1using System;
 2using System.Collections;
 3
 4namespace jive
 5{
 6  public static class ConversionExtensions
 7  {
 8    public static T downcast_to<T>(this object object_to_cast)
 9    {
10      return (T) object_to_cast;
11    }
12
13    public static T converted_to<T>(this object item_to_convert)
14    {
15      if (item_to_convert.is_an_implementation_of<IConvertible>())
16        return (T) Convert.ChangeType(item_to_convert, typeof (T));
17      return item_to_convert.downcast_to<T>();
18    }
19
20    public static bool is_an_implementation_of<T>(this object item)
21    {
22      return item is T;
23    }
24
25    public static void call_on<T>(this object target, Action<T> action) where T : class
26    {
27      if (target as T != null) action(target as T);
28    }
29
30    public static void call_on_each<T>(this IEnumerable items, Action<T> action) where T : class
31    {
32      foreach (var item in items) item.call_on(action);
33    }
34  }
35}