149 lines
6.9 KiB
JavaScript
149 lines
6.9 KiB
JavaScript
"use strict";
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module.exports =
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function(Promise, PromiseArray, tryConvertToPromise, INTERNAL) {
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var util = require("./util");
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var canEvaluate = util.canEvaluate;
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var tryCatch = util.tryCatch;
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var errorObj = util.errorObj;
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var reject;
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if (!false) {
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if (canEvaluate) {
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var thenCallback = function(i) {
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return new Function("value", "holder", " \n\
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'use strict'; \n\
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holder.pIndex = value; \n\
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holder.checkFulfillment(this); \n\
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".replace(/Index/g, i));
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};
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var promiseSetter = function(i) {
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return new Function("promise", "holder", " \n\
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'use strict'; \n\
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holder.pIndex = promise; \n\
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".replace(/Index/g, i));
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};
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var generateHolderClass = function(total) {
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var props = new Array(total);
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for (var i = 0; i < props.length; ++i) {
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props[i] = "this.p" + (i+1);
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}
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var assignment = props.join(" = ") + " = null;";
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var cancellationCode= "var promise;\n" + props.map(function(prop) {
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return " \n\
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promise = " + prop + "; \n\
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if (promise instanceof Promise) { \n\
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promise.cancel(); \n\
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} \n\
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";
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}).join("\n");
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var passedArguments = props.join(", ");
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var name = "Holder$" + total;
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var code = "return function(tryCatch, errorObj, Promise) { \n\
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'use strict'; \n\
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function [TheName](fn) { \n\
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[TheProperties] \n\
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this.fn = fn; \n\
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this.now = 0; \n\
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} \n\
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[TheName].prototype.checkFulfillment = function(promise) { \n\
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var now = ++this.now; \n\
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if (now === [TheTotal]) { \n\
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promise._pushContext(); \n\
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var callback = this.fn; \n\
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var ret = tryCatch(callback)([ThePassedArguments]); \n\
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promise._popContext(); \n\
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if (ret === errorObj) { \n\
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promise._rejectCallback(ret.e, false); \n\
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} else { \n\
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promise._resolveCallback(ret); \n\
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} \n\
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} \n\
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}; \n\
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\n\
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[TheName].prototype._resultCancelled = function() { \n\
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[CancellationCode] \n\
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}; \n\
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\n\
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return [TheName]; \n\
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}(tryCatch, errorObj, Promise); \n\
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";
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code = code.replace(/\[TheName\]/g, name)
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.replace(/\[TheTotal\]/g, total)
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.replace(/\[ThePassedArguments\]/g, passedArguments)
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.replace(/\[TheProperties\]/g, assignment)
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.replace(/\[CancellationCode\]/g, cancellationCode);
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return new Function("tryCatch", "errorObj", "Promise", code)
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(tryCatch, errorObj, Promise);
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};
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var holderClasses = [];
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var thenCallbacks = [];
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var promiseSetters = [];
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for (var i = 0; i < 8; ++i) {
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holderClasses.push(generateHolderClass(i + 1));
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thenCallbacks.push(thenCallback(i + 1));
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promiseSetters.push(promiseSetter(i + 1));
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}
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reject = function (reason) {
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this._reject(reason);
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};
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}}
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Promise.join = function () {
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var last = arguments.length - 1;
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var fn;
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if (last > 0 && typeof arguments[last] === "function") {
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fn = arguments[last];
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if (!false) {
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if (last <= 8 && canEvaluate) {
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var ret = new Promise(INTERNAL);
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ret._captureStackTrace();
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var HolderClass = holderClasses[last - 1];
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var holder = new HolderClass(fn);
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var callbacks = thenCallbacks;
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for (var i = 0; i < last; ++i) {
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var maybePromise = tryConvertToPromise(arguments[i], ret);
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if (maybePromise instanceof Promise) {
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maybePromise = maybePromise._target();
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var bitField = maybePromise._bitField;
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;
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if (((bitField & 50397184) === 0)) {
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maybePromise._then(callbacks[i], reject,
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undefined, ret, holder);
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promiseSetters[i](maybePromise, holder);
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} else if (((bitField & 33554432) !== 0)) {
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callbacks[i].call(ret,
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maybePromise._value(), holder);
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} else if (((bitField & 16777216) !== 0)) {
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ret._reject(maybePromise._reason());
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} else {
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ret._cancel();
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}
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} else {
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callbacks[i].call(ret, maybePromise, holder);
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}
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}
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if (!ret._isFateSealed()) {
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ret._setAsyncGuaranteed();
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ret._setOnCancel(holder);
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}
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return ret;
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}
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}
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}
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var $_len = arguments.length;var args = new Array($_len); for(var $_i = 0; $_i < $_len; ++$_i) {args[$_i] = arguments[$_i];};
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if (fn) args.pop();
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var ret = new PromiseArray(args).promise();
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return fn !== undefined ? ret.spread(fn) : ret;
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};
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};
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