Re: Empty function determination

[Rici Lake <lua@...>]

On 4-Aug-04, at 9:50 AM, Dan East wrote:

>   Lua functions are passed to my C code.  I wish to determine if the 
> Lua
> function is empty.  Is this possible?

Not really.

I don't know what problem you are trying to solve: if you are simply 
trying to avoid calling an empty function, you might consider one of 
the following alternatives:

1) Call it anyway. It doesn't take much time to execute an empty 
function.

2) Allow nil instead of a function, and test for nil.

3) Provide the following global or package member:

  function DoNothing() end

and tell them to use it instead of writing out at empty function.