你的CPP=我的CPP

-- liu.lua
-- Common Lua Function
-- Author: Liu Denghong
-- Date: 20080630

liu = liu or {version='0.1';};

-- Examp: liu.Apply(liu, {a=1,b=2});
liu.Apply = function(o, c, defaults)
  if defaults then
    liu.Apply(o, defaults);
  end
  if (o and c and type(c)=="table") then
    for p,v in pairs(c) do
      o[p] = v;
    end
  end
end

liu.Apply(liu, {
  EmptyFn = function() end;

  Num = function(v, defaultValue)
    if(type(v) ~= "number") then
      return defaultValue;
    end
    return v;
  end;

});