By initilizing them to 0 we can catch unclosed frames at
deserialization time. It's better than leaving frame size undefined,
which may cause errors much later in deserialization process and thus
would make it harder to identifiy the real cause.
While serialization vector it is sometimes required to rollback some of
the serialized elements.
vector_position is the equivalent to the bytes_ostream position struct.
It holds information about the current position in a serialized vector,
the position in the bufffer and the current number of elements
serialized.
It will allow to rollback to the current point.
Signed-off-by: Amnon Heiman <amnon@scylladb.com>
Message-Id: <1456041750-1505-2-git-send-email-amnon@scylladb.com>
The skip template function is used when skipping data types.
By default is uses a deserializer to calculate the size.
A specific implementation save unneeded deserialization. For fix sized
object the skip function would become an expression allowing the
compiler to drop the function altogether.
Signed-off-by: Amnon Heiman <amnon@scylladb.com>
The serialization_visitors.hh contains helper classes for the readers and writers
visitors class.
place_holder is a wrapper around bytes_stream place holder.
frame is used to store size in bytes.
empty_frame is used with final object (that do not store their size)
from the code that uses it, it looks the same, but in practice it does
not store any data.
Signed-off-by: Amnon Heiman <amnon@scylladb.com>
