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Groups > comp.lang.c > #138974
| From | "Rick C. Hodgin" <rick.c.hodgin@gmail.com> |
|---|---|
| Newsgroups | comp.lang.c, comp.lang.c++ |
| Subject | Re: Shorthand ~> pointers |
| Date | 2018-12-23 12:15 -0500 |
| Organization | Liberty Software Foundation |
| Message-ID | <pvofo2$tbo$1@dont-email.me> (permalink) |
| References | (4 earlier) <pvm0dr$1e4h$1@adenine.netfront.net> <pvm0gn$u40$1@dont-email.me> <pvngo9$5ma$1@adenine.netfront.net> <pvo27l$i9t$1@dont-email.me> <7QNTD.36362$ur3.8909@fx28.am4> |
Cross-posted to 2 groups.
On 12/23/2018 10:28 AM, Bart wrote:
> Suppose you type a~~c but the path it uses isn't the one you expected?
There should be only one c. If there is more than one it would be a
syntax error.
> In my own code, very long dotted sequences are not that common, the longest
> are probably 4 or 5 names. And those tend to have multiple paths and/or
> involve recursive structs.
Mine too. I typically use 3 or 4 max.
> So the conditions to be able to use ~~ effectively are going to be rare.
On oft-used structures in my apps, for things like SWindow or SObject,
I often refer to them as SWindow* w, as well as SObject* o for a short-
hand common reference. By dropping that "anchor" of the short parent
name, and then referencing a unique name, it makes the code more clear
for instance names:
w~~left;
w~~top;
Rather than something like w->settings->rc.left, etc. It's another type
of shorthand for that reference, making it more clear in source code
what's being used, without the visual clutter of the multiple levels.
> There is one common use-case where such a shorthand would be unambiguous, and
> could save some typing, but there are only three names, so it would only save
> the middle name [a->objptr->length becomes a~~length].
That's its intent right there. And I intend to use it in my own code
only on structures / classes that are relatively stable, such as those
things which interface with the OS or my own API that has grown over
time and stabilized.
> But then that hides what is happening. When I do a lot of work with such
> terms, then I might store a->objptr into an intermediate and work with that
> (p->length). That could be more efficient.
I do this often in source code today. I did it recently for a lot of
bit structures I needed to access. It's actually where this idea came
up for the shorthand reference, as I was creating those intermediate /
unnecessary temporary references just to make the typing I had to do
less intense, the idea came to me.
> Using a~~length, I lose sight of the fact that there are these extra
> indirections, and also a~~length and a->ptr appear to be of the same rank, as
> do a~~length and b->length, although a and b must be very different types.
Correct. CAlive contains meta data on each source code line which is
used to convey the full meaning of every lex'd symbol.
> So I still think this is more usefully employed in an external tool.
I can see that argument. For CAlive, it will be a feature. It will
also extend into my support of C/C++ as it is added. But, for other
languages ... authors get to make choices. I respect yours.
--
Rick C. Hodgin
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Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-19 21:31 -0500
Re: Shorthand ~> pointers bitrex <user@example.net> - 2018-12-20 03:29 -0500
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-20 06:40 -0500
Re: Shorthand ~> pointers Andrew Smallshaw <andrews@sdf.org> - 2018-12-20 10:23 +0000
Re: Shorthand ~> pointers Bart <bc@freeuk.com> - 2018-12-20 11:15 +0000
Re: Shorthand ~> pointers David Brown <david.brown@hesbynett.no> - 2018-12-20 13:46 +0100
Re: Shorthand ~> pointers mark.bluemel@gmail.com - 2018-12-20 05:04 -0800
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-20 05:11 -0800
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-20 03:25 -0800
Re: Shorthand ~> pointers Ben Bacarisse <ben.usenet@bsb.me.uk> - 2018-12-20 11:51 +0000
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-20 06:54 -0500
Re: Shorthand ~> pointers Ben Bacarisse <ben.usenet@bsb.me.uk> - 2018-12-20 12:17 +0000
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-20 07:21 -0500
Re: Shorthand ~> pointers Ben Bacarisse <ben.usenet@bsb.me.uk> - 2018-12-20 14:18 +0000
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-20 09:26 -0500
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-20 04:29 -0800
