Use base class iterator in a derived class with a template
Thursday, October 18th, 2007To tell the truth, I am still a newbie in C++. So I decided to take a evening and do a quick exercise. What I am trying to do is to write a class which uses the iterator from its ‘parent’ class:
1: #include <vector>
2: #include <iostream>
3:
4: template <typename T>
5: class myVector : public std::vector<T>
6: {
7: public:
8: void Test();
9: };
10:
11: template <typename T>
12: void myVector<T>::Test()
13: {
14: typename std::vector<T>::iterator i;
15:
16: for (i = this->begin(); i != this->end(); i++)
17: std::cout << *i << std::endl;
18:
19: return;
20: }
21:
22: int main()
23: {
24: myVector<int> v;
25: v.push_back(1);
26: v.push_back(2);
27: v.push_back(3);
28: v.push_back(4);
29: v.Test();
30: return 0;
31: }
The whole point here is the typename in line 14. That is the tricky part which took me a while to figure out. Without it the code won’t even compile. Now I can add all different kinds of sorting methods to myVector. Yes, I know it’s a bad idea. Just code for fun.
