How would I execute code in a string with using loadstring()?

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#1

As the title asks, how would I execute code in a string without using loadstring()? It would look like this:

str = [[
  function foo(bool)
   if bool then
    print(bool)
   end
  end
  foo(true)
 ]]

execute(str) -- prints true

I’ve tried manipulating the string by taking advantage of string patterns and functions and then storing them into a table in seperate functions and executing them all together, but that doesn’t seem to work. Any answer to my question would be appreciated.

#2

You can probably use VMs (virtual machines)

#3

Would you mind showing me the source code?

#4

The source code is over 5,000 lines, it was written by a Malaysian citizen somewhere around 2005-2007.

function luaU:make_setF(filename)
	local buff = {}
	buff.h = io.open(filename, "wb")
	if not buff.h then return nil end
	local writer =
		function(s, buff)  -- chunk writer
		if not buff.h then return 0 end
		if not s then
			if buff.h:close() then return 0 end
		else
			if buff.h:write(s) then return 0 end
		end
		return 1
	end
	return writer, buff
end

I haven’t validated whether or not it is compatible with Roblox’s Luau but ‘io.open’ as seen in this snippet is unavailable.