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Re: binding b-key to pageback behavior
From: |
Emanuel Berg |
Subject: |
Re: binding b-key to pageback behavior |
Date: |
Thu, 28 Nov 2019 07:34:00 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/25.1 (gnu/linux) |
VanL wrote:
>> Absolutely, but you still need to mention
>> the individual modes (or maps) and whenever
>> the scrolling stuff differs, that has to be
>> explicit as well. So ultimately the result
>> of doing that wouldn't be all that different
>> from setting it up mode by mode.
>
> In a more perfect world DWIM Mode just works.
But it works sort of like that if only modes
were to stick to the standard every-Emacs
stuff. When they don't most likely it means
they have reasons not to. And when that happens
it must be mentioned somewhere if you want to
configure it. If they didn't do it, do it
yourself VanL :)
> C17's draft N2176 page 13 point 14 is an
> unpleasant shocker.
14 EXAMPLE 5 Rearrangement for
floating-point expressions is often
restricted because of limitations in
precision as well as range.
The implementation cannot generally apply
the mathematical associative rules for
addition or multiplication, nor the
distributive rule, because of roundoff
error, even in the absence of overflow and
underflow. Likewise, implementations cannot
generally replace decimal constants in
order to rearrange expressions. In the
following fragment, rearrangements
suggested by mathematical rules for real
numbers are often not valid (see F.9).
double x, y, z;
/* ... */
x = (x * y) * z; // not equivalent to x *= y * z;
z = (x - y) + y; // not equivalent to z = x;
z = x + x * y; // not equivalent to z = x * (1.0 + y);
y = x / 5.0; // not equivalent to y = x * 0.2;
Don't download this:
http://www2.open-std.org/JTC1/SC22/WG14/www/abq/c17_updated_proposed_fdis.pdf
--
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