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/src/Boo.Lang/AbstractGeneratorEnumerator.cs

https://github.com/boo/boo-lang
C# | 68 lines | 34 code | 9 blank | 25 comment | 0 complexity | d19a2f7f19d3401468edfb42148ed677 MD5 | raw file
Possible License(s): GPL-2.0
  1. #region license
  2. // Copyright (c) 2004, Rodrigo B. de Oliveira (rbo@acm.org)
  3. // All rights reserved.
  4. //
  5. // Redistribution and use in source and binary forms, with or without modification,
  6. // are permitted provided that the following conditions are met:
  7. //
  8. // * Redistributions of source code must retain the above copyright notice,
  9. // this list of conditions and the following disclaimer.
  10. // * Redistributions in binary form must reproduce the above copyright notice,
  11. // this list of conditions and the following disclaimer in the documentation
  12. // and/or other materials provided with the distribution.
  13. // * Neither the name of Rodrigo B. de Oliveira nor the names of its
  14. // contributors may be used to endorse or promote products derived from this
  15. // software without specific prior written permission.
  16. //
  17. // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
  18. // ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  19. // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  20. // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
  21. // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22. // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  23. // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  24. // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  25. // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26. // THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27. #endregion
  28. namespace Boo.Lang
  29. {
  30. using System;
  31. using System.Collections;
  32. public abstract class AbstractGeneratorEnumerator : IEnumerator
  33. {
  34. protected object _current;
  35. protected int _state;
  36. public AbstractGeneratorEnumerator()
  37. {
  38. _state = 0;
  39. }
  40. public object Current
  41. {
  42. get
  43. {
  44. return _current;
  45. }
  46. }
  47. public void Reset()
  48. {
  49. _state = 0;
  50. }
  51. public abstract bool MoveNext();
  52. protected bool Yield(int state, object value)
  53. {
  54. _state = state;
  55. _current = value;
  56. return true;
  57. }
  58. }
  59. }