| // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| import "dart:async"; |
| import "dart:collection" show LinkedList, LinkedListEntry; |
| import 'dart:convert' show ASCII, JSON; |
| import "dart:isolate"; |
| import "dart:math"; |
| import "dart:typed_data"; |
| import 'dart:_internal' as internal; |
| |
| // The members of this class are cloned and added to each class that |
| // represents an enum type. |
| class _EnumHelper { |
| String _name; |
| String toString() => _name; |
| int get hashCode => _name.hashCode; |
| } |
| |
| // _SyncIterable and _syncIterator are used by the compiler to |
| // implement sync* generator functions. A sync* generator allocates |
| // and returns a new _SyncIterable object. |
| |
| typedef bool _SyncGeneratorCallback(Iterator iterator); |
| |
| class _SyncIterable extends IterableBase { |
| // _moveNextFn is the closurized body of the generator function. |
| final _SyncGeneratorCallback _moveNextFn; |
| |
| const _SyncIterable(this._moveNextFn); |
| |
| get iterator { |
| return new _SyncIterator(_moveNextFn._clone()); |
| } |
| } |
| |
| class _SyncIterator implements Iterator { |
| bool isYieldEach; // Set by generated code for the yield* statement. |
| Iterator yieldEachIterator; |
| var _current; // Set by generated code for the yield and yield* statement. |
| _SyncGeneratorCallback _moveNextFn; |
| |
| get current => |
| yieldEachIterator != null ? yieldEachIterator.current : _current; |
| |
| _SyncIterator(this._moveNextFn); |
| |
| bool moveNext() { |
| if (_moveNextFn == null) { |
| return false; |
| } |
| while (true) { |
| if (yieldEachIterator != null) { |
| if (yieldEachIterator.moveNext()) { |
| return true; |
| } |
| yieldEachIterator = null; |
| } |
| isYieldEach = false; |
| // _moveNextFn() will update the values of isYieldEach and _current. |
| if (!_moveNextFn(this)) { |
| _moveNextFn = null; |
| _current = null; |
| return false; |
| } |
| if (isYieldEach) { |
| // Spec mandates: it is a dynamic error if the class of [the object |
| // returned by yield*] does not implement Iterable. |
| yieldEachIterator = (_current as Iterable).iterator; |
| _current = null; |
| continue; |
| } |
| return true; |
| } |
| } |
| } |
| |
| @patch |
| class StackTrace { |
| @patch |
| static StackTrace get current native "StackTrace_current"; |
| } |