async.js 2.7 KB

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  1. "use strict";
  2. Object.defineProperty(exports, "__esModule", {
  3. value: true
  4. });
  5. exports.forwardAsync = forwardAsync;
  6. exports.isAsync = void 0;
  7. exports.isThenable = isThenable;
  8. exports.maybeAsync = maybeAsync;
  9. exports.waitFor = exports.onFirstPause = void 0;
  10. function _gensync() {
  11. const data = require("gensync");
  12. _gensync = function () {
  13. return data;
  14. };
  15. return data;
  16. }
  17. function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) { try { var info = gen[key](arg); var value = info.value; } catch (error) { reject(error); return; } if (info.done) { resolve(value); } else { Promise.resolve(value).then(_next, _throw); } }
  18. function _asyncToGenerator(fn) { return function () { var self = this, args = arguments; return new Promise(function (resolve, reject) { var gen = fn.apply(self, args); function _next(value) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "next", value); } function _throw(err) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "throw", err); } _next(undefined); }); }; }
  19. const runGenerator = _gensync()(function* (item) {
  20. return yield* item;
  21. });
  22. const isAsync = _gensync()({
  23. sync: () => false,
  24. errback: cb => cb(null, true)
  25. });
  26. exports.isAsync = isAsync;
  27. function maybeAsync(fn, message) {
  28. return _gensync()({
  29. sync(...args) {
  30. const result = fn.apply(this, args);
  31. if (isThenable(result)) throw new Error(message);
  32. return result;
  33. },
  34. async(...args) {
  35. return Promise.resolve(fn.apply(this, args));
  36. }
  37. });
  38. }
  39. const withKind = _gensync()({
  40. sync: cb => cb("sync"),
  41. async: function () {
  42. var _ref = _asyncToGenerator(function* (cb) {
  43. return cb("async");
  44. });
  45. return function async(_x) {
  46. return _ref.apply(this, arguments);
  47. };
  48. }()
  49. });
  50. function forwardAsync(action, cb) {
  51. const g = _gensync()(action);
  52. return withKind(kind => {
  53. const adapted = g[kind];
  54. return cb(adapted);
  55. });
  56. }
  57. const onFirstPause = _gensync()({
  58. name: "onFirstPause",
  59. arity: 2,
  60. sync: function (item) {
  61. return runGenerator.sync(item);
  62. },
  63. errback: function (item, firstPause, cb) {
  64. let completed = false;
  65. runGenerator.errback(item, (err, value) => {
  66. completed = true;
  67. cb(err, value);
  68. });
  69. if (!completed) {
  70. firstPause();
  71. }
  72. }
  73. });
  74. exports.onFirstPause = onFirstPause;
  75. const waitFor = _gensync()({
  76. sync: x => x,
  77. async: function () {
  78. var _ref2 = _asyncToGenerator(function* (x) {
  79. return x;
  80. });
  81. return function async(_x2) {
  82. return _ref2.apply(this, arguments);
  83. };
  84. }()
  85. });
  86. exports.waitFor = waitFor;
  87. function isThenable(val) {
  88. return !!val && (typeof val === "object" || typeof val === "function") && !!val.then && typeof val.then === "function";
  89. }
  90. 0 && 0;
  91. //# sourceMappingURL=async.js.map