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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