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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
function IteratorIdentity() {
return this;
}
var LegacyIteratorWrapperMap = new std_WeakMap();
function LegacyIteratorNext(arg) {
var iter = callFunction(std_WeakMap_get, LegacyIteratorWrapperMap, this);
try {
return { value: callContentFunction(iter.next, iter, arg), done: false };
} catch (e) {
if (e instanceof std_StopIteration)
return { value: undefined, done: true };
throw e;
}
}
function LegacyIteratorThrow(exn) {
var iter = callFunction(std_WeakMap_get, LegacyIteratorWrapperMap, this);
try {
return { value: callContentFunction(iter.throw, iter, exn), done: false };
} catch (e) {
if (e instanceof std_StopIteration)
return { value: undefined, done: true };
throw e;
}
}
function LegacyIterator(iter) {
callFunction(std_WeakMap_set, LegacyIteratorWrapperMap, this, iter);
}
function LegacyGeneratorIterator(iter) {
callFunction(std_WeakMap_set, LegacyIteratorWrapperMap, this, iter);
}
var LegacyIteratorsInitialized = std_Object_create(null);
function InitLegacyIterators() {
var props = std_Object_create(null);
props.next = std_Object_create(null);
props.next.value = LegacyIteratorNext;
props.next.enumerable = false;
props.next.configurable = true;
props.next.writable = true;
props[std_iterator] = std_Object_create(null);
props[std_iterator].value = IteratorIdentity;
props[std_iterator].enumerable = false;
props[std_iterator].configurable = true;
props[std_iterator].writable = true;
var LegacyIteratorProto = std_Object_create(GetIteratorPrototype(), props);
MakeConstructible(LegacyIterator, LegacyIteratorProto);
props.throw = std_Object_create(null);
props.throw.value = LegacyIteratorThrow;
props.throw.enumerable = false;
props.throw.configurable = true;
props.throw.writable = true;
var LegacyGeneratorIteratorProto = std_Object_create(GetIteratorPrototype(), props);
MakeConstructible(LegacyGeneratorIterator, LegacyGeneratorIteratorProto);
LegacyIteratorsInitialized.initialized = true;
}
function NewLegacyIterator(iter, wrapper) {
if (!LegacyIteratorsInitialized.initialized)
InitLegacyIterators();
return new wrapper(iter);
}
function LegacyIteratorShim() {
return NewLegacyIterator(ToObject(this), LegacyIterator);
}
function LegacyGeneratorIteratorShim() {
return NewLegacyIterator(ToObject(this), LegacyGeneratorIterator);
}
// 7.4.8 CreateListIterator()
function CreateListIterator(array) {
let iterator = NewListIterator();
UnsafeSetReservedSlot(iterator, ITERATOR_SLOT_TARGET, array);
UnsafeSetReservedSlot(iterator, ITERATOR_SLOT_NEXT_INDEX, 0);
// 7.4.8.1 ListIterator next()
// The spec requires that we use a new next function per iterator object.
let next = function() {
if (!IsObject(this) || !IsListIterator(this))
return callFunction(CallListIteratorMethodIfWrapped, this, "ListIteratorNext");
if (ActiveFunction() !== UnsafeGetReservedSlot(this, ITERATOR_SLOT_NEXT_METHOD))
ThrowTypeError(JSMSG_INCOMPATIBLE_METHOD, "next", "method", ToString(this));
let array = UnsafeGetObjectFromReservedSlot(this, ITERATOR_SLOT_TARGET);
let index = UnsafeGetReservedSlot(this, ITERATOR_SLOT_NEXT_INDEX);
if (index >= ToLength(array.length)) {
UnsafeSetReservedSlot(this, ITERATOR_SLOT_NEXT_INDEX, 1/0);
return { value: undefined, done: true };
}
UnsafeSetReservedSlot(this, ITERATOR_SLOT_NEXT_INDEX, index + 1);
return { value: array[index], done: false };
};
UnsafeSetReservedSlot(iterator, ITERATOR_SLOT_NEXT_METHOD, next);
iterator.next = next;
iterator[std_iterator] = ListIteratorIdentity;
return iterator;
}
function ListIteratorIdentity() {
if (!IsObject(this) || !IsListIterator(this))
return callFunction(CallListIteratorMethodIfWrapped, this, "ListIteratorIdentity");
return this;
}
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