ndmitchell / ndmitchell/hoogle
5th version fails to find mapM(traverse) by type signature
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- Dominant language
- Haskell
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Description
I was a bit surprised that new hoogle fails to find correct function for (a -> m b) -> t a -> m (t b) while previous version works correctly.
I checked results from https://www.haskell.org/hoogle/?hoogle=(a+-%3E+m+b)+-%3E+t+a+-%3E+m+(t+b) (having traverse and mapM as first matches) vs results from https://www.haskell.org/hoogle/?hoogle=(a+-%3E+m+b)+-%3E+t+a+-%3E+m+(t+b) (no traverse or mapM at all)
Is it some expected behavior of 5th version maybe?
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Research direction
Reproduce the type-signature query in the Hoogle URL from the issue and compare its results with the reported previous-version behavior. Then trace the search path responsible for type-signature matching; done means the expected behavior is established and the query's handling of traverse and mapM is corrected or clearly documented.
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Assessment
- Tech stack
- haskell
- Domain
- search
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100