Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
| From | Keith Thompson <kst-u@mib.org> |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: Struct and Union |
| Date | 2015-07-12 12:53 -0700 |
| Organization | None to speak of |
| Message-ID | <lnh9p9m9t7.fsf@kst-u.example.com> (permalink) |
| References | <a653fc98-5fae-48ff-ba1c-d7b53adee150@googlegroups.com> <mnnu72$59k$1@dont-email.me> <d09p4cFjht7U1@mid.individual.net> <ln8uao8286.fsf@kst-u.example.com> |
Keith Thompson <kst-u@mib.org> writes:
> "Bill Davy" <Bill@SynectixLtd.com> writes:
> [...]
>> Is enum part of C?
>
> Certainly.
>
>> If so, I'd prefer enum {tPrint=1, tInput, tGoto, etc}
>> stype (or whatever the syntax is).
>
> I agree.
>
>> This makes it easier for a compiler (or checker like PC-Lint) to see
>> if a switch on stype is missing a value, which is useful when the
>> list changes later. Avoiding the enumeration value zero also
>> slightly improves your odds in that a null initialised stype is
>> incorrect.
>
> C enums are basically integers with a light sprinkling of syntactic
> sugar. Compilers, as far as I know, don't typically don't warn about
> missing values in switch statements; they certainly aren't required to
> do so.
My mistake. gcc has an option "-Wswitch" (which is also enabled by
"-Wall") to issue such warnings. clang has the same option. I don't
know about other compilers.
> Lint-like tools may or may not perform such checks. (I don't know
> whether PC-Lint does or not; it's not cheap, and it's Windows only.)
--
Keith Thompson (The_Other_Keith) kst-u@mib.org <http://www.ghoti.net/~kst>
Working, but not speaking, for JetHead Development, Inc.
"We must do something. This is something. Therefore, we must do this."
-- Antony Jay and Jonathan Lynn, "Yes Minister"
Back to comp.lang.c | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
Struct and Union janus <emekamicro@gmail.com> - 2015-07-10 00:49 -0700
Re: Struct and Union Richard Heathfield <rjh@cpax.org.uk> - 2015-07-10 09:04 +0100
Re: Struct and Union janus <emekamicro@gmail.com> - 2015-07-10 01:40 -0700
Re: Struct and Union Richard Heathfield <rjh@cpax.org.uk> - 2015-07-10 09:50 +0100
Re: Struct and Union Richard Heathfield <rjh@cpax.org.uk> - 2015-07-10 13:44 +0100
Re: Struct and Union "Bill Davy" <Bill@SynectixLtd.com> - 2015-07-10 12:37 +0100
Re: Struct and Union Keith Thompson <kst-u@mib.org> - 2015-07-10 08:24 -0700
Re: Struct and Union Keith Thompson <kst-u@mib.org> - 2015-07-12 12:53 -0700
Re: Struct and Union Ian Collins <ian-news@hotmail.com> - 2015-07-10 21:32 +1200
Re: Struct and Union "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-07-10 05:12 -0700
Re: Struct and Union Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-10 17:35 +0100
Re: Struct and Union David Kleinecke <dkleinecke@gmail.com> - 2015-07-10 10:18 -0700
Re: Struct and Union "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-07-10 10:23 -0700
Re: Struct and Union James Kuyper <jameskuyper@verizon.net> - 2015-07-10 13:47 -0400
Re: Struct and Union Keith Thompson <kst-u@mib.org> - 2015-07-10 12:38 -0700
Re: Struct and Union "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-07-10 10:27 -0700
Re: Struct and Union Bartc <bc@freeuk.com> - 2015-07-10 13:55 +0100
Re: Struct and Union Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-10 21:48 +0100
Re: Struct and Union "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-07-10 13:51 -0700
Re: Struct and Union Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-10 23:45 +0100
Re: Struct and Union "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-07-10 17:43 -0700
Re: Struct and Union Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-11 13:04 +0100
Re: Struct and Union "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-07-11 05:15 -0700
Re: Struct and Union Bartc <bc@freeuk.com> - 2015-07-11 14:01 +0100
Re: Struct and Union "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-07-11 06:05 -0700
Re: Struct and Union "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-07-11 06:13 -0700
Re: Struct and Union Keith Thompson <kst-u@mib.org> - 2015-07-11 13:51 -0700
Re: Struct and Union Martin Shobe <martin.shobe@yahoo.com> - 2015-07-11 16:51 -0500
Re: Struct and Union Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-11 23:13 +0100
Re: Struct and Union Keith Thompson <kst-u@mib.org> - 2015-07-11 17:39 -0700
Re: Struct and Union Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-11 16:56 -0700
Re: Struct and Union Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-10 18:52 -0700
Re: Struct and Union Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-10 19:12 -0700
csiph-web