Compiler Error C3075

 

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 Compiler Error C3075.

instance' : you cannot embed an instance of a reference type, 'type', in a value-type

A value type cannot contain an instance of a reference type.

For more information, see C++ Stack Semantics for Reference Types.

The following sample generates C3075.

// C3075.cpp  
// compile with: /clr /c  
ref struct U {};  
value struct X {  
   U y;   // C3075  
};  
  
ref struct Y {  
   U y;   // OK  
};  

Show: