Undocumented operator "goes to" in C++

what-is-the-name-of-this-operator: "-->" ?

#include <stdio.h>
int main()
{
    int x = 10;
     while( x --> 0 ) // x goes to 0
    {
        printf("%d ", x);
    }
}

Why ask for the name just in the comment?
It is "goes to", you named it!  Whoo!!!