Howdy,
I'm looking to patch core.match. There are a couple of cases where the
pattern matcher eliminates rows (basically, if you're pattern matching
against a Map, a row containing a map that has all wildcards will be
considered a "wildcard" row and all the subsequent rows will be removed).
Here's a couple of tests that fail:
(deftest map-pattern-match-bind-2
(is (= (let [xqq {:cz 1 :dz 2}]
(match [xqq]
[{:z a :zz b}] [:a0 a b]
[{:cz a :dz b}] [:a2 a b]
:else []))
[:a2 1 2])))
(deftest map-pattern-match-bind-3
(is (= (let [xmm {:bz 2}]
(match [xmm]
[{:az a}] [:a0 a]
[{:bz b}] [:a1 b]
:else []))
[:a1 2])))
I've been reading through the core.match code to try to fix the code so
that map matches are not treated as wildcards. As far as I can tell, if I
add a magic null guard into specialize-map-pattern-row, then the row will
not be treated as a wildcard... but my attempts to add a guard have been
less than successful. Any help or pointers would be greatly appreciated.
Thanks,
David
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