blob: 13f75138101ec8e25f46e870ff97a32daafee9b7 [file] [log] [blame]
// 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:math";
import "dart:typed_data";
// Equivalent of calling FATAL from C++ code.
_fatal(msg) native "DartCore_fatal";
// The members of this class are cloned and added to each class that
// represents an enum type.
class _EnumHelper {
// Declare the list of enum value names private. When this field is
// cloned into a user-defined enum class, the field will be inaccessible
// because of the library-specific name suffix. The toString() function
// below can access it because it uses the same name suffix.
static const List<String> _enum_names = null;
String toString() => _enum_names[index];
int get hashCode => _enum_names[index].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";
}