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Groups > comp.lang.c > #109735
| From | David Brown <david.brown@hesbynett.no> |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: Help on this typedef |
| Date | 2017-05-11 10:03 +0200 |
| Organization | A noiseless patient Spider |
| Message-ID | <of15n2$2og$1@dont-email.me> (permalink) |
| References | <fc0d8572-2a06-4675-b83a-edb585ea1551@googlegroups.com> <lntw4s6q9v.fsf@kst-u.example.com> |
On 11/05/17 05:11, Keith Thompson wrote: > fl <rxjwg98@gmail.com> writes: >> I see this typedef, which has '[1]' while the below declaration without it. >> What use is '[1]'? >> >> Thanks >> >> ----------------- >> typedef __mpz_struct mpz_t[1]; > > It makes "mpz_t" an alias for the type "__mpz_struct[1]", an array of 1 > __mpz_struct. > >> //declaration: >> mpz_t s_divisor; > > This defines an object named s_divisor of type mpz_t. > The declaration is equivalent to: > > __mpz_struct s_divisor[1]; > > An array of a single element of a given type is similar to single object > of that same type, but the type and the available operations are > different. > > I suspect that this is used to achieve a kind of semi-fake > pass-by-reference semantics. An alternative possibility is that the array size in this code was not always 1, or that the author thinks it might not always be 1 in the future.
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Help on this typedef fl <rxjwg98@gmail.com> - 2017-05-10 19:12 -0700
Re: Help on this typedef Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2017-05-10 21:06 -0600
Re: Help on this typedef Keith Thompson <kst-u@mib.org> - 2017-05-10 20:11 -0700
Re: Help on this typedef David Brown <david.brown@hesbynett.no> - 2017-05-11 10:03 +0200
Re: Help on this typedef supercat@casperkitty.com - 2017-05-11 08:35 -0700
Re: Help on this typedef David Brown <david.brown@hesbynett.no> - 2017-05-12 10:34 +0200
Re: Help on this typedef joel.rees@gmail.com - 2017-05-12 06:01 -0700
Re: Help on this typedef Keith Thompson <kst-u@mib.org> - 2017-05-12 09:38 -0700
Re: Help on this typedef joel.rees@gmail.com - 2017-05-12 05:08 -0700
Re: Help on this typedef Tim Rentsch <txr@alumni.caltech.edu> - 2017-05-13 14:25 -0700
Re: Help on this typedef joel.rees@gmail.com - 2017-05-14 23:36 -0700
Re: Help on this typedef Tim Rentsch <txr@alumni.caltech.edu> - 2017-05-15 07:23 -0700
Re: Help on this typedef joel.rees@gmail.com - 2017-05-18 07:40 -0700
Re: Help on this typedef Keith Thompson <kst-u@mib.org> - 2017-05-18 09:35 -0700
Re: Help on this typedef supercat@casperkitty.com - 2017-05-18 10:59 -0700
Re: Help on this typedef joel.rees@gmail.com - 2017-05-18 23:40 -0700
Re: Help on this typedef jadill33@gmail.com - 2017-05-19 08:12 -0700
Re: Help on this typedef supercat@casperkitty.com - 2017-05-19 08:41 -0700
Re: Help on this typedef jadill33@gmail.com - 2017-05-19 09:41 -0700
Re: Help on this typedef Keith Thompson <kst-u@mib.org> - 2017-05-19 09:34 -0700
Re: Help on this typedef supercat@casperkitty.com - 2017-05-19 10:18 -0700
Re: Help on this typedef Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-05-19 21:35 +0100
Re: Help on this typedef supercat@casperkitty.com - 2017-05-19 14:16 -0700
Re: Help on this typedef Ike Naar <ike@iceland.freeshell.org> - 2017-05-19 21:15 +0000
Re: Help on this typedef Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-05-19 23:54 +0100
Re: Help on this typedef Keith Thompson <kst-u@mib.org> - 2017-05-19 14:25 -0700
