Q:  What is the difference between a named initializer and a compound literal?

A:  A named initializer is used on the line where the variable was declared.
    (Assigning to a variable for the first time is called "initializing" the variable.)

       struct Node temp_node = { .value = 5, .next = NULL };

    A compound literal can be used in any assignment (rhs) or to pass a parameter.
    It gives you the same kind of flexibility you have with string literals (e.g., "abc")
    and numeric literals (e.g., 3, 3.1415), but with compound types, such as structs
    and arrays.

       temp_node = (struct Node) { .value = 5, .next = NULL };
    
    It looks just like a named initializer, but with something resembling a
    cast ('(struct Node)') in front of it.