Is it safe to check if a pointer is null, then dereference it in the same if statement?

Question

Is the following code safe if a null pointer is passed in?

if(ptr && *ptr == value)
{
   //do something
}

Does the order of the checks

Answer 1

The former is correct and safe, the latter is not.

The built-in && operator has short-circuit semantics, meaning that the second argument is evaluated if and only if the first one is true.

(This is not the case for overloaded operators.)