Re: Help on this typedef supercat@casperkitty.com - 2017-05-19 15:18 -0700
Re: Help on this typedef Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-05-19 23:52 +0100
Re: Help on this typedef Keith Thompson <kst-u@mib.org> - 2017-05-19 16:42 -0700
Re: Help on this typedef Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-05-20 01:16 +0100
Re: Help on this typedef Tim Rentsch <txr@alumni.caltech.edu> - 2017-05-20 01:58 -0700
Re: Help on this typedef joel.rees@gmail.com - 2017-05-20 02:25 -0700
Re: Help on this typedef joel.rees@gmail.com - 2017-05-19 22:09 -0700
Re: Help on this typedef supercat@casperkitty.com - 2017-05-19 23:23 -0700
Re: Help on this typedef "James R. Kuyper" <jameskuyper@verizon.net> - 2017-05-19 13:33 -0400
Re: Help on this typedef supercat@casperkitty.com - 2017-05-19 13:44 -0700
Re: Help on this typedef jameskuyper@verizon.net - 2017-05-19 19:20 -0700
Re: Help on this typedef supercat@casperkitty.com - 2017-05-19 23:30 -0700
Re: Help on this typedef jameskuyper@verizon.net - 2017-05-20 07:20 -0700
Re: Help on this typedef jameskuyper@verizon.net - 2017-05-20 07:46 -0700
Re: Help on this typedef supercat@casperkitty.com - 2017-05-22 10:50 -0700
Re: Help on this typedef "James R. Kuyper" <jameskuyper@verizon.net> - 2017-05-18 12:37 -0400
Re: Help on this typedef Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-05-18 20:02 +0100
Re: Help on this typedef joel.rees@gmail.com - 2017-05-19 00:20 -0700
Re: Help on this typedef Keith Thompson <kst-u@mib.org> - 2017-05-19 09:51 -0700
Re: Help on this typedef supercat@casperkitty.com - 2017-05-19 10:31 -0700
Re: Help on this typedef Ike Naar <ike@iceland.freeshell.org> - 2017-05-19 19:48 +0000
Re: Help on this typedef Tim Rentsch <txr@alumni.caltech.edu> - 2017-05-20 08:47 -0700
Re: Help on this typedef "Patrick.Schluter" <Patrick.Schluter@free.fr> - 2017-05-27 18:50 +0200
Re: Help on this typedef joel.rees@gmail.com - 2017-05-12 06:17 -0700
Re: Help on this typedef supercat@casperkitty.com - 2017-05-12 08:46 -0700
Re: Help on this typedef joel.rees@gmail.com - 2017-05-12 18:11 -0700
Re: Help on this typedef Keith Thompson <kst-u@mib.org> - 2017-05-12 18:37 -0700
Re: Help on this typedef Tim Rentsch <txr@alumni.caltech.edu> - 2017-05-13 09:44 -0700
Re: Help on this typedef Keith Thompson <kst-u@mib.org> - 2017-05-13 13:47 -0700
Re: Help on this typedef Robert Wessel <robertwessel2@yahoo.com> - 2017-05-14 00:28 -0500
Re: Help on this typedef Tim Rentsch <txr@alumni.caltech.edu> - 2017-05-14 13:39 -0700
Re: Help on this typedef raltbos@xs4all.nl (Richard Bos) - 2017-05-15 13:02 +0000
Re: Help on this typedef Tim Rentsch <txr@alumni.caltech.edu> - 2017-05-15 07:30 -0700
Re: Help on this typedef supercat@casperkitty.com - 2017-05-12 20:45 -0700
Re: Help on this typedef Tim Rentsch <txr@alumni.caltech.edu> - 2017-05-13 09:57 -0700
Re: Help on this typedef Philip Lantz <prl@canterey.us> - 2017-05-13 12:07 -0700
Re: Help on this typedef David Brown <david.brown@hesbynett.no> - 2017-05-14 15:34 +0200
Re: Help on this typedef Tim Rentsch <txr@alumni.caltech.edu> - 2017-05-14 12:48 -0700
Re: Help on this typedef supercat@casperkitty.com - 2017-05-15 07:39 -0700
Re: Help on this typedef Tim Rentsch <txr@alumni.caltech.edu> - 2017-05-24 08:23 -0700
Re: Help on this typedef supercat@casperkitty.com - 2017-05-24 09:17 -0700
Re: Help on this typedef Tim Rentsch <txr@alumni.caltech.edu> - 2017-05-27 06:15 -0700
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