异常: 传递流程

基于上述注释观察并理解异常传递流程：

  1. <?php
  3. function g1()
  4. {
  5.     throw new \Exception();
  6.     yield;
  7. }
  8. // a2 -> b2 ->
  9. (new AsyncTask(g1()))->begin();
  12. function g2()
  13. {
  14.     yield;
  15.     throw new \Exception();
  16. }
  17. // a2 (-> a4 -> a2) -> b2 -> b2 ->
  18. (new AsyncTask(g2()))->begin();
  21. function g3()
  22. {
  23.     yield;
  24.     throw new \Exception();
  25. }
  26. // a2 (-> a4 -> a2) -> b2 -> b2 ->
  27. (new AsyncTask(g3()))->begin();
  30. function g4()
  31. {
  32.     yield;
  33.     yield;
  34.     throw new \Exception();
  35. }
  36. // a2 (-> a4 -> a2) (-> a4 -> a2) -> b2 -> b2 -> b2 ->
  37. (new AsyncTask(g4()))->begin();
  40. function g5()
  41. {
  42.     throw new \Exception();
  43.     /** @noinspection PhpUnreachableStatementInspection */
  44.     yield;
  45. }
  46. function g7()
  47. {
  48.     yield g5();
  49. }
  50. // (a2 -> a3) -> a2 (-> b2 -> b1 -> c) -> b2 ->
  51. (new AsyncTask(g7()))->begin();
  54. function g6()
  55. {
  56.     yield;
  57.     throw new \Exception();
  58. }
  59. function g8()
  60. {
  61.     yield g6();
  62. }
  63. // (a2 -> a3) -> a2 -> a4 -> a2 -> b2 -> b2 -> b1 -> c -> b2 ->
  64. (new AsyncTask(g8()))->begin();
  67. function g9()
  68. {
  69.     try {
  70.         yield g5();
  71.     } catch (\Exception $ex) {
  73.     }
  74. }
  75. // a2 -> a3 -> a2 -> b2 -> b1 -> c ->
  76. (new AsyncTask(g9()))->begin();