In the process of learning Boost, we found that in Boost's documentation, we will mention more to Complete Type and Incomplete Type. What is the completion type? After I found MSDN, I finally discovered that the original Complete Type is the compiler to determine the type of type size. Incomplete Type is the type of the compiler cannot determine the type of type. INCOMPLETE TYPE is:
There is no confidment of the members of the Struct without determining the member's Union does not determine the size of the size.
Take a look at MSDN:
