Is there way to inherit interface with another interface on C++/cli?

Asked Aug 28 '17 at 20:55

Active Aug 28 '17 at 21:34

Viewed 122 times

I would like to implement following interfaces so whatever that inherits from iB would be able to use both methodA() and methodB() and whatever that inherits only iA would not have access to methodB() on C++. Seems like very standard interface inheriting another interface.

However, I get an error building stating that "a standard class cannot derive from a managed class"

__interface iA
{
    methodA();
}

__interface iB : iA
{
    methodB();
}

Does anybody have any clue on how I can resolve this issue?

EDIT : I am using managed C++. However, why would iB become standard and iA become managed?

edited Aug 28 '17 at 21:34

asked Aug 28 '17 at 20:55

Shintaro Takechi

1,215
1
17
39

Yes you can. Give it a shot. – Raindrop7 Aug 28 '17 at 20:56
1

"managed" is a term from Microsoft's .NET framework. You're not building this as plain C++. – Marcus Müller Aug 28 '17 at 20:56
`__interface` does not exist in standard C++ – Richard Critten Aug 28 '17 at 20:59
https://stackoverflow.com/questions/114238/difference-between-managed-c-and-c – Mooing Duck Aug 28 '17 at 20:59
That is correct that I am using managed C++. However, why would iB become standard and iA become managed? – Shintaro Takechi Aug 28 '17 at 21:03
Is this _all_ you have? Do you have any classes that try to implement either of these interfaces? – D Stanley Aug 28 '17 at 21:44
I have a dialog class that inherits CDialog and iB – Shintaro Takechi Aug 28 '17 at 21:47
Are you certain _that's_ not the problem? A non-managed class implementing a managed interface? – D Stanley Aug 28 '17 at 21:52
I have been implementing class that inherits iA as is without any issue. The error is only when I inherit iA from iB. If I detach iA and iB and inherit the interface separately to the class of my interest, there are no issue. – Shintaro Takechi Aug 28 '17 at 21:55
1

What version of Visual C++ is this? You should be using `interface class` in C++/CLI. "Managed C++" is dead and buried 12 years ago. – Ben Voigt Aug 29 '17 at 02:01
You can use under c++-cli `public interface class IA { ... };` and `public interface class IB : IA { ... };` – minus one Aug 30 '17 at 11:14

Is there way to inherit __interface with another __interface on C++/cli?

0 Answers0

Is there way to inherit interface with another interface on C++/cli?