local registry = {}
LimitedCache = {
	new = function(self,max)
		if(not max or type(max) ~= "number") then
			error("You must provide a cache size",2)
		end
		local o = setmetatable({},self)
		registry[o] = {max = max}
		return o
	end,
	
	__newindex = function(t,k,v)
		local mt = registry[t]
		if(table.getn(mt) == mt.max) then
			t[table.remove(mt,1)] = nil
		end
		table.insert(mt,k)
		rawset(t,k,v)
	end,
}