Version 1

[yaffs-website] / node_modules / babel-runtime / helpers / asyncGenerator.js

diff --git a/node_modules/babel-runtime/helpers/asyncGenerator.js b/node_modules/babel-runtime/helpers/asyncGenerator.js
new file mode 100644 (file)
index 0000000..ebbea09
--- /dev/null
+++ b/node_modules/babel-runtime/helpers/asyncGenerator.js
@@ -0,0 +1,126 @@
+"use strict";
+
+exports.__esModule = true;
+
+var _symbol = require("../core-js/symbol");
+
+var _symbol2 = _interopRequireDefault(_symbol);
+
+var _promise = require("../core-js/promise");
+
+var _promise2 = _interopRequireDefault(_promise);
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+exports.default = function () {
+  function AwaitValue(value) {
+    this.value = value;
+  }
+
+  function AsyncGenerator(gen) {
+    var front, back;
+
+    function send(key, arg) {
+      return new _promise2.default(function (resolve, reject) {
+        var request = {
+          key: key,
+          arg: arg,
+          resolve: resolve,
+          reject: reject,
+          next: null
+        };
+
+        if (back) {
+          back = back.next = request;
+        } else {
+          front = back = request;
+          resume(key, arg);
+        }
+      });
+    }
+
+    function resume(key, arg) {
+      try {
+        var result = gen[key](arg);
+        var value = result.value;
+
+        if (value instanceof AwaitValue) {
+          _promise2.default.resolve(value.value).then(function (arg) {
+            resume("next", arg);
+          }, function (arg) {
+            resume("throw", arg);
+          });
+        } else {
+          settle(result.done ? "return" : "normal", result.value);
+        }
+      } catch (err) {
+        settle("throw", err);
+      }
+    }
+
+    function settle(type, value) {
+      switch (type) {
+        case "return":
+          front.resolve({
+            value: value,
+            done: true
+          });
+          break;
+
+        case "throw":
+          front.reject(value);
+          break;
+
+        default:
+          front.resolve({
+            value: value,
+            done: false
+          });
+          break;
+      }
+
+      front = front.next;
+
+      if (front) {
+        resume(front.key, front.arg);
+      } else {
+        back = null;
+      }
+    }
+
+    this._invoke = send;
+
+    if (typeof gen.return !== "function") {
+      this.return = undefined;
+    }
+  }
+
+  if (typeof _symbol2.default === "function" && _symbol2.default.asyncIterator) {
+    AsyncGenerator.prototype[_symbol2.default.asyncIterator] = function () {
+      return this;
+    };
+  }
+
+  AsyncGenerator.prototype.next = function (arg) {
+    return this._invoke("next", arg);
+  };
+
+  AsyncGenerator.prototype.throw = function (arg) {
+    return this._invoke("throw", arg);
+  };
+
+  AsyncGenerator.prototype.return = function (arg) {
+    return this._invoke("return", arg);
+  };
+
+  return {
+    wrap: function wrap(fn) {
+      return function () {
+        return new AsyncGenerator(fn.apply(this, arguments));
+      };
+    },
+    await: function await(value) {
+      return new AwaitValue(value);
+    }
+  };
+}();
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