LuaInterface - how-to restrict access to .Net classes?

Question

I\'m trying to embed some Lua scripting functionality in my C# app by using LuaInterface 2.0.3. This is working just fine so far, but I can\'t figure out how to restrict access

Answer 1

--make a table for all the classes you want to expose
safeClasses = {}
--store all the ones you want
safeClasses.Form = luanet.System.Windows.Forms.Form
--etc...

--remove access to LuaInterface
luanet = nil
package.loaded.luanet = nil
--prevent future packages from being loaded
require = nil
package.loadlib = nil

You could also do this in reverse, removing the global and stored instances of LuaInterface first and then doing all the work through a local reference (which all code in the rest of the block can use):

--get a local reference to LuaInterface without clobbering the name
local luainterface = luanet

--delete the global reference to it
luanet = nil

--also delete it from the package store and disable package loading
package.loaded.luanet = nil
require = nil
package.loadlib = nil

--put luanet back locally at its original name (for convenience)
local luanet = luainterface 

--make a table for all the classes you want to expose
safeClasses = {}
--store all the ones you want
safeClasses.Form = luanet.System.Windows.Forms.Form
--etc...

(You can avoid the three-step name-preservation dance above (local luainterface=luanet; luanet=nil; local luanet=luainterface) by localizing directly to luanet and then deleting the global through the _G reference to the global table:

local luanet=_G.luanet
_G.luanet = nil

I just chose not to as a matter of personal preference.)