在多级继承中将创建多少vtable compliler [英] how many vtable the compliler will be created in multi-level inheritance

问题描述

大家好

在多级继承中创建compliler多少vtable

Hi everyone
how many vtable the compliler will be created in multi-level inheritance

class Base
 {
 public:
    virtual void function1() {cout<<"Base :: function1()\n";};
    virtual void function2() {cout<<"Base :: function2()\n";};
    virtual ~Base(){};
};

class D1: public Base
{
public:
   ~D1(){};
   virtual void function1() { cout<<"D1 :: function1()\n";};
};

class D2: public Base
{
public:
   ~D2(){};
   virtual void function2() { cout<< "D2 :: function2\n";};
};

int main()
{
  D1 *d = new D1;;
  Base *b = d;

  b->function1();
  b->function2();

  delete (b);

  return (0);
}

推荐答案

基本上是'每个班级一个v表'。每个类意味着，一个类本身具有虚函数或覆盖其中一个父虚函数。



参见这个答案。 [ ^ ] < br $> b $ b

更有用的信息。 [ ^ ] < br $> b $ b

希望这有帮助!!

basically its 'one v-table per class'. per class means, one for a class which itself has a virtual function or overides one of the parents virtual functions.

See this answer.[^]

more useful info.[^]

hope this helps !!

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