}

Ken

 

[Ken Alverson]

Is it possible ? I can't figure out how to do it.

returntype LHStype:perator[](indextype index) {
// ...
}

Ken

 

[Ken Alverson]

Is it possible ? I can't figure out how to do it.

returntype operator[](paramtype p, paramtype2 p2) {
// ...
}

Oops, subscript has to be a member. See my other message.

Ken

 

[Gawel]

returntype LHStype:perator[](indextype index) {

// ...
}

public __gc class Class1
{
public:
Class1(void) {}
~Class1(void){}

int operator[](int index)
{
return 2;
}
};

And I got : PointFProba.h(44): error C3258: managed operators must be
declared using 'static op_<Name>' form ('operator' form is disallowed).
That is my problem

Gawel

 

[Gawel]

// read-only, 1D

__property int get_List(int index){}

// write-only, 1D
__property void set_List(int index, int value){}

// read-only, 2D
__property int get_List(int index1, int index2){}

// write-only, 2D
__property void set_List(int index1, int index2, int value){}

It works. Thank you very much.

Gawel

 

[Gawel]

One more question. If I write :

__property int get_List(int index){}

I can use it in MC++:

int i = o->List[1];

but in C# I don't have indexer but get_List method instead and I have to
write:

int i = o.get_List(1);

Well, how to implement indexer in MC++ that will be visible in C# ?

Gawel

 

[Guest]

Indexers and properties in C# are a little different, you don't use functions. You can overload indexers by the type of index used. This difference will cause things work a bit different

So as in C++ we call the indexer by its function name

Obj->myIndexer[2] = 10

In C# there's no function to call, so no "->" or "." are used

Obj[2] = 10

To call a C# indexer from C++, the name basically defaults to "Item", which you might have noticed in some of the controls. I think, but don't quote me on it, you can change this default name by using the runtime attribut

[System.Runtime.CompilerServices.IndexerName("NewIndexerName")
public bool this [ int index



You might be able to add this to C++ indexers, I haven't tried it yet, but since we've been talking about it, its got my brain ticking, so I'll more than likely have a go after I wake up.