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Groups > comp.lang.c++ > #19075
| From | Keith Thompson <kst-u@mib.org> |
|---|---|
| Newsgroups | comp.lang.c++, comp.lang.c |
| Subject | Re: C/C++ question about dynamic "static struct" |
| Date | 2012-10-19 03:05 -0700 |
| Organization | None to speak of |
| Message-ID | <lnd30eixp6.fsf@nuthaus.mib.org> (permalink) |
| References | <k5lv0a$orl$1@Kil-nws-1.UCIS.Dal.Ca> <k5m8ls$hvj$1@dont-email.me> <k5oa1d$i1t$2@speranza.aioe.org> <lnvce7ioin.fsf@nuthaus.mib.org> <k5r6ka$at5$3@speranza.aioe.org> |
Cross-posted to 2 groups.
Juha Nieminen <nospam@thanks.invalid> writes:
> In comp.lang.c++ Keith Thompson <kst-u@mib.org> wrote:
>> Which is true for *identifiers* defined as VLAs, but not for all VLAs:
>>
>> int x = /* whatever */;
>> int y = /* whatever */;
>> typedef double vla[x][y];
>> vla *ptr = malloc(sizeof *ptr);
>> if (ptr == NULL) {
>> /* allocation failed */
>> }
>
> I don't think dynamically allocated arrays with malloc() are called
> "variable length arrays". That term is quite specific and refers to
> the new C99 feature where stack-allocated arrays do not need to have
> a compile-time constant size.
The type "vla" is a variable-length array type. I happened to
allocate an object of that type via malloc(), rather than as a
declared object at block scope. The type meets the definition of
"variable length array" in N1370 6.7.6.2p4.
Not all arrays allocated with malloc() are VLAs, only those of some
VLA type:
typedef double not_a_vla[100];
not_a_vla *ptr = malloc(sizeof *not_a_vla);
--
Keith Thompson (The_Other_Keith) kst-u@mib.org <http://www.ghoti.net/~kst>
Will write code for food.
"We must do something. This is something. Therefore, we must do this."
-- Antony Jay and Jonathan Lynn, "Yes Minister"
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C/C++ question about dynamic "static struct" gus gassmann <gus@nospam.com> - 2012-10-17 06:49 -0300
Re: C/C++ question about dynamic "static struct" Noob <root@127.0.0.1> - 2012-10-17 13:08 +0200
Re: C/C++ question about dynamic "static struct" James Kuyper <jameskuyper@verizon.net> - 2012-10-17 08:19 -0400
Re: C/C++ question about dynamic "static struct" Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-10-17 15:19 +0000
Re: C/C++ question about dynamic "static struct" gus gassmann <gus@nospam.com> - 2012-10-17 18:47 -0300
Re: C/C++ question about dynamic "static struct" Ike Naar <ike@iceland.freeshell.org> - 2012-10-17 22:46 +0000
Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-18 07:13 +0000
Re: C/C++ question about dynamic "static struct" James Kuyper <jameskuyper@verizon.net> - 2012-10-17 18:58 -0400
Re: C/C++ question about dynamic "static struct" Stuart <DerTopper@web.de> - 2012-10-18 09:55 +0200
Re: C/C++ question about dynamic "static struct" jacob navia <jacob@spamsink.net> - 2012-10-18 10:13 +0200
Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-18 08:23 +0000
Re: C/C++ question about dynamic "static struct" jacob navia <jacob@spamsink.net> - 2012-10-18 11:17 +0200
Re: C/C++ question about dynamic "static struct" Ian Collins <ian-news@hotmail.com> - 2012-10-18 23:37 +1300
Re: C/C++ question about dynamic "static struct" Rui Maciel <rui.maciel@gmail.com> - 2012-10-18 15:35 +0100
Re: C/C++ question about dynamic "static struct" Öö Tiib <ootiib@hot.ee> - 2012-10-19 11:40 -0700
Re: C/C++ question about dynamic "static struct" Ian Collins <ian-news@hotmail.com> - 2012-10-18 21:45 +1300
Re: C/C++ question about dynamic "static struct" Rui Maciel <rui.maciel@gmail.com> - 2012-10-18 15:03 +0100
