Question

We have the following:

int* a;
if(!a) //if(a == NULL) also do that
a = new int;

and the question is how to do that with int^?

int^ a;
if(?????????????)
a = gcnew int;

P.S. nullptr doesn’t solve them all, for I found the object holding value(nullptr judge as not equal) and immediately after that, using this object cause System.ObjectDisposedException.

Answer 1

Use nullptr:

int ^a = nullptr;
...
if(a == nullptr)
{
   a = gcnew int;
}
...