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bug#8611: fixnum arithmetic should not wrap around
From: |
Stefan Monnier |
Subject: |
bug#8611: fixnum arithmetic should not wrap around |
Date: |
Tue, 03 May 2011 21:31:21 -0300 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.0.50 (gnu/linux) |
> If Emacs Lisp treats too-large integers as floating point when
> reading, then its arithmetic should be consistent with this. In the
> long run perhaps it'd be better for Emacs Lisp to use bignums, but
> until then, consistent use of floating point is a better substitute
> than wraparound.
I'm not convinced that auto-switching to floats is a good idea.
Using floats has only been introduced in order to handle things like
file sizes larger than 4GB, i.e. the int-to-float conversion currently
only ever happens for values that come from some C function.
Until now the current inconsistency hasn't seemed to be a source of real
problems, so I'd rather leave it as is. If/when we bump into a real
problem due to it, we'll then see what needs to be done.
Stefan
- bug#8611: fixnum arithmetic should not wrap around, Paul Eggert, 2011/05/03
- bug#8611: fixnum arithmetic should not wrap around,
Stefan Monnier <=
- bug#8611: fixnum arithmetic should not wrap around, Paul Eggert, 2011/05/03
- bug#8611: fixnum arithmetic should not wrap around, Stefan Monnier, 2011/05/03
- bug#8611: fixnum arithmetic should not wrap around, Paul Eggert, 2011/05/04
- bug#8611: fixnum arithmetic should not wrap around, Stefan Monnier, 2011/05/04
- bug#8611: fixnum arithmetic should not wrap around, Paul Eggert, 2011/05/04
- bug#8611: fixnum arithmetic should not wrap around, Stefan Monnier, 2011/05/04