> On Wednesday 04 November 2009 09:37:55 Garth N. Wells wrote: >> kent-...@simula.no wrote: >> > Hi, I am very happy with the Expression, but old code like >> > >> > class Dabla(Function): >> > def eval(...) >> > >> > still works. >> > >> > The only problem is that the function is zero even though eval is >> > implemented. Is it >> > possible to turn this old code into an error? >> >> In C++, no. There is no mechanism in C++ to prevent a user overloading >> or hiding a member function. > > In Python, using meta classes, yes. > > This is a nice exercise for those of you who want to get to know meta > classes > in Python. ;) If and when I have time I can fix this. (Heading for the > states > next Tuesday) > > Should we allow sub-classing of Function, but not overloading of eval? > > Dr. Hake >
Dr. Hake, I like the title! I think it should not be possible to overload eval if it is not used. Kent _______________________________________________ DOLFIN-dev mailing list DOLFIN-dev@fenics.org http://www.fenics.org/mailman/listinfo/dolfin-dev