1namespace jive
 2{
 3  public class ChainedMapper<Left, Middle, Right> : Mapper<Left, Right>
 4  {
 5    readonly Mapper<Left, Middle> left;
 6    readonly Mapper<Middle, Right> right;
 7
 8    public ChainedMapper(Mapper<Left, Middle> left, Mapper<Middle, Right> right)
 9    {
10      this.left = left;
11      this.right = right;
12    }
13
14    public Right map_from(Left item)
15    {
16      return right.map_from(left.map_from(item));
17    }
18  }
19}