Work on deforestation might also be relevant.
On Sun, Jan 20, 2013 at 9:57 AM, Joachim Breitner
Dear list,
with rewrite rules I can tell the compiler to replace "map id" by "id", but I still have to write that rule by hand.
Does anyone of you know about research into inferring such a rewrite rule automatically? I could imagine that for a function of type "f :: some -> args -> T a -> T b" and not-too-bad type constructors T it might be possible under what conditions on "some" and "args" infer when "f arg1 arg2 = id" holds, and if the conditions are fulfilled by functions like "id", generate a rewrite rule "f id id = id" automatically.
Thanks, Joachim -- Joachim "nomeata" Breitner mail@joachim-breitner.de | nomeata@debian.org | GPG: 0x4743206C xmpp: nomeata@joachim-breitner.de | http://www.joachim-breitner.de/
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