wow! I've not tried it yet but looks very cool...would you mind a bit of
nitpicking? In your java.clj you've got a bunch of 'extend-type' calls:
(extend-type clojure.lang.Symbol
ExpressionTree
(to-tree [this] (symbol this)))
(extend-type Character
ExpressionTree
(to-tree [this] (symbol (str this))))
(extend-type String
ExpressionTree
(to-tree [this] (symbol this)))
(extend-type Number
ExpressionTree
(to-tree [this] this))
(extend-type clojure.lang.PersistentVector
ExpressionTree
(to-tree [this] (mapv to-tree this))) Looking at this code makes me
think you were actually looking for 'extend-protocol' rather than
'extend-type'. Something like this: (extend-protocol
ExpressionTreeclojure.lang.Symbol (to-tree [this] (symbol this))
Character (to-tree [this] (-> this str symbol))String (to-tree [this]
(symbol this))Number (to-tree [this] this)clojure.lang.PersistentVector
(to-tree [this] (mapv to-tree this)) )
Jim
On 01/10/13 12:48, Daniel Kwiecinski wrote:
Hi All,
I have just pushed Deriva - automated algorithmic differentiation for
Clojure and Java.
The code is on https://github.com/lambder/Deriva
And I have blog post on
http://lambder.com/articles/deriva-automatic-algorythmic-differentiation-for-java-and-clojure/
It uses algebraic expression trees (and not so algebraic case operator
for non analytic functions) and performs symbolic manipulation on it.
The end result is java bytecode with zero function calls, just
primitive operations (apart from calling java.lang.Math funs)
Kind Regards,
Daniel Kwiecinski (lambder)
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