forward declarations and generic containers

[omellet]

I'm trying to define a class, A, that has a List<> of interface
instances, IA. IA has a property pointing back to a class A instance,
so I need to forward define IA in order to use it in A.

#include "stdafx.h"

using namespace System;
using namespace System::Collections::Generic;

interface class IA;

ref class A {
public:
List<IA^> coll_;
};

interface class IA {
public:
property IA^ myIA { IA^ get(); }
};

int main(array<System::String ^> ^args)
{
A^ a = gcnew A();
a->coll_ = gcnew List<IA^>();
return 0;
}

compiler output:

fwdTests.cpp
fwdTests.cpp(24) : error C2582: 'operator =' function is unavailable in
'System::Collections::Generic::List<T>'
with
[
T=IA ^
]

Is this a bug, or am I not supposed to be able to do this?

[Nishant Sivakumar]

List<IA^> coll_;

Try changing that to

List<IA^>^ coll_;

--
Regards,
Nish [VC++ MVP]
<om*****@gmail.com> wrote in message
news:11**********************@f14g2000cwb.googlegr oups.com...

I'm trying to define a class, A, that has a List<> of interface
instances, IA. IA has a property pointing back to a class A instance,
so I need to forward define IA in order to use it in A.

#include "stdafx.h"

using namespace System;
using namespace System::Collections::Generic;

interface class IA;

ref class A {
public:
List<IA^> coll_;
};

interface class IA {
public:
property IA^ myIA { IA^ get(); }
};

int main(array<System::String ^> ^args)
{
A^ a = gcnew A();
a->coll_ = gcnew List<IA^>();
return 0;
}

compiler output:

fwdTests.cpp
fwdTests.cpp(24) : error C2582: 'operator =' function is unavailable in
'System::Collections::Generic::List<T>'
with
[
T=IA ^
]

Is this a bug, or am I not supposed to be able to do this?

[omellet]

Duh. Thanks!