Lightweight function syntax: no need to change Lua

[Dirk Laurie <dpl@...>]

The following syntax:

    ('a,b,c')('a+b+c') == function(a,b,c) return a+b+c end

is available after doing this chunk:

    getmetatable("").__call = 
      function(arg,res)
        if #arg>0 then return load(arg.."=...; return "..res)
        else return load("return "..res)
        end
      end

Dirk
(Apologies if someone has already pointed out this obvious trick.  
I started reading the discussion somewhere in the middle.)