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  1. using System;
  2. using System.Collections;
  3. using System.Collections.Generic;
  4.  
  5. class SharedEnumerator<T> : IEnumerable<T>
  6. {
  7. 	IEnumerator<T> iter;
  8. 	public SharedEnumerator(IEnumerator<T> iter) { this.iter = iter; }
  9. 	public IEnumerator<T> GetEnumerator() { return iter; }
  10. 	IEnumerator IEnumerable.GetEnumerator() { return iter; }
  11. }
  12.  
  13. public class Test
  14. {
  15. 	static IEnumerable<string> Generate()
  16.     {
  17.         yield return "A";
  18.         yield return "B";
  19.         yield return "C";
  20.     }
  21.  
  22. 	public static void Main()
  23. 	{
  24. 		var shared = new SharedEnumerator<string>(Generate().GetEnumerator());
  25. 	    foreach (var outer in shared)
  26.         {
  27.             Console.WriteLine(outer);
  28.             if (outer == "B")
  29.             {
  30.                 foreach (var inner in shared)
  31.                     Console.WriteLine("    " + inner);
  32.             }
  33.         }
  34. 	}
  35. }
Success #stdin #stdout 0.02s 33776KB
comments (?)
stdin 
Standard input is empty
stdout 
A
B
    C
https://ideone.com/qLVa0D
language:
C# (gmcs 5.20.1)
created:
11 years ago
visibility:
public

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