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Groups > comp.lang.c++ > #88727
| From | Keith Thompson <Keith.S.Thompson+u@gmail.com> |
|---|---|
| Newsgroups | comp.lang.c++ |
| Subject | Re: A string pointer to a static or dynamic string : how to free the dynamic one ? |
| Date | 2023-01-22 13:07 -0800 |
| Organization | None to speak of |
| Message-ID | <87wn5egtw8.fsf@nosuchdomain.example.com> (permalink) |
| References | (3 earlier) <tqj6jh$48g$3@gioia.aioe.org> <604d1f9c-51b9-4e7d-9c69-25b235a0eb5en@googlegroups.com> <tqjisu$unr$1@gioia.aioe.org> <sbfzL.383809$iU59.50359@fx14.iad> <tqk620$17ts$1@gioia.aioe.org> |
"R.Wieser" <address@not.available> writes:
> "Richard Damon" <Richard@Damon-Family.org> wrote in message
> news:sbfzL.383809$iU59.50359@fx14.iad...
>> On 1/22/23 9:40 AM, R.Wieser wrote:
>>> If an address which is pointing to a sequence of characters is called a
>>> "pointer to a string" - normally referred to as "a string pointer" - ,
>>> what should the variable which stores that addres be called ?
>>
>> A pointer to string (with type pointer to char).
>
> Yep. Both referred to with the exact same name. And that confuses the h*ll
> outof someone who has to listen to someone talking about two different
> things, but uses the same word for both. :-(
>
> Why do you think I asked ?
>
>> If you need to distinguish them, one is a value, and the other is a
>> variable
>
> You know that, I know that. But listening to people talking about both
> using the same "string pointer" name I have to wonder if they do ...
If I understand you correctly, the two things you're referring to are
the pointer *value* and an *object* of pointer type that holds that
value.
There's nothing special about pointers to strings here. The same
confusion occurs with, for example, a pointer to an int (which is
convenient, because we can discuss this without dragging C into the
discussion).
int n = 42;
int* ptr = &n;
The result of evaluating the expression `&n`, or the expression
`ptr`, is a value of type `int*`. We commonly refer to this value as
"a pointer" (or "an address").
The object named `ptr` is an object (variable) of type `int*`.
We also commonly refer to this object as "a pointer" (though not as
"an address").
Similarly we can refer either to `42` or to the object `n` as
"an integer" or "an int".
Usually this isn't a problem. In most contexts, the distinction
between a value of some type and an object/variable that holds a
value of some type either isn't important or is sufficiently clear
from the context.
For cases where the ambiguity is important, I find it useful
to think of the word "pointer" (as well as "array", "integer",
etc.) as an adjective rather than a noun. Thus we can refer to a
*pointer value*, or a *pointer object", or a *pointer type*, or a
*pointer expression*, all of which are clearly distinct concepts.
I'll note that the C and C++ standards often do not use this level
of precision (and in most cases they probably don't need to).
<OT>
For C's definition of a "pointer to a string", I'd say it refers
to a *value* of pointer type. An object of type char* might have a
current value that is a pointer to a string, but then after a value
is assigned to it it might not. The state of being a "pointer to
a string" applies to the value, not to the object that currently
happens to hold such a value.
I don't recall seeing a use of the term "pointer to a string" that
was confusing because it could refer to either a value or an object.
