Roadmap

migrate top level namespace which I forgot to change when I renamed the project.

Switch to cljc for ClojureScript, etc.

(optionally?) allow hierarchical matching of conditions in handlers.

use def-map-type to create a map that (at least apparently) uses `isa?` to match keys instead of simple equality so that I can use derive to get inheritance-like semantics for matching conditions
Don’t assume the global hierarchy, but make it the default.

Use pre-allocated exceptions for result! and retry!

core.match does this. The claim is that you get very good performance from exceptions used this way. The structure should be amenable to the technique.

Resolve Questions

What happens if I call retry! in a function that has already returned the head of a lazy sequence?
Is my use of clojure.core/any? as universal matcher a good idea or should I reserve something like :else or :default, or should I allow functions as matchers and then just run it, in which case any? comes back anyhow…? This is more like the default of a multi-method than the fall-through of a cond block.