Re: C/C++ question about dynamic "static struct" James Kuyper <jameskuyper@verizon.net> - 2012-10-18 07:18 -0400
Re: C/C++ question about dynamic "static struct" Stuart <DerTopper@web.de> - 2012-10-18 17:43 +0200
Re: C/C++ question about dynamic "static struct" William Ahern <william@wilbur.25thandClement.com> - 2012-10-18 13:52 -0700
Re: C/C++ question about dynamic "static struct" Ian Collins <ian-news@hotmail.com> - 2012-10-19 21:34 +1300
Re: C/C++ question about dynamic "static struct" Stuart <DerTopper@web.de> - 2012-10-19 11:03 +0200
Re: C/C++ question about dynamic "static struct" "BartC" <bc@freeuk.com> - 2012-10-20 14:03 +0100
Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-19 09:27 +0000
Re: C/C++ question about dynamic "static struct" Stuart <DerTopper@web.de> - 2012-10-19 13:43 +0200
Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-19 12:46 +0000
Re: C/C++ question about dynamic "static struct" ImpalerCore <jadill33@gmail.com> - 2012-10-19 10:14 -0700
Re: C/C++ question about dynamic "static struct" Paavo Helde <myfirstname@osa.pri.ee> - 2012-10-19 14:53 -0500
Re: C/C++ question about dynamic "static struct" Öö Tiib <ootiib@hot.ee> - 2012-10-19 13:52 -0700
Re: C/C++ question about dynamic "static struct" Öö Tiib <ootiib@hot.ee> - 2012-10-19 14:13 -0700
Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-19 21:24 +0000
Re: C/C++ question about dynamic "static struct" Ian Collins <ian-news@hotmail.com> - 2012-10-20 11:47 +1300
Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-19 21:22 +0000
Re: C/C++ question about dynamic "static struct" William Ahern <william@wilbur.25thandClement.com> - 2012-10-19 11:21 -0700
Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-19 21:29 +0000
Re: C/C++ question about dynamic "static struct" James Kuyper <jameskuyper@verizon.net> - 2012-10-19 18:53 -0400
Re: C/C++ question about dynamic "static struct" Ian Collins <ian-news@hotmail.com> - 2012-10-20 12:13 +1300
Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-20 05:55 +0000
Re: C/C++ question about dynamic "static struct" Stuart <DerTopper@web.de> - 2012-10-20 13:24 +0200
Re: C/C++ question about dynamic "static struct" Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-10-20 12:54 +0100
Re: C/C++ question about dynamic "static struct" Nick Keighley <nick_keighley_nospam@hotmail.com> - 2012-10-20 06:45 -0700
Re: C/C++ question about dynamic "static struct" Ian Collins <ian-news@hotmail.com> - 2012-10-21 09:20 +1300
Re: C/C++ question about dynamic "static struct" Dombo <dombo@disposable.invalid> - 2012-10-20 22:28 +0200
Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-21 07:05 +0000
Re: C/C++ question about dynamic "static struct" Les Cargill <lcargill99@comcast.com> - 2012-10-21 02:23 -0500
Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-21 07:32 +0000
Re: C/C++ question about dynamic "static struct" "BartC" <bc@freeuk.com> - 2012-10-21 11:56 +0100
Re: C/C++ question about dynamic "static struct" Les Cargill <lcargill99@comcast.com> - 2012-10-21 12:54 -0500
Re: C/C++ question about dynamic "static struct" ptyxs <kerloch@gmail.com> - 2012-10-22 13:43 +0200
Re: C/C++ question about dynamic "static struct" gwowen <gwowen@gmail.com> - 2012-10-26 03:37 -0700
Re: C/C++ question about dynamic "static struct" Les Cargill <lcargill99@comcast.com> - 2012-10-26 07:33 -0500
Re: C/C++ question about dynamic "static struct" Nick Keighley <nick_keighley_nospam@hotmail.com> - 2012-10-27 05:14 -0700
