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Re: Using the GNU GMP Library for Bignums in Emacs
From: |
Richard Stallman |
Subject: |
Re: Using the GNU GMP Library for Bignums in Emacs |
Date: |
Wed, 25 Apr 2018 18:40:38 -0400 |
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> In C, if the type is unsigned then the corresponding value is
> nonnegative. That is, in C there is no such thing as a negative value
> with an unsigned type.
I know that (of course). It looks like we are miscommunicating.
> I certainly wouldn't want the behavior you suggest. Among other things,
> Emacs Lisp does not have unsigned types, and I'd rather not introduce
> such a concept into the language
I think you have misunderstood what I suggest. I am talking about changing
the behavior of %x, nothing else.
I responded to a statement about what happens in C. Did you misread that
as a proposal to change Emacs?
> > In Emacs, 0xffffffff will be a bignum.
> Whether 0xffffffff is a bignum will depend on the platform. On my 64-bit
> Emacs, 0xffffffff already is supported as a fixnum, and that wouldn't
> change if bignums were introduced to Emacs.
You're right about 64-bit systems. I often forget they exist, since
I never use them.
My argument is valid nonetheless, because that quantity is a bignum on
_some_ systems.
If we were to support _only_ 64-but systems, this argument would cease
to be valid.
--
Dr Richard Stallman
President, Free Software Foundation (https://gnu.org, https://fsf.org)
Internet Hall-of-Famer (https://internethalloffame.org)
Skype: No way! See https://stallman.org/skype.html.
- Re: Using the GNU GMP Library for Bignums in Emacs, (continued)
- Re: Using the GNU GMP Library for Bignums in Emacs, Richard Stallman, 2018/04/22
- Re: Using the GNU GMP Library for Bignums in Emacs, Helmut Eller, 2018/04/22
- Re: Using the GNU GMP Library for Bignums in Emacs, Paul Eggert, 2018/04/22
- Re: Using the GNU GMP Library for Bignums in Emacs, Richard Stallman, 2018/04/22
- Re: Using the GNU GMP Library for Bignums in Emacs, Paul Eggert, 2018/04/23
- Re: Using the GNU GMP Library for Bignums in Emacs, Richard Stallman, 2018/04/23
- Re: Using the GNU GMP Library for Bignums in Emacs, Paul Eggert, 2018/04/24
- Re: Using the GNU GMP Library for Bignums in Emacs, Helmut Eller, 2018/04/24
- Re: Using the GNU GMP Library for Bignums in Emacs, Richard Stallman, 2018/04/24
- Re: Using the GNU GMP Library for Bignums in Emacs, Paul Eggert, 2018/04/24
- Re: Using the GNU GMP Library for Bignums in Emacs,
Richard Stallman <=
- Re: Using the GNU GMP Library for Bignums in Emacs, Paul Eggert, 2018/04/25
- Re: Using the GNU GMP Library for Bignums in Emacs, Richard Stallman, 2018/04/29
- Re: Using the GNU GMP Library for Bignums in Emacs, Michael Welsh Duggan, 2018/04/30
- Re: Using the GNU GMP Library for Bignums in Emacs, Stefan Monnier, 2018/04/30
- Re: Using the GNU GMP Library for Bignums in Emacs, Richard Stallman, 2018/04/30
- Re: Using the GNU GMP Library for Bignums in Emacs, Paul Eggert, 2018/04/30
- Re: Using the GNU GMP Library for Bignums in Emacs, Richard Stallman, 2018/04/30
- Re: Using the GNU GMP Library for Bignums in Emacs, Richard Stallman, 2018/04/23
- Re: Using the GNU GMP Library for Bignums in Emacs, Stefan Monnier, 2018/04/22
Re: Using the GNU GMP Library for Bignums in Emacs, Markus Triska, 2018/04/21