Source compatibility

A lot of the ANSI/ISO language standardization changes have invalidated old, existing C++ code. It is beyond the scope of this document to try to list all such areas, but here are a few of the better-known ones:

• new keywords

• for loop variable scope change

• template specialization syntax, guiding declarations

• inline functions now extern by default

• new failure throws exception

• implicit int gone

(A more detailed discussion of some of these incompatibilities can be found in newer C++ textbooks, or in some issues of C++ Reportmagazine or the Internet McCluskey C++ Newsletter.)

In addition, the existing SCO C++ compilers (especially OpenServer) may have had bugs that caused incorrect language interpretation, but that existing code relies upon.

So the question arises, how do you get existing C++ code bases to compile on the UDK compiler?