Re: Re: Template function

[Guenter Milde <milde@xxxxxxxxxxxxxxxxxxxx>]

On Wed, 4 Dec 2002 02:16:37 -0500 wrote "John E. Davis" <davis@xxxxxxxxxxxxx>:

> It is important to point out that you should always explicitly pass
> arguments to functions that take a variable number of arguments.
> "sprintf" is one such example.  I am surprised that sprintf("%d")
> worked.

It seems like sprintf doesnot use the _NARGS variable but just takes as many
values from the stack as it needs (counting the %'s) ...

Interestingly, also the following works:

  define push_array(a)
  {
     for ($1=0; $1<length(a); $1++)
       a[$1];
  }
  
  define show_args()
  {
     $1 = "";
     loop(_NARGS)
       $1 = string(()) + ", " + $1;
     message($1);
  }
  
  show_args(push_array([1, 2, "drei"]));
or
  show_args(getbuf_info());

but not

push_array(["1", "2", "drei"]);
show_args();


The same problem occures with the 
   menu_insert_item (position, menu, name, fun [,client_data])
function.

The help text tells:
   When called with 5 arguments, the `fun' argument may be either
   a string or a reference to a function.  When the item is selected,
   the function will be called and `client_data' will be passed to it.
   
Unfortunately, functions that rely on _NARGS do not realize that data is
passed. Also, I'd like to see more than 5 args allowed,i.e. an
implementation similar to runhooks(hook, [args]).


Günter Milde

--
Milde at ife.et.tu-dresden.de


--------------------------
To unsubscribe send email to <jed-users-request@xxxxxxxxxxx> with
the word "unsubscribe" in the message body.
Need help? Email <jed-users-owner@xxxxxxxxxxx>.