Re: Shorthand ~> pointers mark.bluemel@gmail.com - 2018-12-20 04:46 -0800
Re: Shorthand ~> pointers David Brown <david.brown@hesbynett.no> - 2018-12-20 15:00 +0100
Re: Shorthand ~> pointers scott@slp53.sl.home (Scott Lurndal) - 2018-12-20 14:26 +0000
Re: Shorthand ~> pointers Ben Bacarisse <ben.usenet@bsb.me.uk> - 2018-12-20 15:03 +0000
Re: Shorthand ~> pointers James Kuyper <jameskuyper@alumni.caltech.edu> - 2018-12-20 07:05 -0800
Re: Shorthand ~> pointers "Fred.Zwarts" <F.Zwarts@KVI.nl> - 2018-12-20 11:16 +0100
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-20 07:16 -0500
Re: Shorthand ~> pointers Bart <bc@freeuk.com> - 2018-12-20 12:39 +0000
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-20 08:20 -0500
Re: Shorthand ~> pointers Bart <bc@freeuk.com> - 2018-12-20 14:02 +0000
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-20 09:15 -0500
Re: Shorthand ~> pointers Bart <bc@freeuk.com> - 2018-12-20 17:48 +0000
Re: Shorthand ~> pointers Juha Nieminen <nospam@thanks.invalid> - 2018-12-21 11:36 +0000
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-21 08:05 -0500
Re: Shorthand ~> pointers scott@slp53.sl.home (Scott Lurndal) - 2018-12-21 14:56 +0000
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-21 10:03 -0500
Re: Shorthand ~> pointers scott@slp53.sl.home (Scott Lurndal) - 2018-12-21 15:35 +0000
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-21 10:41 -0500
Re: Shorthand ~> pointers Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2018-12-21 15:41 +0000
Re: Shorthand ~> pointers scott@slp53.sl.home (Scott Lurndal) - 2018-12-21 17:04 +0000
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-21 12:23 -0500
Re: Shorthand ~> pointers scott@slp53.sl.home (Scott Lurndal) - 2018-12-21 14:57 +0000
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-21 10:20 -0500
Re: Shorthand ~> pointers scott@slp53.sl.home (Scott Lurndal) - 2018-12-21 15:37 +0000
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-21 10:42 -0500
Re: Shorthand ~> pointers Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2018-12-21 15:42 +0000
Re: Shorthand ~> pointers David Brown <david.brown@hesbynett.no> - 2018-12-21 17:39 +0100
Re: Shorthand ~> pointers scott@slp53.sl.home (Scott Lurndal) - 2018-12-21 17:05 +0000
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-21 12:24 -0500
Re: Shorthand ~> pointers "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid> - 2018-12-21 23:49 -0800
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-22 13:05 -0500
Re: Shorthand ~> pointers "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid> - 2018-12-22 16:38 -0800
Re: Shorthand ~> pointers Juha Nieminen <nospam@thanks.invalid> - 2018-12-22 18:39 +0000
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-22 13:42 -0500
Re: Shorthand ~> pointers "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid> - 2018-12-22 16:23 -0800
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-22 21:52 -0500
Re: Shorthand ~> pointers "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid> - 2018-12-22 20:26 -0800
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-22 23:54 -0500
Re: Shorthand ~> pointers Ben Bacarisse <ben.usenet@bsb.me.uk> - 2018-12-23 12:43 +0000
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-23 08:34 -0500
Re: Shorthand ~> pointers James Kuyper <jameskuyper@alumni.caltech.edu> - 2018-12-23 08:09 -0800
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-23 11:56 -0500
Re: Shorthand ~> pointers Juha Nieminen <nospam@thanks.invalid> - 2018-12-23 08:24 +0000
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-23 08:24 -0500
Re: Shorthand ~> pointers Bart <bc@freeuk.com> - 2018-12-23 15:28 +0000
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-23 12:15 -0500
Re: Shorthand ~> pointers Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2018-12-23 17:24 +0000
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-23 12:35 -0500
Re: Shorthand ~> pointers Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2018-12-23 17:39 +0000
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-23 14:07 -0500
Re: Shorthand ~> pointers Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2018-12-23 19:17 +0000
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-23 14:52 -0500
Re: Shorthand ~> pointers Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2018-12-23 21:14 +0000
Re: Shorthand ~> pointers Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2018-12-23 21:36 +0000
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-23 19:24 -0500
