gistfile1.lua

local _table = {
  target = {
    health = (function()return 20 end)
  },
  player = {
    health = (function()return 20 end)
  },
}

local table = {

}

local meta = {
  __index = function(t, k)
    return _table[k]
  end;
  __call = function(t, ...)
    return t[select(1, ...)]
  end;
}

setmetatable(table,meta)

print(table.target.health)