本文整理汇总了C++中HandleArrayObject::lastProperty方法的典型用法代码示例。如果您正苦于以下问题：C++ HandleArrayObject::lastProperty方法的具体用法？C++ HandleArrayObject::lastProperty怎么用？C++ HandleArrayObject::lastProperty使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类HandleArrayObject的用法示例。
在下文中一共展示了HandleArrayObject::lastProperty方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: shape
bool
js::ForOfPIC::Chain::tryOptimizeArray(JSContext *cx, HandleArrayObject array, bool *optimized)
{
MOZ_ASSERT(optimized);
*optimized = false;
if (!initialized_) {
// If PIC is not initialized, initialize it.
if (!initialize(cx))
return false;
} else if (!disabled_ && !isArrayStateStillSane()) {
// Otherwise, if array state is no longer sane, reinitialize.
reset(cx);
if (!initialize(cx))
return false;
}
MOZ_ASSERT(initialized_);
// If PIC is disabled, don't bother trying to optimize.
if (disabled_)
return true;
// By the time we get here, we should have a sane array state to work with.
MOZ_ASSERT(isArrayStateStillSane());
// Check if stub already exists.
ForOfPIC::Stub *stub = isArrayOptimized(&array->as<ArrayObject>());
if (stub) {
*optimized = true;
return true;
}
// If the number of stubs is about to exceed the limit, throw away entire
// existing cache before adding new stubs. We shouldn't really have heavy
// churn on these.
if (numStubs() >= MAX_STUBS)
eraseChain();
// Ensure array's prototype is the actual Array.prototype
if (!isOptimizableArray(array))
return true;
// Ensure array doesn't define '@@iterator' directly.
if (array->lookup(cx, cx->names().std_iterator))
return true;
// Good to optimize now, create stub to add.
RootedShape shape(cx, array->lastProperty());
stub = cx->new_<Stub>(shape);
if (!stub)
return false;
// Add the stub.
addStub(stub);
*optimized = true;
return true;
}