The list of documents that changed since the last snapshot.

If it's the first snapshot, all documents will be in the list as added changes. Documents with changes only to their metadata will not be included.

Creates an invalidQuerySnapshot that has to be reassigned before it can be used.

Calling any member function on an invalidQuerySnapshot will be a no-op. If the function returns a value, it will return a zero, empty, or invalid value, depending on the type of the value.

Copy constructor.

QuerySnapshot is immutable and can be efficiently copied (no deep copy is performed).

Move constructor.

Moving is more efficient than copying for aQuerySnapshot. After being moved from, aQuerySnapshot is equivalent to its default-constructed state.

The list of documents in thisQuerySnapshot in order of the query.

Checks the emptiness of theQuerySnapshot.

Returns true if thisQuerySnapshot is valid, false if it is not valid.

An invalidQuerySnapshot could be the result of:

• Creating aQuerySnapshot using the default constructor.
• Moving from theQuerySnapshot.
• Deleting yourFirestore instance, which will invalidate all theQuerySnapshot instances associated with it.

Metadata about this snapshot, concerning its source and if it has local modifications.

Copy assignment operator.

QuerySnapshot is immutable and can be efficiently copied (no deep copy is performed).

Move assignment operator.

Moving is more efficient than copying for aQuerySnapshot. After being moved from, aQuerySnapshot is equivalent to its default-constructed state.

The query from which you got thisQuerySnapshot.

Checks the size of theQuerySnapshot.