Compiler Error C3141

 

For the latest documentation on Visual Studio 2017 RC, see Visual Studio 2017 RC Documentation.

'interface_name' : interfaces only support public inheritance

Interfaces defined with the interface (or __interface) keyword only support public inheritance.

The following sample generates C3141:

// C3141.cpp  
__interface IBase {};  
__interface IDerived1 : protected IBase {};  // C3141  
__interface IDerived2 : private IBase {};    // C3141  

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