11.11.2015 16:22, Jim Starkey wrote: > Multiple inheritance with common base classes is, in fact, a mess. The > problem is that the C++ compiler can't really know whether two like > named methods in different classes are the same and has no way to known > which to reference in vtable. This shows up when trying to use C++ pure > virtual classes as Java interfaces. In Java, this isn't inheritance but > in C++ it is. > > An example is the C++ bind of JDBC that Vulcan used internally. > Statement and PreparedStatement are each pure virtual classes > PreparedStatement inheriting from Statement. The implementation class > of PreparedStatement has to inherit from both the PreparedStatement pure > virtual class and the implementation class of Statement. The compiler, > however, can't know whether to inherit, say, getResultSet() from the > implementation class or from the pure virtual class.
New compilers and new C++ standards solved that, AFAIK. -- WBR, SD. ------------------------------------------------------------------------------ Firebird-Devel mailing list, web interface at https://lists.sourceforge.net/lists/listinfo/firebird-devel
