【行为型】TemplateMethod模式

 1 namespace template_method
 2 {
 3     class IAbstractClass
 4     {
 5     public:
 6         // some code here........
 7         void doSomething() {
 8             this->Step1();
 9             this->Step2(); // call subclass impl.
10             this->Step3();
11             this->StepN();
12         }
13 
14     protected:
15         void Step1() { /*some code here........*/ }
16         virtual void Step2() = 0;
17         void Step3() { /*some code here........*/ }
18         void StepN() { /*some code here........*/ }
19 
20     };//class IAbstractClass
21 
22     class ContextClass : public IAbstractClass
23     {
24     protected:
25         virtual void Step2() override {
26             // do something here........
27         }
28 
29     };//class ContextClass
30 
31 }//namespace template_method