Compiler Warning (level 1) C4678
Visual Studio 2015
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 Warning (level 1) C4678.
base class 'base_type' is less accessible than 'derived_type'
A public type derives from a private type. If the public type is instantiated in a referenced assembly, members of the private base type will not be accessible.
C4678 is only reachable using /clr:oldSyntax. It is an error, using /clr, to have a base class that is less accessible that its derived class.
The following sample generates C4678:
// C4678.cpp
// compile with: /clr:oldSyntax /LD /W1
#using <mscorlib.dll>
private __gc struct privateG {
// try the following line instead
// public __gc struct privateG {
public:
int i;
};
public __gc struct V: public privateG { // C4678
public:
int j;
};
Show: