Object backing the pointer will be destroyed at the end of the full-expression

Explanation:

In C++, an “object backing the pointer” refers to the object that a pointer is pointing to.

When the object backing the pointer is destroyed at the end of the full-expression, it means that the lifetime of the object is over and it will be deallocated from memory.

Here’s an example to illustrate this:

    
      int* ptr = new int(5); // Creating a new integer object and assigning its address to ptr
      
      // Some code...
      // ...
      
      delete ptr; // Deleting the object backing the pointer
      // The memory allocated to store the integer object is deallocated
      
      // Some more code...
      // ...
      
      // Now, if we try to access the value pointed to by ptr, it will lead to undefined behavior
      // as the object has been destroyed
    
  

In the example above, we allocate memory for an integer object using the “new” keyword, and assign its address to the pointer variable “ptr”. Later, when we call “delete ptr”, the object backing the pointer is destroyed and the memory is deallocated.

After the object is destroyed, trying to access the value pointed to by the pointer will result in undefined behavior, as the memory it was pointing to no longer holds a valid object.