Allow maps and sets in paths

[dscarpetti]

See #34

[dscarpetti]

@Frozenlock, per #34, I reserved hex codes 0xa0-0xaf for future use. Do you have any additional thoughts before this gets merged?

[Frozenlock]

Unfortunately, looking deeper into this I don't think this implementation works.

The encode doesn't result in the same value depending on the map order:

(cpath/encode {:a 1, {:k :b} 2})
;=> "¢ ia\01_001x1\0\0 ¢ ik\0ib\0\0\01_001x2\0\0\0"

(cpath/encode {{:k :b} 2, :a 1})
;=> "¢ ¢ ik\0ib\0\0\01_001x2\0\0 ia\01_001x1\0\0\0"

(def db (c/open-database! "test-db"))
(c/destroy-database! "test-db")
(let [k1 {:a 1, {:k :b} 2}
      k2 {{:k :b} 2, :a 1}]
  (c/assoc-at! db [k1] "test")
  (c/get-at! db [k2]))
;; => nil

(let [k1 {:a 1, {:k :b} 2}
      k2 {{:k :b} 2, :a 1}]
  (-> (assoc-in {} [k1] "test")
      (get-in [k2])))
;; => "test"

[dscarpetti]

Good catch. I think that issue is now fixed. I added a tests in codax.pathwise-test for the specific case above and some fuzz testing that randomizes map orderings.

[Frozenlock]

As far as I can tell, this is fixed and works well. Time for a new release? 😀