Re: C/C++ question about dynamic "static struct" Nick Keighley <nick_keighley_nospam@hotmail.com> - 2012-10-27 05:08 -0700
Re: C/C++ question about dynamic "static struct" Les Cargill <lcargill99@comcast.com> - 2012-10-20 13:44 -0500
Re: C/C++ question about dynamic "static struct" Ian Collins <ian-news@hotmail.com> - 2012-10-21 09:09 +1300
Re: C/C++ question about dynamic "static struct" Dombo <dombo@disposable.invalid> - 2012-10-20 22:31 +0200
Re: C/C++ question about dynamic "static struct" Les Cargill <lcargill99@comcast.com> - 2012-10-21 02:11 -0500
Re: C/C++ question about dynamic "static struct" Ian Collins <ian-news@hotmail.com> - 2012-10-21 20:28 +1300
Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-21 07:40 +0000
Re: C/C++ question about dynamic "static struct" Les Cargill <lcargill99@comcast.com> - 2012-10-21 13:31 -0500
Re: C/C++ question about dynamic "static struct" Ian Collins <ian-news@hotmail.com> - 2012-10-22 08:41 +1300
Re: C/C++ question about dynamic "static struct" Les Cargill <lcargill99@comcast.com> - 2012-10-21 16:24 -0500
Re: C/C++ question about dynamic "static struct" Öö Tiib <ootiib@hot.ee> - 2012-10-21 15:05 -0700
Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-22 07:52 +0000
Re: C/C++ question about dynamic "static struct" Les Cargill <lcargill99@comcast.com> - 2012-10-22 14:02 -0500
Re: C/C++ question about dynamic "static struct" gwowen <gwowen@gmail.com> - 2012-10-26 03:41 -0700
Re: C/C++ question about dynamic "static struct" Les Cargill <lcargill99@comcast.com> - 2012-10-26 07:53 -0500
Re: C/C++ question about dynamic "static struct" James Kuyper <jameskuyper@verizon.net> - 2012-10-26 09:51 -0400
Re: C/C++ question about dynamic "static struct" James Kuyper <jameskuyper@verizon.net> - 2012-10-26 13:48 -0400
Re: C/C++ question about dynamic "static struct" ImpalerCore <jadill33@gmail.com> - 2012-10-26 07:35 -0700
Re: C/C++ question about dynamic "static struct" Paavo Helde <myfirstname@osa.pri.ee> - 2012-10-26 18:42 -0500
Re: C/C++ question about dynamic "static struct" ImpalerCore <jadill33@gmail.com> - 2012-10-27 04:21 -0700
Re: C/C++ question about dynamic "static struct" Öö Tiib <ootiib@hot.ee> - 2012-10-27 05:04 -0700
Re: C/C++ question about dynamic "static struct" Paavo Helde <myfirstname@osa.pri.ee> - 2012-10-27 08:06 -0500
Re: C/C++ question about dynamic "static struct" ImpalerCore <jadill33@gmail.com> - 2012-10-27 06:50 -0700
Re: C/C++ question about dynamic "static struct" Paavo Helde <myfirstname@osa.pri.ee> - 2012-10-27 11:13 -0500
Re: C/C++ question about dynamic "static struct" ImpalerCore <jadill33@gmail.com> - 2012-10-27 12:02 -0700
Re: C/C++ question about dynamic "static struct" Paavo Helde <myfirstname@osa.pri.ee> - 2012-10-27 15:46 -0500
Re: C/C++ question about dynamic "static struct" ImpalerCore <jadill33@gmail.com> - 2012-10-27 20:24 -0700
Re: C/C++ question about dynamic "static struct" Dombo <dombo@disposable.invalid> - 2012-10-27 20:11 +0200
Re: C/C++ question about dynamic "static struct" Nick Keighley <nick_keighley_nospam@hotmail.com> - 2012-10-27 05:43 -0700
Re: C/C++ question about dynamic "static struct" Les Cargill <lcargill99@comcast.com> - 2012-10-27 13:52 -0500
Re: C/C++ question about dynamic "static struct" Les Cargill <lcargill99@comcast.com> - 2012-10-27 14:40 -0500
Re: C/C++ question about dynamic "static struct" google@ianshome.com - 2012-10-23 12:03 -0700
Re: C/C++ question about dynamic "static struct" Nick Keighley <nick_keighley_nospam@hotmail.com> - 2012-10-27 05:35 -0700
