Legality of using operator delete on a pointer obtained from placement new

Question

I\'m dang certain that this code ought to be illegal, as it clearly won\'t work, but it seems to be allowed by the C++0x FCD.

class X { /* ... */};
void* raw         


        

Answer 1

The compiler doesn't really care that p comes from a placement new call, so it won't prevent you from issuing delete on the object. In that way, your example can be considered "legal".

That won't work though, since "placement delete" operators cannot be called explicitly. They're only called implicitly if the constructor throws, so the destructor can run.