Re: fmgr.h: PG_NARGS() for number of arguments passed

Patch applied.  Thanks.

---------------------------------------------------------------------------


Lee Kindness wrote:
> The small context diff below corrects what seems to be an oversight in
> fmgr.h - it's discouraged to access fcinfo directly but there is no
> macro to get the number of arguments passed to the function. Checking
> the number of arguments is often useful when you have a function which
> can be called like:
>
>  func('arg');
>  func(null);
>  func();
>
> all mapping to the same C function.
>
> the macro has a function-like appearance to match the other PG_*
> macros.
>
> Regards, Lee Kindness.
>
> Index: fmgr.h
> ===================================================================
> RCS file: /projects/cvsroot/pgsql-server/src/include/fmgr.h,v
> retrieving revision 1.24
> diff -c -r1.24 fmgr.h
> *** fmgr.h    2002/09/04 20:31:36    1.24
> --- fmgr.h    2002/09/10 13:25:06
> ***************
> *** 116,121 ****
> --- 116,126 ----
>   #define PG_FUNCTION_ARGS    FunctionCallInfo fcinfo
>
>   /*
> +  * Get number of arguments passed to function.
> +  */
> + #define PG_NARGS() (fcinfo->nargs)
> +
> + /*
>    * If function is not marked "proisstrict" in pg_proc, it must check for
>    * null arguments using this macro.  Do not try to GETARG a null argument!
>    */
>
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