Dictionary with user defined values

[ngambek2003]

How do I add values to a dictionary?

I have slice classes defined as follows

class A
{
int a;
};

class B extends A
{
int b;
};

dictionary<int, A> ASeq;

Now in my c++ code I have the following function

void AddToMap(const APtr &pA)
{
m_mapA[pA->a] = pA
}

I get a compilation error about a private destructor.

Thanks

[bernard]

Hi Budyanto,

I just tried to reproduce this compilation error, unfortunately without success. I updated the minimal C++ demo with:

class A
{
   int x;
};

class B extends A
{ 
   int y;
};

dictionary<int, A> AMap;

in Hello.ice

and

class Test
{
public:

   void AddToMap(const APtr& pA)
   {
	   _map[pA->x] = pA;
   }

private:
	AMap _map;
};

in Client.cpp

and as expected, it compiled fine (with Visual Studio 2010).

Can you provide a complete test-case?

Thanks,
Bernard

[ngambek2003]

Hi Bernard,

Thanks...I just tried it again and it does compile fine now.

Initiallly I did not pass in APtr into the function. It might have failed then. I was passing in A.

I thought I tried compiling after changing it to APtr.

Oh well. Thanks anyway.

[ngambek2003]

So actually in the C++ mapping AMap is really map<int, APtr> and not map<int, A>.

If I use the streaming api to stream the map into bytes that should work right?
It would know that A in the map is really APtr.

Thanks.

[marc]

Yes, Ice always uses smart pointers for class instances. The streaming API will stream the contents of the class instance, regardless of the language mapping. Have a look at the writeObject method as described here.