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| From | Bartc <bc@freeuk.com> |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: Making C more beautiful by not using macros with arguments |
| Date | 2015-05-31 21:48 +0100 |
| Organization | A noiseless patient Spider |
| Message-ID | <mkfs04$91l$1@dont-email.me> (permalink) |
| References | (6 earlier) <mkejo1$k6c$1@dont-email.me> <87zj4lhxsc.fsf@bsb.me.uk> <ce45f467-6f93-415e-b23f-abd26728bf7e@googlegroups.com> <mkffqo$luc$1@dont-email.me> <87r3pwikdo.fsf@kst-u.example.com> |
On 31/05/2015 21:04, Keith Thompson wrote:
> Bartc <bc@freeuk.com> writes:
>> How many people know that it can also be written like this:
>>
>> int (main(void)) {}
>>
>> (with the extra parentheses)? At least one C compiler doesn't!
>
> I didn't know that, but I verified it by compiling with gcc and checking
> the syntax in the standard.
>
> Which compiler?
It was Digital Mars' compiler that didn't like it. This is quite an old
one from 2004, but presumably that syntax existed long before.
(But it compiles 'int (main(void));' OK.)
> This makes it impossible to parse C without feedback from the
> symbol table.
Yes, but not just that. It might only be possible to build the symbol
table by processing macros, typedefs and conditional code that come
before; in fact you need to implement half of a C compiler.
Even then it can be impossible to properly parse 'f(g(h));' if 'f' for
example depends on a conditional macro which is submitted as a compiler
option, or somehow depends on the current environment.
So for browsing C source code via automatic tools (especially in
isolation from a specific build, compiler or target), or if you want to
do a /one-off/ translation into some other form, then C can present
difficulties.
(It doesn't make it any easier for a human reader either!)
--
Bartc
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Making C more beautiful by not using macros with arguments David Kleinecke <dkleinecke@gmail.com> - 2015-05-29 10:36 -0700
Re: Making C more beautiful by not using macros with arguments Bartc <bc@freeuk.com> - 2015-05-29 19:04 +0100
Re: Making C more beautiful by not using macros with arguments David Kleinecke <dkleinecke@gmail.com> - 2015-05-30 07:30 -0700
Re: Making C more beautiful by not using macros with arguments Bartc <bc@freeuk.com> - 2015-05-30 15:51 +0100
Re: Making C more beautiful by not using macros with arguments Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-05-29 19:26 +0100
Re: Making C more beautiful by not using macros with arguments David Kleinecke <dkleinecke@gmail.com> - 2015-05-30 07:38 -0700
Re: Making C more beautiful by not using macros with arguments Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-05-30 21:44 +0100
Re: Making C more beautiful by not using macros with arguments Bartc <bc@freeuk.com> - 2015-05-30 23:58 +0100
Re: Making C more beautiful by not using macros with arguments Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-05-31 00:27 +0100
Re: Making C more beautiful by not using macros with arguments Bartc <bc@freeuk.com> - 2015-05-31 10:21 +0100
Re: Making C more beautiful by not using macros with arguments Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-05-31 11:00 +0100
Re: Making C more beautiful by not using macros with arguments David Kleinecke <dkleinecke@gmail.com> - 2015-05-31 09:45 -0700
Re: Making C more beautiful by not using macros with arguments Bartc <bc@freeuk.com> - 2015-05-31 18:20 +0100
Re: Making C more beautiful by not using macros with arguments Keith Thompson <kst-u@mib.org> - 2015-05-31 13:04 -0700
Re: Making C more beautiful by not using macros with arguments Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2015-05-31 16:11 -0400
Re: Making C more beautiful by not using macros with arguments Bartc <bc@freeuk.com> - 2015-05-31 21:48 +0100
Re: Making C more beautiful by not using macros with arguments Keith Thompson <kst-u@mib.org> - 2015-05-31 14:22 -0700
Re: Making C more beautiful by not using macros with arguments David Kleinecke <dkleinecke@gmail.com> - 2015-06-01 11:33 -0700
Re: Making C more beautiful by not using macros with arguments Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-05-31 20:37 +0100
Re: Making C more beautiful by not using macros with arguments Keith Thompson <kst-u@mib.org> - 2015-05-31 14:18 -0700
Re: Making C more beautiful by not using macros with arguments Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-05-31 22:44 +0100
Re: Making C more beautiful by not using macros with arguments Bartc <bc@freeuk.com> - 2015-05-31 23:16 +0100
Re: Making C more beautiful by not using macros with arguments David Kleinecke <dkleinecke@gmail.com> - 2015-06-01 11:58 -0700
Re: Making C more beautiful by not using macros with arguments Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-06-02 01:14 +0100
Re: Making C more beautiful by not using macros with arguments Bartc <bc@freeuk.com> - 2015-06-02 10:31 +0100
Re: Making C more beautiful by not using macros with arguments Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-06-02 11:06 +0100
Re: Making C more beautiful by not using macros with arguments Bartc <bc@freeuk.com> - 2015-06-02 11:39 +0100
Re: Making C more beautiful by not using macros with arguments "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-06-02 04:02 -0700
Re: Making C more beautiful by not using macros with arguments Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-06-02 12:24 +0100
