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Compiler Error C2683

  • Artikkeli

'cast' : 'type' is not a polymorphic type

You cannot use dynamic_cast to convert from a non-polymorphic class (a class with no virtual functions).

You can use static_cast to perform conversions of non-polymorphic types. However, static_cast does not perform a run-time check.

The following sample generates C2683:

// C2683.cpp
// compile with: /c
class B { };
class D : public B { };

void f(B* pb) {
   D* pd1 = dynamic_cast<D*>(pb);  // C2683
   D* pd1 = static_cast<D*>(pb);   // OK
}