[BusyBox] usage.h and ##_example_usage ???
Steven Scholz
steven.scholz at imc-berlin.de
Mon Jul 26 07:48:44 UTC 2004
Erik Andersen wrote:
> On Thu Jul 22, 2004 at 02:45:15PM +0200, Steven Scholz wrote:
>
>>Hi there,
>>
>>what are the defines ##_example_usage in usage.h for?
>>For further extension?
>
>
> check out 'info cpp'. Specifically the part about
> "Macros with Variable Numbers of Arguments"
>
> This is a special feature of the GNU C preprocessor: `##'
> before a rest argument that is empty discards the preceding
> sequence of non-whitespace characters from the macro
> definition. (If another macro argument precedes, none of it
> is discarded.)
My fault! I should take some English lessons now...
I should have written
what are the defines *_example_usage in usage.h for?
I wanted to know, what the *_example_usage defines are for!
*_trivial_usage and *_full_usage are obvious. But I could not find any
reference to *_example_usage...
Ok?
--
Steven
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