The part of the implementation that's just a wrapper around mappings is available in the repo. But the entries in the TODO file represent stuff that works only on ordered collections, and therefore has to go down into the B-tree implementation in the (nieper *) libraries. That's what I decided I wasn't interested in pursuing.

The SRFI itself is indeed in good shape.

On Mon, Jul 9, 2018 at 1:44 PM, Arthur A. Gleckler <xxxxxx@speechcode.com> wrote:

On Mon, Jul 9, 2018 at 7:21 AM Alex Shinn <xxxxxx@gmail.com> wrote:
Isn't this just a thin wrapper around SRFI 146? I do need ordered sets for one of my projects, if there's not much to be done it would be nice to finalize this.

I respect John's decision. By the time SRFI 153 was withdrawn, it was over a year old, far past the official deadline for an SRFI, and he had put a lot of work into it. One good thing about our process is that all that work is preserved, so if anyone decides to make another attempt at this idea, he won't have to start from scratch.

John, correct me if I'm wrong, but it's the implementation that remains. The document itself is in good shape, right?

Thanks.