</OT>
--
Keith Thompson (The_Other_Keith) Keith.S.Thompson+u@gmail.com
Working, but not speaking, for XCOM Labs
void Void(void) { Void(); } /* The recursive call of the void */
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A string pointer to a static or dynamic string : how to free the dynamic one ? "R.Wieser" <address@not.available> - 2023-01-21 15:28 +0100
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? Paavo Helde <eesnimi@osa.pri.ee> - 2023-01-21 16:40 +0200
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? Bonita Montero <Bonita.Montero@gmail.com> - 2023-01-21 15:57 +0100
Re: A string pointer to a static or dynamic string : how to free the Muttley@dastardlyhq.com - 2023-01-21 16:20 +0000
Re: A string pointer to a static or dynamic string : how to free the Paavo Helde <eesnimi@osa.pri.ee> - 2023-01-21 20:15 +0200
Re: A string pointer to a static or dynamic string : how to free the Muttley@dastardlyhq.com - 2023-01-23 09:25 +0000
Re: A string pointer to a static or dynamic string : how to free the Paavo Helde <eesnimi@osa.pri.ee> - 2023-01-23 12:11 +0200
Re: A string pointer to a static or dynamic string : how to free the Muttley@dastardlyhq.com - 2023-01-23 10:14 +0000
Re: A string pointer to a static or dynamic string : how to free the Paavo Helde <eesnimi@osa.pri.ee> - 2023-01-23 14:14 +0200
Re: A string pointer to a static or dynamic string : how to free the Muttley@dastardlyhq.com - 2023-01-23 12:27 +0000
Re: A string pointer to a static or dynamic string : how to free the Paavo Helde <eesnimi@osa.pri.ee> - 2023-01-23 17:56 +0200
Re: A string pointer to a static or dynamic string : how to free the Muttley@dastardlyhq.com - 2023-01-23 16:11 +0000
Re: A string pointer to a static or dynamic string : how to free the Paavo Helde <eesnimi@osa.pri.ee> - 2023-01-23 18:58 +0200
Re: A string pointer to a static or dynamic string : how to free the Muttley@dastardlyhq.com - 2023-01-23 17:18 +0000
Re: A string pointer to a static or dynamic string : how to free the Paavo Helde <eesnimi@osa.pri.ee> - 2023-01-23 19:49 +0200
Re: A string pointer to a static or dynamic string : how to free the Cholo Lennon <chololennon@hotmail.com> - 2023-01-23 16:44 -0300
Re: A string pointer to a static or dynamic string : how to free the Muttley@dastardlyhq.com - 2023-01-24 17:05 +0000
Re: A string pointer to a static or dynamic string : how to free the Bonita Montero <Bonita.Montero@gmail.com> - 2023-01-21 19:30 +0100
Re: A string pointer to a static or dynamic string : how to free the Muttley@dastardlyhq.com - 2023-01-23 09:30 +0000
Re: A string pointer to a static or dynamic string : how to free the Bonita Montero <Bonita.Montero@gmail.com> - 2023-01-23 13:53 +0100
Re: A string pointer to a static or dynamic string : how to free the scott@slp53.sl.home (Scott Lurndal) - 2023-01-23 14:46 +0000
Re: A string pointer to a static or dynamic string : how to free the Bonita Montero <Bonita.Montero@gmail.com> - 2023-01-23 16:48 +0100
Re: A string pointer to a static or dynamic string : how to free the Muttley@dastardlyhq.com - 2023-01-23 16:09 +0000
Re: A string pointer to a static or dynamic string : how to free the Bonita Montero <Bonita.Montero@gmail.com> - 2023-01-23 17:13 +0100
Re: A string pointer to a static or dynamic string : how to free the Muttley@dastardlyhq.com - 2023-01-23 16:20 +0000
Re: A string pointer to a static or dynamic string : how to free the Bonita Montero <Bonita.Montero@gmail.com> - 2023-01-23 17:25 +0100
Re: A string pointer to a static or dynamic string : how to free the Muttley@dastardlyhq.com - 2023-01-23 16:37 +0000
Re: A string pointer to a static or dynamic string : how to free the Bonita Montero <Bonita.Montero@gmail.com> - 2023-01-23 17:40 +0100
Re: A string pointer to a static or dynamic string : how to free the Muttley@dastardlyhq.com - 2023-01-23 17:00 +0000
Re: A string pointer to a static or dynamic string : how to free the Wuns Haerst <Wuns.Haerst@wurstfabrik.at> - 2023-01-23 20:07 +0100
Re: A string pointer to a static or dynamic string : how to free the scott@slp53.sl.home (Scott Lurndal) - 2023-01-23 17:30 +0000
Re: A string pointer to a static or dynamic string : how to free the Bonita Montero <Bonita.Montero@gmail.com> - 2023-01-23 18:39 +0100
Re: A string pointer to a static or dynamic string : how to free the "james...@alumni.caltech.edu" <jameskuyper@alumni.caltech.edu> - 2023-01-23 08:40 -0800
Re: A string pointer to a static or dynamic string : how to free the Muttley@dastardlyhq.com - 2023-01-23 17:02 +0000
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? Juha Nieminen <nospam@thanks.invalid> - 2023-01-23 06:34 +0000
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? Paavo Helde <eesnimi@osa.pri.ee> - 2023-01-23 12:49 +0200
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? Juha Nieminen <nospam@thanks.invalid> - 2023-01-23 11:51 +0000
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2023-01-23 04:05 -0800
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? wij <wyniijj5@gmail.com> - 2023-01-23 04:45 -0800
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? Richard Damon <Richard@Damon-Family.org> - 2023-01-21 10:13 -0500
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? "R.Wieser" <address@not.available> - 2023-01-21 17:53 +0100
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2023-01-21 08:04 -0800
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2023-01-21 16:54 -0800
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? jak <nospam@please.ty> - 2023-01-22 10:46 +0100
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? James Kuyper <jameskuyper@alumni.caltech.edu> - 2023-01-22 05:20 -0500
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? jak <nospam@please.ty> - 2023-01-22 12:17 +0100
