Why no Impl Iterator for StreamingPeekableIter in git-packetline?

[ethever]

currently the git_packetline crate streamingly reads packetline from Read, and it provides git_packetline::StreamingPeekableIter::peek_line and git_packetline::StreamingPeekableIter::read_line.

impl Interator for StreamingPeekableIter. This will be helpful for iterating packetline over an streming Read.

the method lines exists for struct StreamingPeekableIter<BufReader<&[u8]>>, but its trait bounds were not satisfied
the following trait bounds were not satisfied:
StreamingPeekableIter<BufReader<&[u8]>>: BufRead
which is required by &mut StreamingPeekableIter<BufReader<&[u8]>>: BufRead.

[Byron]

(I have edited this former issue to better fit into this Q&A format, merging comments with content and adding some punctuation)

Believe me, I tried, but ultimately self-referencing iterators are not possible without GATs. That said, once GATs are more common this should officially become a streaming iterator.

[ethever]

I got it, appreciate for your reply.