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I tried searching on msdn/google but I couldn't find an answer for this; why can't static_cast upcast/downcast on double ptr's?
class A
{
};
class B : public A
{
};
int _tmain(int argc, _TCHAR* argv[])
{
B** ppB = NULL;
A** ppA = static_cast<A**>(ppB);
return 0;
}
says:
error C2440: 'static_cast' : cannot convert from 'B **' to 'A **'
Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
but
B* pB = NULL;
A* pA = static_cast<A*>(pB);
works.
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