Behind the scenes of the C# yield keyword（转）

https://startbigthinksmall.wordpress.com/2008/06/09/behind-the-scenes-of-the-c-yield-keyword/

Behind the scenes of the C# yield keyword

June 9, 2008 by Lars Corneliussen

Each enumerator holds a state indicating:

• -2: Initialized as Enumerable. (Not yet an Enumerator)
• -1: Closed
• 0: Initialized as Enumerator.  

  private bool MoveNext(){  try  {    switch (state)    {      case 0:        state = -1;        state = 1;        this.values = new int[] { 1, 2, 3, 5, 8 };        this.currentPositionInValues = 0;        while (this.currentPositionInValues < this.values.Length)        {          current_i = this.values[this.currentPositionInValues];          current = current_i;          state = 2;          return true;        Label_007F:          state = 1;          this.currentPositionInValues++;        }        this.Finally2();        break;      case 2:        goto Label_007F;    }    return false;  }  fault  {    this.System.IDisposable.Dispose();  }}[/sourcecode]

   

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  原标题：Behind the scenes of the C# yield keyword（转）

  关键词：C#