Re: use of gettop to change functionality

[Renato Maia <maia@...>]

On 2 Mar 2011, at 05:43, steve donovan wrote:
> However, a simple C extension P could be written that could make 'for
> i,v in P(...) do' pretty optimal - it's very efficient to access
> multiple arguments in C.


I don't know about how optimal it is, but anyone interested can take a  
look at library 'vararg' (http://luarocks.org/repositories/rocks/ 
#vararg) that allows you to do:

require "vararg"
for i, v in vararg.pack(...) do
	print(i, v)
end

It creates an new closure for each call of 'vararg.pack' and the  
number of elements in the '...' cannot exceed 254 elements.

--
Renato Maia
Computer Scientist
Tecgraf/PUC-Rio
__________________________
http://www.inf.puc-rio.br/~maia/