[Python-Dev] Re: More int/long integration issues (original) (raw)

David Abrahams dave@boost-consulting.com
Thu, 20 Mar 2003 16:43:51 -0500

Guido van Rossum <guido@python.org> writes:

The bytecode compiler should be clever enough to see that you're writing

for i in range(...): ... and that there's no definition of range other than the built-in one (this requires a subtle change of language rules); it can then substitute an internal equivalent to xrange().

Ouch! What happens to:

   def foo(seq):
       for x in seq:
           ...

   foo(xrange(small, really_big))

if xrange dies??

-- Dave Abrahams Boost Consulting www.boost-consulting.com