lua namespace and class

test.lua

namespace = {}

namespace.class = {}
namespace.class.__index=namespace.class

function namespace.class:create(name)
  print("Create a class")
  local l = {}
  setmetatable(l, namespace.class)
  l.m_name = name
  print(l.m_name)
  return l
end

function namespace.class:getName()
  print(self.l_name) --prints nill
  return self.l_name --return nill
end

c = namespace.class:create("Hello, world")
print( c:getName())