Function from_reader_decoded 

pub fn from_reader_decoded<R: Read>(reader: R) -> DecodingSegmentStream<R> 

Parse a reader, decoding it from the repertoire the stream’s own UNB declares — lazily.

decode_reader has to read far enough to find the UNB before it can answer, so it returns a Result — and a ? on it turns a lazy pipeline eager, forcing the caller to box the iterator or wrap the error in a one-item chain. This does the sniff on the first next() instead, so the signature stays a plain Iterator and a decode failure arrives as its first item, exactly like a parse failure does.

Example

let mut raw = b"UNB+UNOC:3+S+R+260101:0900+IC1'NAD+BY+M".to_vec();
raw.push(0xFC);
raw.extend_from_slice(b"ller'UNZ+0+IC1'");

// No `?` before the loop: the pipeline stays lazy.
let segments: Vec<_> = edifact_rs::from_reader_decoded(std::io::Cursor::new(raw))
    .collect::<Result<Vec<_>, _>>()?;
assert_eq!(segments[1].element_str(1), Some("Müller"));