[refmt]: unknown error at "fun%expr" within "switch"
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Description
The below snippet causes refmt to say "Unknown error: please file an issue at github.com/facebook/reason":
let foo = () => {
switch (whatever) {
| Some(_) =>
[%expr
fun
| Some(_) => ()
]
};
};
It parses fine during build, I get the expected unbound value error:
235 | switch (whatever) {
^^^^^^^^
Error: Unbound value whatever
Reason 3.5.0 @ 8ee1ff66
The OCaml toplevel, version 4.08.1
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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
Start with the supplied Reason snippet and the refmt entry point, focusing on the [%expr] expression nested inside the switch branch. Run refmt on the reproduction and compare its response with the build parser; done when refmt no longer reports the unknown error for this valid snippet.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- ocaml
- Domain
- compilers, tooling
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Clearly specified
- Newbie friendliness
- 38/100