new (new slot in vtable) (C++/CLI and C++/CX)

The new keyword indicates that a virtual member will get a new slot in the vtable.

All Runtimes

(There are no remarks for this language feature that apply to all runtimes.)

Windows Runtime

Not supported in Windows Runtime.

Common Language Runtime


In a /clr compilation, new indicates that a virtual member will get a new slot in the vtable; that the function does not override a base class method.

new causes the newslot modifier to be added to the IL for the function. For more information about newslot, see:


Compiler option: /clr


The following sample shows the effect of new.

// newslot.cpp
// compile with: /clr
ref class C {
   virtual void f() {
      System::Console::WriteLine("C::f() called");

   virtual void g() {
      System::Console::WriteLine("C::g() called");

ref class D : public C {
   virtual void f() new {
      System::Console::WriteLine("D::f() called");

   virtual void g() override {
      System::Console::WriteLine("D::g() called");

ref class E : public D {
   virtual void f() override {
      System::Console::WriteLine("E::f() called");

int main() {
   D^ d = gcnew D;
   C^ c = gcnew D;

   c->f();   // calls C::f
   d->f();   // calls D::f

   c->g();   // calls D::g
   d->g();   // calls D::g

   D ^ e = gcnew E;
   e->f();   // calls E::f
C::f() called

D::f() called

D::g() called

D::g() called

E::f() called

See also

Component Extensions for .NET and UWP
Override Specifiers