本文整理汇总了C++中PropertyValue::DestroyValueFor方法的典型用法代码示例。如果您正苦于以下问题：C++ PropertyValue::DestroyValueFor方法的具体用法？C++ PropertyValue::DestroyValueFor怎么用？C++ PropertyValue::DestroyValueFor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PropertyValue的用法示例。
在下文中一共展示了PropertyValue::DestroyValueFor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: sizeof
void
FramePropertyTable::Set(nsIFrame* aFrame, const FramePropertyDescriptor* aProperty,
void* aValue)
{
NS_ASSERTION(aFrame, "Null frame?");
NS_ASSERTION(aProperty, "Null property?");
if (mLastFrame != aFrame || !mLastEntry) {
mLastFrame = aFrame;
mLastEntry = mEntries.PutEntry(aFrame);
}
Entry* entry = mLastEntry;
if (!entry->mProp.IsArray()) {
if (!entry->mProp.mProperty) {
// Empty entry, so we can just store our property in the empty slot
entry->mProp.mProperty = aProperty;
entry->mProp.mValue = aValue;
return;
}
if (entry->mProp.mProperty == aProperty) {
// Just overwrite the current value
entry->mProp.DestroyValueFor(aFrame);
entry->mProp.mValue = aValue;
return;
}
// We need to expand the single current entry to an array
PropertyValue current = entry->mProp;
entry->mProp.mProperty = nullptr;
static_assert(sizeof(nsTArray<PropertyValue>) <= sizeof(void *),
"Property array must fit entirely within entry->mProp.mValue");
new (&entry->mProp.mValue) nsTArray<PropertyValue>(4);
entry->mProp.ToArray()->AppendElement(current);
}
nsTArray<PropertyValue>* array = entry->mProp.ToArray();
nsTArray<PropertyValue>::index_type index =
array->IndexOf(aProperty, 0, PropertyComparator());
if (index != nsTArray<PropertyValue>::NoIndex) {
PropertyValue* pv = &array->ElementAt(index);
pv->DestroyValueFor(aFrame);
pv->mValue = aValue;
return;
}
array->AppendElement(PropertyValue(aProperty, aValue));
}