Lua 与 C 交互，2

1.new tbClass{}, Binding "FunName" to C function "thunk" and set it's closure with upvalue;

2.rigister metatable "Class", and set metatable __index to table"tbClass"

3.new pObj, new userdata to point it, and set this userdata's metatable then push it into stack.

4.call Obj:FunName()

5.because Obj associate tbClass by metatable, so will call tbClass[FunName], then call thunk, remember thunk have upvalue.

6.when we have userdata whitch have pObj,and have upvalue,then CallFun

1.new tbClass{}，Encapsulation all Class Memeber as KLuaData. tbClass[FunName] = KLuaData.KLuaData push as userdata.

2.rigister metatable "Class", and set metatable __index to C Function "_LuaIndex"

3.push userdata who's restore pObj, and set metatable

4.Call a.FunName()

5.Call C Function _LuaIndex,in this can get pObj and KLuaData，switch kind of KLuaData，execute diff Op.

6.if KLuaData is FunData, then push pObj,and FunData, and CFun "_LuaDispatcher"，then () will Call this Fun

7.CallFun