The read stream interface. The process of internalising from a stream is achieved through a reference to an object of this type.
A store aware class defines an implements an InternalizeL() member function which is used to internalise that object and takes a reference to an RReadStream as the interface to the read stream.
readStream.PushL();// reader on cleanup stack
User::LeaveIfError(readStream.Open(fs, KTxtTestFileName, EFileRead));
readStream >> *num;
CleanupStack::PopAndDestroy(); // readStream