| /* |
| * Copyright (C) 2015 Yusuke Suzuki <utatane.tea@gmail.com>. |
| * Copyright (C) 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. ``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() |
| { |
| "use strict"; |
| |
| if (!@isArrayIterator(this)) |
| @throwTypeError("%ArrayIteratorPrototype%.next requires that |this| be an Array Iterator instance"); |
| |
| var array = @getArrayIteratorInternalField(this, @arrayIteratorFieldIteratedObject); |
| var kind = @getArrayIteratorInternalField(this, @arrayIteratorFieldKind); |
| return @arrayIteratorNextHelper.@call(this, array, kind); |
| } |
| |
| // FIXME: We have to have this because we can't implement this all as one function and meet our inlining heuristics. |
| // Collectively, next and this have ~130 bytes of bytecodes but our limit is 120. |
| @globalPrivate |
| function arrayIteratorNextHelper(array, kind) |
| { |
| "use strict"; |
| var done = true; |
| var value; |
| |
| var index = @getArrayIteratorInternalField(this, @arrayIteratorFieldIndex); |
| if (index !== -1) { |
| var length = array.length >>> 0; |
| if (index < length) { |
| @putArrayIteratorInternalField(this, @arrayIteratorFieldIndex, index + 1); |
| done = false; |
| if (kind === @iterationKindKey) |
| value = index; |
| else { |
| value = array[index]; |
| if (kind === @iterationKindEntries) |
| value = [index, value]; |
| } |
| } else |
| @putArrayIteratorInternalField(this, @arrayIteratorFieldIndex, -1); |
| } |
| |
| return { value, done }; |
| } |