|[10 earlier articles]|
|Re: Definable operators email@example.com (1997-04-02)|
|Re: Definable operators Dave@occl-cam.demon.co.uk (Dave Lloyd) (1997-04-02)|
|Re: Definable operators firstname.lastname@example.org (Craig Burley) (1997-04-03)|
|Re: Definable operators email@example.com (Francois-Rene Rideau) (1997-04-03)|
|Re: Definable operators firstname.lastname@example.org (Jerry Leichter) (1997-04-06)|
|Re: Definable operators email@example.com (1997-04-11)|
|Re: Definable operators firstname.lastname@example.org (1997-04-16)|
|Re: Definable operators email@example.com (Matthew J. Raw) (1997-04-16)|
|Re: Definable operators firstname.lastname@example.org (1997-04-16)|
|Re: Definable operators email@example.com (Tony Finch) (1997-04-18)|
|Re: Definable operators firstname.lastname@example.org (Stefan Monnier) (1997-04-18)|
|Re: Definable operators email@example.com (Craig Burley) (1997-04-18)|
|Re: Definable operators firstname.lastname@example.org (1997-04-20)|
|[21 later articles]|
|From:||email@example.com (Nick Maclaren)|
|Date:||16 Apr 1997 00:18:17 -0400|
|Organization:||University of Cambridge, England|
|References:||97-03-037 97-04-018 97-04-034 97-04-061|
Herman Rubin <firstname.lastname@example.org> wrote:
>The claim that shifting is "not that common" is questionable. I have
>used it much more for other purposes than I have done other than
>simple formatted I/O, for which it is not needed.
I agree here, though shifting is strange in two senses. Most programs
don't need it at all but, those that do, tend to use it very heavily.
More seriously, the bit manipulation operations are typically the
subset used by a certain class of mathematicians, rather than
programmers. For example, one of the most common requirements is for
the basic operation "is every bit in A also set in B?" which has to be
coded very messily in most languages.
>This is one of the problems of language designers and compiler
>writers, and even for hardware designers. It is often quite easy to
>put something in at design time, and quite difficult to find a
>work-around later. It is quite easy to destroy common notation for
>computer purposes, and hard to get it back.
And conversely. Getting rid of misguided facilities is even harder.
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