OpenC++ is a version of C++ with a Metaobject Protocol. In other words, it is a tool of source-code translation for C++. Programmers can easily implement various kinds of translation so that they can define new syntax, new annotation, and new object behavior.
See Also
*[http://www.csg.is.titech.ac.jp/~chiba/openc++.html Chiba's OpenC++ Page] *Wikipedia: OpenC++ *[http://www.codeproject.com/KB/library/opencxx.aspx OpenC++ - A C++ Metacompiler and Introspection Library at The Code Project]