lua-面向对象

Account={num=0};

function Account.Minus(self,num)
 self.num=self.num-num;
end

function Account:AddNum(num)--:是一种语法糖，隐藏了self参数，更加方便
 self.num=self.num+num;
end

Account:AddNum(10);
print(Account.num);

Account.Minus(Account,10);
print(Account.num)

Fathter={Age=10};

function Fathter:New(c)
   c=c or {};
   setmetatable(c,self);
   self.__index=self;
   return c;
end

function Fathter:AddAge(age)
   self.Age=self.Age+age;
   print("FathterAge");
end


local sun=Fathter:New({Height=100});
print(sun.Height);
print(sun.Age);
print("--------------------------------");

local grandSun=sun:New({Weight=1000});

print(getmetatable(grandSun)==sun);
print(grandSun.Height);
print(grandSun.Age);
print(grandSun.Weight);
print("--------------------------------");


--grandSun:AddAge(10);
print(grandSun.Age);
print("--------------------------------");

function grandSun:AddAge(age)
   self.Age=self.Age+age;
   print("grandSunAge");
end


grandSun:AddAge(10);
print(grandSun.Age);

local function search(k,pList)
    for i=1,#pList do
	local v=pList[i][k]--这里相当于调用c["GetName"]
	 if v then
	  return v;
	 end
   end
end

function createClass(...)
  local c={};
  local parens={...};

  setmetatable(c,{__index=function(t,k)--第一个参数表示的原始表，第二个参数表示的所要查询的key
				 return search(k,parens);
    end
  });


  function c:New(o)
	o=o or{};
	setmetatable(o,c);
	c.__index=c;
	return o;
  end

  return c;
end

Named={Name="yy"};

function Named:GetName()
   return self.Name;
end


function Named:SetName(name)
    self.Name=name;
end


Account={balance=0};


NamedAccount=createClass(Account,Named);

accoutName=NamedAccount:New({Name="XX"});
print(accoutName:GetName());