Properties && Reflections

C + +, unlike C#,java, is inherently reflective, and can only be implemented at the code level.

1. Definition

1 classClassproperty;2 classObject3 {4  Public:5     intGetintvalue (inti) {returni +1; }6  Public:7     Virtual Constclassproperty*GetProperty () {8         returnGetclasspropertys ();9     }Ten  Public: One     Static  Constclassproperty*Getclasspropertys (); A }; - structClassproperty - { the Private: -typedefvoid* (Object::* Func) (void*); -  Public: - Classproperty (): Func (nullptr), desc (nullptr) {} +Template<typename R, TypeName C, TypeName ... Args> -Classproperty (R (C::* FUNCC) (Args ...)Const=0,Const Char* desc =0) : + DESC (desc) { Atypedef R (Object::*Objfunc) (Args ...); atFunc =(Func) (Objfunc) FUNCC; -     } -Template<typename R, TypeName C, TypeName ... Args> -Classproperty (R (C::* FUNCC) (Args ...) =0,Const Char* desc =0) : - DESC (desc) { -typedef R (Object::*Objfunc) (Args ...); inFunc =(Func) (Objfunc) FUNCC; -     } to  Public: +Template<typename R, TypeName ... Args>r invoke (object* obj, Args&& .... Args)Const -     { thetypedef R (Object::*Objfunc) (Args ...); *Objfunc MF =(Objfunc) func; $         return(OBJ-&GT;*MF) (std::forward<args>(args) ...);Panax Notoginseng     } - func func; the     Const Char*desc; + }; A Constclassproperty*Object::getclasspropertys () the { +     Const StaticClassproperty prop[] = {{&object::getintvalue,"Getintvalue"},classproperty ()}; -     returnprop; $}

1. Role

1object* obj =NewObject ();2     Constclassproperty* prop = obj->GetProperty ();3      while(Prop->func! =nullptr) {4Std::cout << Prop->desc <<Std::endl;5         intRET = prop->invoke<int,int> (obj,2);6Std::cout << ret <<Std::endl;7prop++;8     }9     DeleteObj

3. Results

Getintvalue

2

Properties && Reflections