Hi all, While I had no trouble getting the parsing part for this to work, I'm stuck on the generator part. Specifically, I'm stuck on getting the size into the output. The goal is a rule that takes a std::vector<byte> and outputs it in such a way that it is preceded by its size (in a custom encoding) and padded by zeroes to align on a four byte boundary. I want to reuse this rule in several other rules and prefer to break it up into smaller pieces. A minimalistic example of what I have come up with so far is attached. What I can't seem figure out how to get at and store the vector's size in pascal_string_size_. There also seem to be problems with refering to the stored size_ in pascal_string_payload_ and pascal_string_padding_ that I don't understand. Note that the signed/unsigned distinction is on purpose. I am aware of the side effects of assigning to size_ and that that is not threadsafe. Any help would be appreciated. Thanks in advance, -- Olaf Meeuwissen, LPIC-2 FLOSS Engineer -- AVASYS CORPORATION FSF Associate Member #1962 Help support software freedom http://www.fsf.org/jf?referrer=1962