I have written a C++ Multimethod library and propose adding it to Boost. I see that the addition of such a library to Boost has been proposed in the past, and been met with relative enthusiasm. However, it has not been done. Does anyone know why previous attempts were aborted? I want to be sure there is a demand before starting the somewhat daunting task of boostifying and documenting my library. The library works by requiring clients to register user types of interest, and specify their public base classes. This allows traversing class hierarchies at run-time. A multimethod uses this information to perform run-time overload resolution on registered methods to determine the best implementation based on the type-id of each parameter. There are no restrictions on the types of a multimethod's parameters, although only single indirections to user types will behave polymorphically. The library is designed to behave well when used by other libraries. To declare a new method, the client is required to derive a new type from the multimethod type. This allows multiple multimethods with the same parameters in different libraries. It also allows encapsulation of each multimethod implementation within each library, reducing the chance of conflict between different libraries that were compiled with different versions of the multimethod library. Is there any interest in including my library in Boost? Nick