| /* |
| * Copyright (C) 2014, 2016 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS |
| * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
| * THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| function catch(onRejected) |
| { |
| "use strict"; |
| |
| return this.then(@undefined, onRejected); |
| } |
| |
| function then(onFulfilled, onRejected) |
| { |
| "use strict"; |
| |
| if (!@isPromise(this)) |
| @throwTypeError("|this| is not a Promise"); |
| |
| var constructor = @speciesConstructor(this, @Promise); |
| |
| var promise; |
| var promiseOrCapability; |
| if (constructor === @Promise) { |
| promiseOrCapability = @newPromise(); |
| promise = promiseOrCapability; |
| } else { |
| promiseOrCapability = @newPromiseCapabilitySlow(constructor); |
| promise = promiseOrCapability.@promise; |
| } |
| |
| if (typeof onFulfilled !== "function") |
| onFulfilled = function (argument) { return argument; }; |
| |
| if (typeof onRejected !== "function") |
| onRejected = function (argument) { throw argument; }; |
| |
| var reaction = @newPromiseReaction(promiseOrCapability, onFulfilled, onRejected); |
| |
| var flags = @getPromiseInternalField(this, @promiseFieldFlags); |
| var state = flags & @promiseStateMask; |
| if (state === @promiseStatePending) { |
| reaction.@next = @getPromiseInternalField(this, @promiseFieldReactionsOrResult); |
| @putPromiseInternalField(this, @promiseFieldReactionsOrResult, reaction); |
| } else { |
| if (state === @promiseStateRejected && !(flags & @promiseFlagsIsHandled)) |
| @hostPromiseRejectionTracker(this, @promiseRejectionHandle); |
| @enqueueJob(@promiseReactionJob, state, reaction, @getPromiseInternalField(this, @promiseFieldReactionsOrResult)); |
| } |
| @putPromiseInternalField(this, @promiseFieldFlags, @getPromiseInternalField(this, @promiseFieldFlags) | @promiseFlagsIsHandled); |
| |
| return promise; |
| } |
| |
| function finally(onFinally) |
| { |
| "use strict"; |
| |
| if (!@isObject(this)) |
| @throwTypeError("|this| is not an object"); |
| |
| const constructor = @speciesConstructor(this, @Promise); |
| |
| @assert(@isConstructor(constructor)); |
| |
| let thenFinally; |
| let catchFinally; |
| |
| if (typeof onFinally !== "function") { |
| thenFinally = onFinally; |
| catchFinally = onFinally; |
| } else { |
| thenFinally = @getThenFinally(onFinally, constructor); |
| catchFinally = @getCatchFinally(onFinally, constructor); |
| } |
| |
| return this.then(thenFinally, catchFinally); |
| } |
| |
| @globalPrivate |
| function getThenFinally(onFinally, constructor) |
| { |
| "use strict"; |
| |
| return function(value) |
| { |
| @assert(typeof onFinally === "function"); |
| const result = onFinally(); |
| |
| @assert(@isConstructor(constructor)); |
| const resultCapability = @newPromiseCapability(constructor); |
| |
| resultCapability.@resolve.@call(@undefined, result); |
| |
| const promise = resultCapability.@promise; |
| const valueThunk = function () { return value; }; |
| |
| return promise.then(valueThunk); |
| } |
| } |
| |
| @globalPrivate |
| function getCatchFinally(onFinally, constructor) |
| { |
| "use strict"; |
| |
| return function(reason) |
| { |
| @assert(typeof onFinally === "function"); |
| const result = onFinally(); |
| |
| @assert(@isConstructor(constructor)); |
| const resultCapability = @newPromiseCapability(constructor); |
| |
| resultCapability.@resolve.@call(@undefined, result); |
| |
| const promise = resultCapability.@promise; |
| const thrower = function () { throw reason; }; |
| |
| return promise.then(thrower); |
| } |
| } |