ndmitchell / ndmitchell/hoogle
hoogle does not find ArrowChoice functions when searching for the (->) instance
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enhancement
- Dominant language
- Haskell
- Stars
- 803
- Forks
- 152
- PR merge metrics
- No merged PRs in 30d
Description
looking for
(a -> a') -> Either a b -> Either a' b
should find
left :: ArrowChoice a => a b c -> a (Either b d) (Either c d)
but it doesn't. the same applies for (+++) (aka bimap for Either)
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First steps
- Read the whole issue, then the project's contributing guide.
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- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
No file or test is named. First reproduce the Hoogle searches for (a -> a') -> Either a b -> Either a' b, left, and (+++), then trace the search and type-matching entry points that handle ArrowChoice constraints. Done means the function signatures are returned for both searches without breaking existing type searches.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- haskell
- Domain
- search
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100