collection.h


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26

#ifndef _COLLECTION_H_
#define _COLLECTION_H_

class Collection
{
  public:
    virtual ~Collection() {}

    virtual void add(int) = 0;
    virtual bool remove(int) = 0;
    virtual Collection& operator=(const Collection&) = 0;
    virtual int operator[](int) = 0;
    virtual Collection *copy(void) = 0;

    int get_size(void) const;
    void iterate(void (*)(int *));
    virtual bool contains(int) const;

  private:
  protected:
    Collection() : size_(0) {}
    int size_;
};

#endif