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? Bo Persson <bo@bo-persson.se> - 2023-01-22 12:29 +0100
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? jak <nospam@please.ty> - 2023-01-22 13:23 +0100
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? Paavo Helde <eesnimi@osa.pri.ee> - 2023-01-22 14:53 +0200
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? jak <nospam@please.ty> - 2023-01-22 19:04 +0100
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? jak <nospam@please.ty> - 2023-01-22 19:16 +0100
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? David Brown <david.brown@hesbynett.no> - 2023-01-23 09:46 +0100
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? jak <nospam@please.ty> - 2023-01-23 13:22 +0100
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? David Brown <david.brown@hesbynett.no> - 2023-01-23 14:42 +0100
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2023-01-23 06:15 -0800
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? "james...@alumni.caltech.edu" <jameskuyper@alumni.caltech.edu> - 2023-01-23 08:22 -0800
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? David Brown <david.brown@hesbynett.no> - 2023-01-23 18:02 +0100
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2023-01-23 11:14 -0800
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? "james...@alumni.caltech.edu" <jameskuyper@alumni.caltech.edu> - 2023-01-23 11:38 -0800
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2023-01-23 13:26 -0800
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? Richard Damon <Richard@Damon-Family.org> - 2023-01-22 13:24 -0500
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2023-01-22 11:00 -0800
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? James Kuyper <jameskuyper@alumni.caltech.edu> - 2023-01-22 15:39 -0500
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? James Kuyper <jameskuyper@alumni.caltech.edu> - 2023-01-22 15:28 -0500
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? "R.Wieser" <address@not.available> - 2023-01-22 12:27 +0100
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? Öö Tiib <ootiib@hot.ee> - 2023-01-22 03:42 -0800
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? David Brown <david.brown@hesbynett.no> - 2023-01-22 15:31 +0100
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? "R.Wieser" <address@not.available> - 2023-01-22 15:40 +0100
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? Richard Damon <Richard@Damon-Family.org> - 2023-01-22 13:24 -0500
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2023-01-22 11:46 -0800
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? David Brown <david.brown@hesbynett.no> - 2023-01-23 10:24 +0100
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? scott@slp53.sl.home (Scott Lurndal) - 2023-01-23 14:44 +0000
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2023-01-23 07:34 -0800
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? David Brown <david.brown@hesbynett.no> - 2023-01-23 18:05 +0100
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2023-01-23 09:37 -0800
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? scott@slp53.sl.home (Scott Lurndal) - 2023-01-23 17:37 +0000
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? "R.Wieser" <address@not.available> - 2023-01-22 21:16 +0100
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2023-01-22 13:07 -0800
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? "R.Wieser" <address@not.available> - 2023-01-23 08:33 +0100
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? James Kuyper <jameskuyper@alumni.caltech.edu> - 2023-01-23 04:00 -0500
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2023-01-23 12:34 -0800
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2023-02-02 06:43 -0800
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? "james...@alumni.caltech.edu" <jameskuyper@alumni.caltech.edu> - 2023-02-02 16:36 -0800
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2023-02-02 17:38 -0800
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2023-01-22 10:57 -0800
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? "R.Wieser" <address@not.available> - 2023-01-22 21:23 +0100
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? James Kuyper <jameskuyper@alumni.caltech.edu> - 2023-01-22 15:47 -0500
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? "R.Wieser" <address@not.available> - 2023-01-23 08:04 +0100
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? James Kuyper <jameskuyper@alumni.caltech.edu> - 2023-01-23 04:13 -0500
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? David Brown <david.brown@hesbynett.no> - 2023-01-23 10:33 +0100
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? Mike Terry <news.dead.person.stones@darjeeling.plus.com> - 2023-01-21 18:29 +0000
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? "R.Wieser" <address@not.available> - 2023-01-21 20:09 +0100
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? Richard Damon <Richard@Damon-Family.org> - 2023-01-21 16:32 -0500
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? "R.Wieser" <address@not.available> - 2023-01-22 10:52 +0100
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? Mike Terry <news.dead.person.stones@darjeeling.plus.com> - 2023-01-21 22:10 +0000
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? "R.Wieser" <address@not.available> - 2023-01-22 11:56 +0100
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? Paavo Helde <eesnimi@osa.pri.ee> - 2023-01-22 14:31 +0200
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? "R.Wieser" <address@not.available> - 2023-01-22 15:57 +0100
Re: A string pointer to a static or dynamic string : how to free the dynamic one ? Juha Nieminen <nospam@thanks.invalid> - 2023-01-23 06:40 +0000
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