The [NESM](https://github.com/xomachine/NESM) library may also give you a hint.
It [de]serializes strings into|from structure you described. [Documentation
here](https://xomachine.github.io/NESM/)
So the code will be:
from nesm import serializable
serializable:
type Value = string # Actual memory representation of serialized string
equals to your structure
... # The "datasource" value is a stream that provides bytes of your
structure
... # Lets assume it declared and configured over here (e.g. you may use
newStringStream for string input)
let val = Value.deserialize(datasource)
echo val
The underlying implementation of the deserialize proc uses copyMem and is being
generated at compile time.
