How to: Declare Override Specifiers in Native Compilations (C++/CLI)

 

The new home for Visual Studio documentation is Visual Studio 2017 Documentation on docs.microsoft.com.

The latest version of this topic can be found at How to: Declare Override Specifiers (C++/CLI).

sealed](../Topic/sealed%20%20(C++%20Component%20Extensions).md), abstract, and override are available in compilations that do not use /ZW or /clr.

Note

The ISO C++11 Standard language has the override identifier and the final identifier, and both are supported in Visual Studio Use final instead of sealed in code that is meant to be compiled as native-only.

Example

Description

The following example shows that sealed is valid in native compilations.

Code

  
      // sealed_native_keyword.cpp  
#include <stdio.h>  
__interface I1 {  
   virtual void f();  
   virtual void g();  
};  
  
class X : public I1 {  
public:  
   virtual void g() sealed {}  
};  
  
class Y : public X {  
public:  
  
   // the following override generates a compiler error  
   virtual void g() {}   // C3248 X::g is sealed!  
};  

Example

Description

The next example shows that override is valid in native compilations.

Code

// override_native_keyword.cpp  
#include <stdio.h>  
__interface I1 {  
   virtual void f();  
};  
  
class X : public I1 {  
public:  
   virtual void f() override {}   // OK  
   virtual void g() override {}   // C3668 I1::g does not exist  
};  

Example

Description

This example shows that abstract is valid in native compilations.

Code

// abstract_native_keyword.cpp  
class X abstract {};  
  
int main() {  
   X * MyX = new X;   // C3622 cannot instantiate abstract class  
}  

See Also

Override Specifiers