__index function in a metatable shared by several tables

[Tim Hunter <TimHunter@...>]

Sorry for the vague subject. I don't know better words to summarize my 
question.

The following code prints
1
You called foo

Is there any way for the function f to modify o.test? In my code there 
could be multiple o tables, all sharing the t metatable. I would like 
function f to store state information in each individual o table.


t = {}

setmetatable(t, {__index =
  function(_, k)
    local function f()
      print("You called " .. k)
    end
    return f
  end
})

o = setmetatable({ test=1 }, t)
t.__index = t

print(o.test)
o.foo()