On Aug 20, 2008, at 5:28 PM, Greg Ewing wrote: > Lisandro Dalcin wrote: > >> I know, I can (and I do) use 'Type arg is not >> None' in argument lists, but I never liked it. > > Speaking of that, I've been thinking for a while now > about making "not None" the default, and requiring > "or None" to specify that None is an acceptable > parameter value. > > Having seen a number of pieces of Pyrex code that > were susceptible to being crashed because "not None" > wasn't used where it should have been, I think > this would be a safer default. The change may > break some existing code, though. > > What do people think?
I use the fact that extension types can be None all over the place. Is this exclusively for arguments? Perhaps that could be OK--at least it wouldn't break existing code silently. What would it be called? "or None"? I think a mode that emits tests before every cdef attribute access to verify validity could be very useful as well. - Robert _______________________________________________ Cython-dev mailing list [email protected] http://codespeak.net/mailman/listinfo/cython-dev
