You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
64 lines
2.0 KiB
64 lines
2.0 KiB
var OverloadYield = require("./OverloadYield.js");
|
|
function AsyncGenerator(gen) {
|
|
var front, back;
|
|
function resume(key, arg) {
|
|
try {
|
|
var result = gen[key](arg),
|
|
value = result.value,
|
|
overloaded = value instanceof OverloadYield;
|
|
Promise.resolve(overloaded ? value.v : value).then(function (arg) {
|
|
if (overloaded) {
|
|
var nextKey = "return" === key ? "return" : "next";
|
|
if (!value.k || arg.done) return resume(nextKey, arg);
|
|
arg = gen[nextKey](arg).value;
|
|
}
|
|
settle(result.done ? "return" : "normal", arg);
|
|
}, function (err) {
|
|
resume("throw", err);
|
|
});
|
|
} catch (err) {
|
|
settle("throw", err);
|
|
}
|
|
}
|
|
function settle(type, value) {
|
|
switch (type) {
|
|
case "return":
|
|
front.resolve({
|
|
value: value,
|
|
done: !0
|
|
});
|
|
break;
|
|
case "throw":
|
|
front.reject(value);
|
|
break;
|
|
default:
|
|
front.resolve({
|
|
value: value,
|
|
done: !1
|
|
});
|
|
}
|
|
(front = front.next) ? resume(front.key, front.arg) : back = null;
|
|
}
|
|
this._invoke = function (key, arg) {
|
|
return new Promise(function (resolve, reject) {
|
|
var request = {
|
|
key: key,
|
|
arg: arg,
|
|
resolve: resolve,
|
|
reject: reject,
|
|
next: null
|
|
};
|
|
back ? back = back.next = request : (front = back = request, resume(key, arg));
|
|
});
|
|
}, "function" != typeof gen["return"] && (this["return"] = void 0);
|
|
}
|
|
AsyncGenerator.prototype["function" == typeof Symbol && Symbol.asyncIterator || "@@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);
|
|
};
|
|
module.exports = AsyncGenerator, module.exports.__esModule = true, module.exports["default"] = module.exports;
|