1using System;
 2
 3namespace jive
 4{
 5  public class Year
 6  {
 7    readonly int the_underlying_year;
 8
 9    public Year(int year) : this(new DateTime(year, 01, 01))
10    {
11    }
12
13    public Year(DateTime date)
14    {
15      the_underlying_year = date.Year;
16    }
17
18    static public implicit operator Year(int year)
19    {
20      return new Year(year);
21    }
22
23    public bool Equals(Year obj)
24    {
25      if (ReferenceEquals(null, obj)) return false;
26      if (ReferenceEquals(this, obj)) return true;
27      return obj.the_underlying_year == the_underlying_year;
28    }
29
30    public override bool Equals(object obj)
31    {
32      if (ReferenceEquals(null, obj)) return false;
33      if (ReferenceEquals(this, obj)) return true;
34      if (obj.GetType() != typeof (Year)) return false;
35      return Equals((Year) obj);
36    }
37
38    public override int GetHashCode()
39    {
40      return the_underlying_year;
41    }
42
43    public bool represents(DateTime time)
44    {
45      return time.Year.Equals(the_underlying_year);
46    }
47
48    public override string ToString()
49    {
50      return the_underlying_year.ToString();
51    }
52  }
53}