How to delete object constructed via placement new operator?

Question

char * buf = new char[sizeof(T)];
new (buf) T;
T * t = (T *)buf;
//code...
//here I should destruct *t but as it is argument of template and can be
//instantiated vi         


        

Answer 1

You first destruct the object by directly calling the destructor:

t->~T();

Then you destroy the memory by calling delete[] on the pointer returned from new[]:

delete []buf;