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Minor README issue #4

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treeowl opened this issue Sep 3, 2014 · 0 comments
Open

Minor README issue #4

treeowl opened this issue Sep 3, 2014 · 0 comments

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@treeowl
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treeowl commented Sep 3, 2014

readme.md indicates that foldrW/buildW may be expressive enough to support mapM_. I don't think mapM_ is a problem even for foldr/build, and in fact it's currently defined so it can fuse, with no obvious challenges. Some more challenging functions include scanl, scanl', mapAccumL, and foldM. These can all be written to fuse with foldr/build, but have the potential to produce terrible results if arity analysis fails. There are also simpler missed opportunities in the GHC libs like scanr and mapAccumR. I've been working on some of these issues with others, but I'm hoping your work will give everything a boost.
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