| description | title | ms.date | f1_keywords | helpviewer_keywords | ||
|---|---|---|---|---|---|---|
Learn more about: Compiler Warning (level 4, off) C4435 |
Compiler Warning (level 4, off) C4435 |
1/22/2025 |
|
|
'derived_class': Object layout under
/vd2will change due to virtual base 'base_class'
This warning is off by default. For more information, see Compiler Warnings That Are Off by Default.
Under the default compile option of /vd1, the derived class doesn't have a vtordisp field for the indicated virtual base. If /vd2 or #pragma vtordisp(2) is in effect, a vtordisp field is present, changing the object layout. This difference can lead to binary compatibility problems if interacting modules are compiled with different vtordisp settings.
The following sample generates C4435.
// C4435.cpp
// compile with: /c /W4
#pragma warning(default : 4435)
class A
{
public:
virtual ~A() {}
};
class B : public virtual A // C4435
{};