Regexp are never equal

It was prompted as a matter of consistency, which I think is valid. I can't think of a good reason to use regex's as keys though.

Comment made by: trevorhartman

This issue surfaced as a bug in my code, e.g.: (get {#"^named$" 1} #"^named$") ;=> nil ; surprise!

Datomic cannot compile-cache expressions containing a pattern (causing a day or so of debugging). I suspect this is the only built-in syntax which does not create comparable expressions when read. I think this makes sense in that regard, for caching and otherwise working with expressions which may contain patterns.

Also, the Java language spec indicates that .toString returns the string from which the pattern was compiled specifically, so implementing this would provide an intensional equality similar to unicode strings.

Jason, I have no idea if Rich would consider your recent comment compelling in a way to cause him to reconsider this issue. I am guessing that while this is a reasonable CLJ bug to comment on, a declined issue seems unlikely to get attention from anyone except the handful of people who watch all Clojure JIRA comments, and even we will forget about it a month afterwards. Maybe send an email to Clojure Dev Google group asking whether your use case warrants reopening this issue, or creating a new one?

We have no plans to reopen this.