A SequenceReader should enable reading sequences of elements who are readable themselves.

seqReader.scala

implicit def seqReader[Seq[T], T](implicit reader: TwpReadable[T]): TwpReadable[Seq[T]] =
  new SequenceReader[Seq[T], T] {
    def map(in: Input) = reader read in
    def canMap(in: Input) = reader.isDefinedAt(in)
  }