“LifeAfterYield” (Solution)

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Answer
1
BarBaz
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Explanation
The code from the problem will be transformed in the following code (some part of the code specifically removed for better understanding):
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private sealed class FooEnumerable : 
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    IEnumerable<string>, IEnumerator<string>
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{
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  private int state;
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  public string Current { get; private set; }
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​
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  object IEnumerator.Current
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  {
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    get { return Current; }
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  }
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​
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  public FooEnumerable(int state)
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  {
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    this.state = state;
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  }
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​
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  public IEnumerator<string> GetEnumerator()
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  {
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    FooEnumerable fooEnumerable;
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    if (state == -2)
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    {
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      state = 0;
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      fooEnumerable = this;
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    }
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    else
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      fooEnumerable = new FooEnumerable(0);
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    return fooEnumerable;
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  }
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​
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  IEnumerator IEnumerable.GetEnumerator()
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  {
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    return GetEnumerator();
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  }
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​
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  bool IEnumerator.MoveNext()
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  {
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    switch (state)
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    {
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      case 0:
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        Current = "Bar";
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        state = 1;
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        return true;
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      case 1:
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        state = -1;
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        Console.WriteLine("Baz");
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        break;
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    }
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    return false;
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  }
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​
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  void IEnumerator.Reset()
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  {
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    throw new NotSupportedException();
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  }
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​
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  void IDisposable.Dispose()
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  {
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  }
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}
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​
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IEnumerable<string> Foo()
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{
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  return new FooEnumerable(-2);
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}
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​
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void Main()
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{
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  var enumerator = Foo().GetEnumerator();
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  while (enumerator.MoveNext())
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    Console.Write(enumerator.Current);
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}
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“QueryWithInc” (Problem)

“LifeAfterYield” (Problem)

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