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| From | lawrence.jones@siemens.com |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: A variation of # |
| Date | 2011-11-07 17:53 -0500 |
| Organization | Siemens PLM Software |
| Message-ID | <v44mo8-lfm.ln1@jones.homeip.net> (permalink) |
| References | <8f2cadb2-614d-4754-8bc3-bb7c063524ae@c16g2000pre.googlegroups.com> <9hqo41F4bgU2@mid.individual.net> <73822171-7a92-4420-9eea-e74bbeda1ff8@x28g2000prb.googlegroups.com> <4EB83A82.1080100@verizon.net> |
James Kuyper <jameskuyper@verizon.net> wrote:
>
> #include <stdlib.h>
> #define TRICAT(a, b, c) a ## b ## c
> #define CHAR(a, b, c) TRICAT(a, b, c)
>
> #define CASE1 x
>
...
> case CHAR('
> , CASE1, '
> ): break;
Nice try, but no cigar. The ## operator requires that the result be a
valid pp-token and, depending on the order in which the operators are
evaluated, you either end up with 'x or x', neither of which are valid
pp-tokens.
--
Larry Jones
You know how Einstein got bad grades as a kid? Well MINE are even WORSE!
-- Calvin
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A variation of # Andrey Vul <andrey.vul@gmail.com> - 2011-11-07 10:53 -0800
Re: A variation of # Ian Collins <ian-news@hotmail.com> - 2011-11-08 07:59 +1300
Re: A variation of # Andrey Vul <andrey.vul@gmail.com> - 2011-11-07 11:11 -0800
Re: A variation of # James Kuyper <jameskuyper@verizon.net> - 2011-11-07 15:07 -0500
Re: A variation of # lawrence.jones@siemens.com - 2011-11-07 17:53 -0500
Re: A variation of # James Kuyper <jameskuyper@verizon.net> - 2011-11-07 18:31 -0500
Re: A variation of # lawrence.jones@siemens.com - 2011-11-08 09:16 -0500
Re: A variation of # Thad Smith <ThadSmith@acm.org> - 2011-11-07 19:51 -0700
Re: A variation of # Harald van Dijk <truedfx@gmail.com> - 2011-11-08 09:01 -0800
Re: A variation of # James Kuyper <jameskuyper@verizon.net> - 2011-11-08 12:15 -0500
Re: A variation of # Andrey Vul <andrey.vul@gmail.com> - 2011-11-07 17:32 -0800
Re: A variation of # James Kuyper <jameskuyper@verizon.net> - 2011-11-07 21:17 -0500
Re: A variation of # Andrey Vul <andrey.vul@gmail.com> - 2011-11-07 11:08 -0800
Re: A variation of # Peter Nilsson <airia@acay.com.au> - 2011-11-07 16:46 -0800
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