| /* |
| * Copyright (C) 2017 Oleksandr Skachkov <gskachkov@gmail.com>. |
| * |
| * 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. ``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 |
| * 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 next(value) |
| { |
| "use strict"; |
| |
| const promiseCapability = @newPromiseCapability(@Promise); |
| |
| if (!@isObject(this) || !@isObject(@getByIdDirectPrivate(this, "syncIterator"))) { |
| promiseCapability.@reject.@call(@undefined, @makeTypeError('Iterator is not an object.')); |
| return promiseCapability.@promise; |
| } |
| |
| const syncIterator = @getByIdDirectPrivate(this, "syncIterator"); |
| |
| try { |
| const { value: nextValue, done: nextDone } = @getByIdDirectPrivate(this, "nextMethod").@call(syncIterator, value); |
| const valueWrapperCapability = @newPromiseCapability(@Promise); |
| valueWrapperCapability.@resolve.@call(@undefined, nextValue); |
| valueWrapperCapability.@promise.@then( |
| function (result) { promiseCapability.@resolve.@call(@undefined, { value: result, done: !!nextDone }); }, |
| function (error) { promiseCapability.@reject.@call(@undefined, error); }); |
| } catch(e) { |
| promiseCapability.@reject.@call(@undefined, e); |
| } |
| |
| return promiseCapability.@promise; |
| } |
| |
| function return(value) |
| { |
| "use strict"; |
| |
| const promiseCapability = @newPromiseCapability(@Promise); |
| |
| if (!@isObject(this) || !@isObject(@getByIdDirectPrivate(this, "syncIterator"))) { |
| promiseCapability.@reject.@call(@undefined, @makeTypeError('Iterator is not an object.')); |
| return promiseCapability.@promise; |
| } |
| |
| const syncIterator = @getByIdDirectPrivate(this, "syncIterator"); |
| |
| let returnMethod; |
| |
| try { |
| returnMethod = syncIterator.return; |
| } catch (e) { |
| promiseCapability.@reject.@call(@undefined, e); |
| return promiseCapability.@promise; |
| } |
| |
| if (returnMethod === @undefined) { |
| promiseCapability.@resolve.@call(@undefined, { value, done: true }); |
| return promiseCapability.@promise; |
| } |
| |
| try { |
| const returnResult = returnMethod.@call(syncIterator, value); |
| |
| if (!@isObject(returnResult)) { |
| promiseCapability.@reject.@call(@undefined, @makeTypeError('Iterator result interface is not an object.')); |
| return promiseCapability.@promise; |
| } |
| |
| const { value: resultValue, done: resultDone } = returnResult; |
| const valueWrapperCapability = @newPromiseCapability(@Promise); |
| |
| valueWrapperCapability.@resolve.@call(@undefined, resultValue); |
| valueWrapperCapability.@promise.@then( |
| function (result) { promiseCapability.@resolve.@call(@undefined, { value: result, done: resultDone }); }, |
| function (error) { promiseCapability.@reject.@call(@undefined, error); }); |
| } catch (e) { |
| promiseCapability.@reject.@call(@undefined, e); |
| } |
| |
| return promiseCapability.@promise; |
| } |
| |
| function throw(exception) |
| { |
| "use strict"; |
| |
| const promiseCapability = @newPromiseCapability(@Promise); |
| |
| if (!@isObject(this) || !@isObject(@getByIdDirectPrivate(this, "syncIterator"))) { |
| promiseCapability.@reject.@call(@undefined, @makeTypeError('Iterator is not an object.')); |
| return promiseCapability.@promise; |
| } |
| |
| const syncIterator = @getByIdDirectPrivate(this, "syncIterator"); |
| |
| let throwMethod; |
| |
| try { |
| throwMethod = syncIterator.throw; |
| } catch (e) { |
| promiseCapability.@reject.@call(@undefined, e); |
| return promiseCapability.@promise; |
| } |
| |
| if (throwMethod === @undefined) { |
| promiseCapability.@reject.@call(@undefined, exception); |
| return promiseCapability.@promise; |
| } |
| |
| try { |
| const throwResult = throwMethod.@call(syncIterator, exception); |
| |
| if (!@isObject(throwResult)) { |
| promiseCapability.@reject.@call(@undefined, @makeTypeError('Iterator result interface is not an object.')); |
| return promiseCapability.@promise; |
| } |
| |
| const { value: throwValue, done: throwDone } = throwResult; |
| const valueWrapperCapability = @newPromiseCapability(@Promise); |
| |
| valueWrapperCapability.@resolve.@call(@undefined, throwValue); |
| valueWrapperCapability.@promise.@then( |
| function (result) { promiseCapability.@resolve.@call(@undefined, { value: result, done: throwDone }); }, |
| function (error) { promiseCapability.@reject.@call(@undefined, error); }); |
| } catch (e) { |
| promiseCapability.@reject.@call(@undefined, e); |
| } |
| |
| return promiseCapability.@promise; |
| } |
| |
| @globalPrivate |
| function createAsyncFromSyncIterator(syncIterator, nextMethod) |
| { |
| "use strict"; |
| |
| if (!@isObject(syncIterator)) |
| @throwTypeError('Only objects can be wrapped by async-from-sync wrapper'); |
| |
| return new @AsyncFromSyncIterator(syncIterator, nextMethod); |
| } |
| |
| @globalPrivate |
| @constructor |
| function AsyncFromSyncIterator(syncIterator, nextMethod) |
| { |
| "use strict"; |
| |
| @putByIdDirectPrivate(this, "syncIterator", syncIterator); |
| @putByIdDirectPrivate(this, "nextMethod", nextMethod); |
| } |