Overflow-less integer arithmetic?
dalke at acm.org
Mon Aug 20 03:40:45 CEST 2001
>Do you really find such OverflowErrors more useful than not? I'm asking
>because PEP 237 seeks to eradicate them:
Despite what I said yesterday, I have used and needed lont ints
a few times in real code. There are two cases:
1) I expect to get large values (>2**31) frequently
2) I expect to get them infrequently
Case #1 is the more common, and is solved by using an 'L' in the
appropriate initialization. There have been many times when the
omission of the L was not caught until the testing phase, which
means automatic conversion would have been prefered.
Case #2 has only occured once, where >98% of the times the
value could fit in a regular integer and I wanted the
faster math performance. In that case I did
redo the operation with longs
So I have have no problems with the current 237 PEP, where
int operations convert to long rather than raising an exception.
dalke at dalkescientific.com
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