Nested OR patterns aren't preserved.
Open
Nobody has claimed this yet.
KIND: BUG
Printer
- Dominant language
- OCaml
- Stars
- 10.3k
- Forks
- 438
- PR merge metrics
- No merged PRs in 30d
Description
The following:
let reasonDoubleBarNested = fun
| X | Y _ _ _ | (Z _ _ | Q) => true
| _ => false;
Is printed as:
let reasonDoubleBarNested =
fun | X
| Y _ _ _
| Z _ _
| Q => true
| _ => false;
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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 reported formatting with the nested OR pattern shown in the issue, then trace the pattern parsing or formatting entry point that flattens the nested alternatives. Done means the output preserves the parentheses around the nested OR pattern while keeping the other alternatives valid.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- ocaml
- Domain
- compilers
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100