Hi, there's a discussion going on on python-ideas about generic functions and multiple dispatch. Might be interesting for the fused functions implementation in Cython.
http://thread.gmane.org/gmane.comp.python.ideas/28790/focus=28848 Cython can definitely improve its own dispatch implementation. The reply I linked to is by Nick Coghlan, who also makes an interesting comment on operator overloading methods and NotImplemented: """ A *lot* of folks make the mistake of raising TypeError or NotImplementedError directly in their operator overload implementations, rather than returning the NotImplemented singleton that tells the interpreter to try the other type. Even some of the CPython builtins get that wrong, since the sq_concat and sq_repeat slots in C don't properly support the type coercion dance, so you *have* to raise the exception yourself if you're only implementing those without implementing nb_add and nb_mul (types defined in Python automatically populate both sets of C level slots if you define __add__ or __mul__). """ I think Cython could help its users here to a certain extent, if only by warning about raising TypeError explicitly in these methods and encouraging better behaviour. Stefan _______________________________________________ cython-devel mailing list cython-devel@python.org https://mail.python.org/mailman/listinfo/cython-devel
