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#include <memory>
#include <iostream>
using namespace std;
#if 0
struct X
{
~X()
{
cout << "destr\n";
}
};
template<typename T>
struct ArrayDeleter
{
void operator()(T* p)
{
delete [] p;
}
};
int main()
{
shared_ptr<X> sp(new X[3], ArrayDeleter<X>());
shared_ptr<float> sp(new float[16], ArrayDeleter<float>());
}
#else
//SHAREDARRAY
struct X
{
~X()
{
cout << "destr\n"; // show the object's destruction
}
};
template <typename Type>
class shared_array: public shared_ptr<Type>
{
struct Deleter // Deleter receives the pointer
{ // and calls delete[]
void operator()(Type* ptr)
{
delete[] ptr;
}
};
public:
shared_array(Type *p) // other constructors
: // not shown here
shared_ptr<Type>(p, Deleter())
{}
Type &operator[](size_t idx) // index operators
{
return shared_ptr<Type>::get()[idx];
}
Type const &operator[](size_t idx) const
{
return shared_ptr<Type>::get()[idx];
}
Type &operator*() = delete; // delete pointless members
Type const &operator*() const = delete;
Type *operator->() = delete;
Type const *operator->() const = delete;
};
int main()
{
shared_array<X> sp(new X[3]);
sp[0] = sp[1];
}
//=
#endif
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