* Replace `QueryListenOptions` with simple booleans
Instead of calling
addSnapshotListener(
options:QueryListenOptions.includeQueryMetadataChanges()
.includeDocumentMetadataChanges())
call
addSnapshotListener(includeMetadataChanges:true)
Also change `QuerySnapshot.documentChanges()` into a method which
optionally takes `includeMetadataChanges:true`. By default even when
listening to a query with `inlcudeMetadataChanges:true` metadata-only
document changes are suppressed because they're confusing.
* Revert QuerySnapshot.documentChanges back to a property
Add usage.
* Move all Firestore files to Objective-C++
* Update project file references
* Don't use module imports from Objective-C++
* Use extern "C" for C-accessible globals
* Work around more stringent type checking in Objective-C++
* NSMutableDictionary ivars aren't implicitly casted to NSDictionary
* FSTMaybeDocument callback can't be passed a function that accepts
FSTDocument
* NSComparisonResult can't be multiplied by -1 without casting
* Add a #include <inttypes.h> where needed
* Avoid using C++ keywords as variables
* Remove #if __cplusplus guards
zxu