Re: C/C++ question about dynamic "static struct" Les Cargill <lcargill99@comcast.com> - 2012-10-27 14:24 -0500
Re: C/C++ question about dynamic "static struct" Nick Keighley <nick_keighley_nospam@hotmail.com> - 2012-10-27 05:36 -0700
Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-21 07:08 +0000
Re: C/C++ question about dynamic "static struct" Les Cargill <lcargill99@comcast.com> - 2012-10-21 02:51 -0500
Re: C/C++ question about dynamic "static struct" Ian Collins <ian-news@hotmail.com> - 2012-10-21 21:09 +1300
Re: C/C++ question about dynamic "static struct" Rui Maciel <rui.maciel@gmail.com> - 2012-10-21 12:16 +0100
Re: C/C++ question about dynamic "static struct" Rui Maciel <rui.maciel@gmail.com> - 2012-10-21 11:55 +0100
Re: C/C++ question about dynamic "static struct" Les Cargill <lcargill99@comcast.com> - 2012-10-21 13:47 -0500
Re: C/C++ question about dynamic "static struct" Ian Collins <ian-news@hotmail.com> - 2012-10-22 08:46 +1300
Re: C/C++ question about dynamic "static struct" Rui Maciel <rui.maciel@gmail.com> - 2012-10-22 03:02 +0100
Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-22 08:04 +0000
Re: C/C++ question about dynamic "static struct" Tobias Müller <troplin@bluewin.ch> - 2012-10-21 18:54 +0000
Re: C/C++ question about dynamic "static struct" Ian Collins <ian-news@hotmail.com> - 2012-10-22 08:49 +1300
Re: C/C++ question about dynamic "static struct" Tobias Müller <troplin@bluewin.ch> - 2012-10-21 20:07 +0000
Re: C/C++ question about dynamic "static struct" Öö Tiib <ootiib@hot.ee> - 2012-10-21 13:53 -0700
Re: C/C++ question about dynamic "static struct" Ian Collins <ian-news@hotmail.com> - 2012-10-22 09:54 +1300
Re: C/C++ question about dynamic "static struct" Rui Maciel <rui.maciel@gmail.com> - 2012-10-22 02:41 +0100
Re: C/C++ question about dynamic "static struct" Tobias Müller <troplin@bluewin.ch> - 2012-10-22 06:12 +0000
Re: C/C++ question about dynamic "static struct" Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-10-22 20:52 +0000
Re: C/C++ question about dynamic "static struct" Öö Tiib <ootiib@hot.ee> - 2012-10-22 16:30 -0700
Re: C/C++ question about dynamic "static struct" Stuart <DerTopper@web.de> - 2012-10-23 11:22 +0200
Re: C/C++ question about dynamic "static struct" Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-10-23 16:58 +0000
Re: C/C++ question about dynamic "static struct" Rui Maciel <rui.maciel@gmail.com> - 2012-10-22 02:22 +0100
Re: C/C++ question about dynamic "static struct" Nick Keighley <nick_keighley_nospam@hotmail.com> - 2012-10-27 05:30 -0700
Re: C/C++ question about dynamic "static struct" James Kuyper <jameskuyper@verizon.net> - 2012-10-20 09:06 -0400
Re: C/C++ question about dynamic "static struct" Öö Tiib <ootiib@hot.ee> - 2012-10-20 07:43 -0700
Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-21 07:11 +0000
Re: C/C++ question about dynamic "static struct" Rui Maciel <rui.maciel@gmail.com> - 2012-10-21 11:56 +0100
Re: C/C++ question about dynamic "static struct" James Kuyper <jameskuyper@verizon.net> - 2012-10-21 07:43 -0400
Re: C/C++ question about dynamic "static struct" Öö Tiib <ootiib@hot.ee> - 2012-10-21 10:36 -0700
Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-22 08:13 +0000
Re: C/C++ question about dynamic "static struct" Steve Thompson <stevet810@gmail.com> - 2012-10-22 15:08 +0000
Re: C/C++ question about dynamic "static struct" James Kuyper <jameskuyper@verizon.net> - 2012-10-22 14:42 -0400
Re: C/C++ question about dynamic "static struct" Rui Maciel <rui.maciel@gmail.com> - 2012-10-21 10:12 +0100
