A BCS type descriptor that can serialize and deserialize values of type T.
Compose types using the bcs factory (e.g. bcs.struct, bcs.enum, bcs.vector).
Decode from a BcsReader. Syncs the singleton decoder to the reader's
state, runs the fast decode path, then syncs the position back.
For the common case, use parse() instead.
A BCS type descriptor that can serialize and deserialize values of type
T. Compose types using thebcsfactory (e.g.bcs.struct,bcs.enum,bcs.vector).