[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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