Re: C/C++ question about dynamic "static struct" Les Cargill <lcargill99@comcast.com> - 2012-10-20 13:24 -0500
Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-21 07:16 +0000
Re: C/C++ question about dynamic "static struct" Les Cargill <lcargill99@comcast.com> - 2012-10-21 13:57 -0500
Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-22 08:17 +0000
Re: C/C++ question about dynamic "static struct" Fritz Wuehler <fritz@spamexpire-201210.rodent.frell.theremailer.net> - 2012-10-20 22:41 +0200
Re: C/C++ question about dynamic "static struct" Dombo <dombo@disposable.invalid> - 2012-10-21 01:04 +0200
Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-21 07:23 +0000
Re: C/C++ question about dynamic "static struct" Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-10-21 19:33 +0000
Re: C/C++ question about dynamic "static struct" Greg Martin <greg@softsprocket.com> - 2012-10-21 13:20 -0700
Re: C/C++ question about dynamic "static struct" Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-10-23 15:44 +0000
Re: C/C++ question about dynamic "static struct" Dombo <dombo@disposable.invalid> - 2012-10-23 20:01 +0200
Re: C/C++ question about dynamic "static struct" Stuart <DerTopper@web.de> - 2012-10-24 12:01 +0200
Re: C/C++ question about dynamic "static struct" Dombo <dombo@disposable.invalid> - 2012-10-24 20:31 +0200
Re: C/C++ question about dynamic "static struct" Nick Keighley <nick_keighley_nospam@hotmail.com> - 2012-10-20 06:13 -0700
Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-21 07:25 +0000
Re: C/C++ question about dynamic "static struct" Nick Keighley <nick_keighley_nospam@hotmail.com> - 2012-10-27 05:54 -0700
Re: C/C++ question about dynamic "static struct" Old Wolf <oldwolf@inspire.net.nz> - 2012-11-11 14:58 -0800
Re: C/C++ question about dynamic "static struct" gof@somewhere.invalid (Adam Wysocki) - 2012-11-12 10:33 +0000
Re: C/C++ question about dynamic "static struct" Ian Collins <ian-news@hotmail.com> - 2012-10-18 12:19 +1300
Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-18 07:06 +0000
Re: C/C++ question about dynamic "static struct" Noob <root@127.0.0.1> - 2012-10-18 11:36 +0200
Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-19 09:28 +0000
Re: C/C++ question about dynamic "static struct" Noob <root@127.0.0.1> - 2012-10-19 12:07 +0200
Re: C/C++ question about dynamic "static struct" gus gassmann <gus@nospam.com> - 2012-10-19 08:03 -0300
Re: C/C++ question about dynamic "static struct" Fritz Wuehler <fritz@spamexpire-201210.rodent.frell.theremailer.net> - 2012-10-20 07:14 +0200
Re: C/C++ question about dynamic "static struct" James Kuyper <jameskuyper@verizon.net> - 2012-10-19 06:58 -0400
Re: C/C++ question about dynamic "static struct" James Kuyper <jameskuyper@verizon.net> - 2012-10-17 08:29 -0400
Re: C/C++ question about dynamic "static struct" Richard Damon <news.x.richarddamon@xoxy.net> - 2012-10-17 08:35 -0400
Re: C/C++ question about dynamic "static struct" James Kuyper <jameskuyper@verizon.net> - 2012-10-17 08:49 -0400
Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-18 07:10 +0000
Re: C/C++ question about dynamic "static struct" Keith Thompson <kst-u@mib.org> - 2012-10-18 12:11 -0700
Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-19 09:30 +0000
Re: C/C++ question about dynamic "static struct" Keith Thompson <kst-u@mib.org> - 2012-10-19 03:05 -0700
Re: C/C++ question about dynamic "static struct" James Kuyper <jameskuyper@verizon.net> - 2012-10-19 07:37 -0400
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