Dependent function type doesn't support splicing syntax
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- Dominant language
- Racket
- Stars
- 575
- Forks
- 106
- Avg merge
- 2h 1m
- Merged PRs (30d)
- 2
Description
What version of Racket are you using?
6.12
What program did you run?
(: f : ([a : Integer]) -> Integer)
(define (f x) x)
(f 1)
What should have happened?
1
If you got an error message, please include it here.
Type Checker: parse error in type;
expected a valid type
given: ((a : Integer)) in: ((a : Integer))
I hope Typed Racket can support this syntax form.
Contributor guide
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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 by reproducing the supplied Typed Racket example and inspect the type-checker path that reports the parse error for ((a : Integer)). The work is complete when the dependent function type accepts the splicing syntax and the example evaluates to 1 without a type error.
Written by the indexing model from the issue text.
Assessment
- Domain
- compilers
- Issue type
- Feature
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 40/100