1 | #include <boost/ptr_container/ptr_list.hpp>
|
---|
2 | #include <iostream>
|
---|
3 |
|
---|
4 | using namespace std;
|
---|
5 |
|
---|
6 | class BASE
|
---|
7 | {
|
---|
8 | public:
|
---|
9 | virtual int print() const = 0;
|
---|
10 | };
|
---|
11 |
|
---|
12 | class CHILD: public BASE
|
---|
13 | {
|
---|
14 | public:
|
---|
15 | CHILD(int a) :
|
---|
16 | i(a)
|
---|
17 | {
|
---|
18 | }
|
---|
19 | int i;
|
---|
20 |
|
---|
21 | virtual int print() const
|
---|
22 | {
|
---|
23 | return i;
|
---|
24 | }
|
---|
25 | };
|
---|
26 |
|
---|
27 | int main()
|
---|
28 | {
|
---|
29 | // removing const causes it to compile
|
---|
30 | boost::ptr_list<const BASE> intList;
|
---|
31 | boost::ptr_list<const BASE>::iterator iterIntList;
|
---|
32 |
|
---|
33 | BASE *a = new CHILD(1);
|
---|
34 | BASE *b = new CHILD(2);
|
---|
35 | BASE *c = new CHILD(3);
|
---|
36 |
|
---|
37 | intList.push_back(a);
|
---|
38 | intList.push_back(b);
|
---|
39 | intList.push_back(c);
|
---|
40 |
|
---|
41 | for (iterIntList = intList.begin(); iterIntList != intList.end(); iterIntList++)
|
---|
42 | {
|
---|
43 | cout << iterIntList->print() << endl;
|
---|
44 | }
|
---|
45 |
|
---|
46 | intList.clear(); // All pointers held in list are deleted.
|
---|
47 |
|
---|
48 | }
|
---|