I'm pretty new to Clojure, so please bear with me if this is obvious for
some reason. Maybe the answer is out there and I've been looking in the
wrong place.
I'm seeing some strange behavior losing type information when using eval in
certain circumstances. Here is an example:
Eval-ing a Timestamp is still a Timestamp:
(def my-timestamp (clj-time.coerce/to-timestamp (java.util.Date.)))
=> #'user/my-timestamp
(type my-timestamp)
=> java.sql.Timestamp
(eval my-timestamp)
=> #inst "2015-08-28T15:03:10.557000000-00:00"
(type (eval my-timestamp))
=> java.sql.Timestamp
Using the Timestamp as a hash value also works as expected:
(def timestamp-holder {:a my-timestamp})
=> #'user/timestamp-holder
(type (:a timestamp-holder))
=> java.sql.Timestamp
(eval (:a timestamp-holder))
=> #inst "2015-08-28T15:03:10.557000000-00:00"
(type (eval (:a timestamp-holder)))
=> java.sql.Timestamp
But now instead eval the hash map and its type gets more generic:
(eval timestamp-holder)
=> {:a #inst "2015-08-28T15:03:10.557-00:00"}
(type (:a (eval timestamp-holder)))
=> java.util.Date
Is this expected behavior?
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