def next
import bend-kit-postgres@0.3.0.0/codec.bend as Codecimport Base
import bend-kit-bytes@0.3.3.0/bytes.bend as Bytes
697# The next backend message.
698def next(r: Reader) -> Reader & Next:
699 Reader{buf, +pos} = r
700 next.len(pos, Bytes.length(buf))