Parse error on variable named 'pattern'
Open
Nobody has claimed this yet.
- Dominant language
- Haskell
- Stars
- 1.6k
- Forks
- 210
- PR merge metrics
- No merged PRs in 30d
Description
Example:
module Main where
f pattern = pattern
main = return ()
HLint v1.9.28 outputs:
Error: Parse error: pattern
Found:
module Main where
> f pattern = pattern
main = return ()
1 hint
PatternSynonyms are not enabled, so it is correct Haskell code.
Contributor guide
No contributing guide indexed for this repository
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Reproduce the example with HLint v1.9.28, then trace the HLint parsing entry point for how the identifier pattern is handled when PatternSynonyms are disabled. Add a regression test using the provided module and confirm it is accepted without a parse error.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- haskell
- Domain
- tooling
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 38/100