Re: Making C more beautiful by not using macros with arguments Noob <root@127.0.0.1> - 2015-06-02 15:41 +0200
Re: Making C more beautiful by not using macros with arguments Richard Heathfield <rjh@cpax.org.uk> - 2015-06-02 15:00 +0100
Re: Trolls/Cranks/Kooks Noob <root@127.0.0.1> - 2015-06-02 16:41 +0200
Re: Trolls/Cranks/Kooks Richard Heathfield <rjh@cpax.org.uk> - 2015-06-02 15:56 +0100
Re: Trolls/Cranks/Kooks Noob <root@127.0.0.1> - 2015-06-02 17:09 +0200
Re: Trolls/Cranks/Kooks Richard Heathfield <rjh@cpax.org.uk> - 2015-06-02 16:17 +0100
Re: Making C more beautiful by not using macros with arguments Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-06-02 15:58 +0100
Re: Making C more beautiful by not using macros with arguments Dr Nick <nospam-4@temporary-address.org.uk> - 2015-06-02 19:32 +0100
Re: Making C more beautiful by not using macros with arguments David Kleinecke <dkleinecke@gmail.com> - 2015-06-02 11:00 -0700
Re: Making C more beautiful by not using macros with arguments Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-06-02 20:13 +0100
Re: Making C more beautiful by not using macros with arguments Keith Thompson <kst-u@mib.org> - 2015-05-30 15:17 -0700
Re: Making C more beautiful by not using macros with arguments David Kleinecke <dkleinecke@gmail.com> - 2015-05-31 09:12 -0700
Re: Making C more beautiful by not using macros with arguments Keith Thompson <kst-u@mib.org> - 2015-05-31 13:29 -0700
Re: Making C more beautiful by not using macros with arguments David Brown <david.brown@hesbynett.no> - 2015-05-31 17:28 +0200
Re: Making C more beautiful by not using macros with arguments Morris Dovey <mrdovey@iedu.com> - 2015-05-29 13:35 -0500
Re: Making C more beautiful by not using macros with arguments "Chris M. Thomasson" <nospam@nospam.nospam> - 2015-05-29 13:19 -0700
Re: Making C more beautiful by not using macros with arguments "Chris M. Thomasson" <nospam@nospam.nospam> - 2015-05-29 13:25 -0700
Re: Making C more beautiful by not using macros with arguments Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2015-05-29 14:23 -0600
Re: Making C more beautiful by not using macros with arguments Keith Thompson <kst-u@mib.org> - 2015-05-29 14:16 -0700
Re: Making C more beautiful by not using macros with arguments David Kleinecke <dkleinecke@gmail.com> - 2015-05-30 07:46 -0700
Re: Making C more beautiful by not using macros with arguments Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2015-05-30 18:28 -0400
Re: Making C more beautiful by not using macros with arguments David Kleinecke <dkleinecke@gmail.com> - 2015-05-31 09:27 -0700
Re: Making C more beautiful by not using macros with arguments Bartc <bc@freeuk.com> - 2015-05-31 17:59 +0100
Re: Making C more beautiful by not using macros with arguments David Kleinecke <dkleinecke@gmail.com> - 2015-06-01 11:24 -0700
Re: Making C more beautiful by not using macros with arguments Keith Thompson <kst-u@mib.org> - 2015-06-01 12:15 -0700
Re: Making C more beautiful by not using macros with arguments David Kleinecke <dkleinecke@gmail.com> - 2015-06-01 12:21 -0700
Re: Making C more beautiful by not using macros with arguments Keith Thompson <kst-u@mib.org> - 2015-06-01 12:53 -0700
Re: Making C more beautiful by not using macros with arguments Keith Thompson <kst-u@mib.org> - 2015-05-31 13:36 -0700
Re: Making C more beautiful by not using macros with arguments David Brown <david.brown@hesbynett.no> - 2015-05-31 23:26 +0200
Re: Making C more beautiful by not using macros with arguments Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-05-31 23:09 +0100
Re: Making C more beautiful by not using macros with arguments luser droog <luser.droog@gmail.com> - 2015-05-31 15:51 -0700
Re: Making C more beautiful by not using macros with arguments David Kleinecke <dkleinecke@gmail.com> - 2015-06-01 12:08 -0700
Re: Making C more beautiful by not using macros with arguments James Kuyper <jameskuyper@verizon.net> - 2015-06-01 12:38 -0400
Re: Making C more beautiful by not using macros with arguments Dr Nick <nospam-4@temporary-address.org.uk> - 2015-06-01 19:20 +0100
Re: Making C more beautiful by not using macros with arguments David Kleinecke <dkleinecke@gmail.com> - 2015-06-01 12:18 -0700
Re: Making C more beautiful by not using macros with arguments Keith Thompson <kst-u@mib.org> - 2015-05-30 15:43 -0700
Re: Making C more beautiful by not using macros with arguments David Kleinecke <dkleinecke@gmail.com> - 2015-05-31 09:32 -0700
Re: Making C more beautiful by not using macros with arguments Les Cargill <lcargill99@comcast.com> - 2015-05-29 22:07 -0500
Making C more beautiful by not using macros with arguments rick.c.hodgin@gmail.com - 2015-05-30 09:22 -0700
Re: Making C more beautiful by not using macros with arguments Morris Dovey <mrdovey@iedu.com> - 2015-05-30 14:22 -0500
Re: Making C more beautiful by not using macros with arguments Bartc <bc@freeuk.com> - 2015-05-30 21:29 +0100
Re: Making C more beautiful by not using macros with arguments Morris Dovey <mrdovey@iedu.com> - 2015-05-30 22:15 -0500
Re: Making C more beautiful by not using macros with arguments Morris Dovey <mrdovey@iedu.com> - 2015-06-08 20:16 -0500
Re: Making C more beautiful by not using macros with arguments David Brown <david.brown@hesbynett.no> - 2015-05-31 17:32 +0200
Re: Making C more beautiful by not using macros with arguments Richard Heathfield <rjh@cpax.org.uk> - 2015-06-01 22:51 +0100
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