Re: Shorthand ~> pointers Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2018-12-24 10:14 +0000
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-24 07:53 -0500
Re: Shorthand ~> pointers gazelle@shell.xmission.com (Kenny McCormack) - 2018-12-24 14:16 +0000
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-24 10:17 -0500
Re: Shorthand ~> pointers Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2018-12-24 15:36 +0000
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-24 10:43 -0500
Re: Shorthand ~> pointers Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2018-12-24 15:46 +0000
Re: Shorthand ~> pointers "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid> - 2018-12-24 14:16 -0800
Re: Shorthand ~> pointers Melzzzzz <Melzzzzz@zzzzz.com> - 2018-12-24 22:36 +0000
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-24 18:35 -0500
Re: Shorthand ~> pointers "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid> - 2018-12-24 15:44 -0800
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-24 18:55 -0500
Re: Shorthand ~> pointers "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid> - 2018-12-25 22:20 -0800
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-26 05:32 -0500
You are so full of shit (Was: Shorthand ~> pointers) gazelle@shell.xmission.com (Kenny McCormack) - 2018-12-26 14:10 +0000
Re: You are so full of .. (Was: Shorthand ~> pointers) "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-26 09:47 -0500
Re: You are so full of shit (Was: Shorthand ~> pointers) gazelle@shell.xmission.com (Kenny McCormack) - 2018-12-26 15:21 +0000
Re: Shorthand ~> pointers Ian Collins <ian-news@hotmail.com> - 2018-12-24 08:26 +1300
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-23 15:02 -0500
Re: Shorthand ~> pointers Tim Rentsch <txr@alumni.caltech.edu> - 2018-12-28 08:21 -0800
Re: Shorthand ~> pointers nobody@example.org (Scott) - 2018-12-25 03:56 +0000
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-24 23:55 -0500
Re: Shorthand ~> pointers Richard Damon <Richard@Damon-Family.org> - 2018-12-25 10:14 -0500
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-25 10:36 -0500
Re: Shorthand ~> pointers Juha Nieminen <nospam@thanks.invalid> - 2018-12-24 14:22 +0000
Re: Shorthand ~> pointers "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid> - 2018-12-24 15:47 -0800
Re: Shorthand ~> pointers Reinhardt Behm <rbehm@hushmail.com> - 2018-12-23 16:31 +0800
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-23 08:28 -0500
Re: Shorthand ~> pointers nobody@example.org (Scott) - 2018-12-21 01:14 +0000
Re: Shorthand ~> pointers "Alf P. Steinbach" <alf.p.steinbach+usenet@gmail.com> - 2018-12-21 03:23 +0100
Re: Shorthand ~> pointers nobody@example.org (Scott) - 2018-12-21 09:45 +0000
Re: Shorthand ~> pointers David Brown <david.brown@hesbynett.no> - 2018-12-21 12:05 +0100
Re: Shorthand ~> pointers Vir Campestris <vir.campestris@invalid.invalid> - 2018-12-21 21:24 +0000
Re: Shorthand ~> pointers scott@slp53.sl.home (Scott Lurndal) - 2018-12-21 21:47 +0000
Re: Shorthand ~> pointers David Brown <david.brown@hesbynett.no> - 2018-12-22 16:09 +0100
Re: Shorthand ~> pointers Richard Damon <Richard@Damon-Family.org> - 2018-12-22 11:49 -0500
Re: Shorthand ~> pointers Bart <bc@freeuk.com> - 2018-12-22 18:41 +0000
Re: Shorthand ~> pointers Anton Shepelev <anton.txt@gmail.com> - 2018-12-22 21:48 +0300
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-22 14:00 -0500
Re: Shorthand ~> pointers Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2018-12-22 19:08 +0000
Re: Shorthand ~> pointers fir <profesor.fir@gmail.com> - 2018-12-22 16:42 -0800
Re: Shorthand ~> pointers Richard Damon <Richard@Damon-Family.org> - 2018-12-22 17:10 -0500
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-22 17:42 -0500
Re: Shorthand ~> pointers Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2018-12-23 10:19 +0000
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-23 08:40 -0500
Re: Shorthand ~> pointers Jorgen Grahn <grahn+nntp@snipabacken.se> - 2018-12-25 21:00 +0000
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-21 07:57 -0500
Re: Shorthand ~> pointers Bonita Montero <Bonita.Montero@gmail.com> - 2018-12-24 14:38 +0100
Re: Shorthand ~> pointers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-12-24 10:26 -0500
Re: Shorthand ~> pointers Bonita Montero <Bonita.Montero@gmail.com> - 2018-12-28 13:35 +0100
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