bool
ForOfIterator::next(MutableHandleValue vp, bool* done)
{
MOZ_ASSERT(iterator);
if (index != NOT_ARRAY) {
ForOfPIC::Chain* stubChain = ForOfPIC::getOrCreate(cx_);
if (!stubChain)
return false;
if (stubChain->isArrayNextStillSane())
return nextFromOptimizedArray(vp, done);
// ArrayIterator.prototype.next changed, materialize a proper
// ArrayIterator instance and fall through to slowpath case.
if (!materializeArrayIterator())
return false;
}
RootedValue method(cx_);
if (!GetProperty(cx_, iterator, iterator, cx_->names().next, &method))
return false;
InvokeArgs args(cx_);
if (!args.init(1))
return false;
args.setCallee(method);
args.setThis(ObjectValue(*iterator));
args[0].setUndefined();
if (!Invoke(cx_, args))
return false;
RootedObject resultObj(cx_, ToObject(cx_, args.rval()));
if (!resultObj)
return false;
RootedValue doneVal(cx_);
if (!GetProperty(cx_, resultObj, resultObj, cx_->names().done, &doneVal))
return false;
*done = ToBoolean(doneVal);
if (*done) {
vp.setUndefined();
return true;
}
return GetProperty(cx_, resultObj, resultObj, cx_->names().value, vp);
}
bool
ForOfIterator::next(MutableHandleValue vp, bool* done)
{
MOZ_ASSERT(iterator);
if (index != NOT_ARRAY) {
ForOfPIC::Chain* stubChain = ForOfPIC::getOrCreate(cx_);
if (!stubChain)
return false;
if (stubChain->isArrayNextStillSane())
return nextFromOptimizedArray(vp, done);
// ArrayIterator.prototype.next changed, materialize a proper
// ArrayIterator instance and fall through to slowpath case.
if (!materializeArrayIterator())
return false;
}
RootedValue v(cx_);
if (!GetProperty(cx_, iterator, iterator, cx_->names().next, &v))
return false;
if (!js::Call(cx_, v, iterator, &v))
return false;
if (!v.isObject())
return ThrowCheckIsObject(cx_, CheckIsObjectKind::IteratorNext);
RootedObject resultObj(cx_, &v.toObject());
if (!GetProperty(cx_, resultObj, resultObj, cx_->names().done, &v))
return false;
*done = ToBoolean(v);
if (*done) {
vp.setUndefined();
return true;
}
return GetProperty(cx_, resultObj, resultObj, cx_->names().value, vp);
}