如何覆盖有序集的.toString方法

Question

I'm using ordered-set for some stuff in Clojure 1.3.0. My project.clj includes [ordered "1.1.0"] .

When I call (str (ordered-set 1 2 3)) I get "ordered.set.OrderedSet@6" but when I call a normal clojure hash-set (str (hash-set 1 2 3)) I get the correct "#{1 2 3}" as a result.

The str method calls .toString somewhere, so how do I override the .toString method for ordered-set so I can get a proper string out of it?

thanks

Answer 1

Well, there are two answers to this question. One is, the lazy maintainer of ordered (me) should get his act together and implement toString . The other is, you probably shouldn't be using str on anything where you care about readability - pr-str is a much more reliable data-presentation function. For example, (str {:a 'a}) and (str {:a "a"}) both result in "{:aa}" . With pr-str the type information remains.