Function composition similar to that has been explored a lot in the haskell
world. See:

http://www.haskell.org/haskellwiki/Arrow

I also made a small library to implement some of the operators:

https://github.com/odyssomay/clj-arrow

I think the reason arrows are so interesting in haskell is because they
generalize monads.
However, in clojure I have found them to make code harder to write/read
rather than easier,
so I kind of gave up the concept after a while (and haven't updated the
library). Although
it's possible that they are actually highly useful and I've just missed
something.

Jonathan


On Wed, Feb 20, 2013 at 3:55 PM, James MacAulay <jmacau...@gmail.com> wrote:

> Ben: of course, haha...making it a macro seems rather silly now :P
>
> Alan: I didn't know about useful before, thanks for the pointer! fix and
> to-fix look great.
>
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