Bug in TR and/or the macro stepper
Nobody has claimed this yet.
- Dominant language
- Racket
- Stars
- 575
- Forks
- 106
- Avg merge
- 2h 1m
- Merged PRs (30d)
- 2
Description
Resubmission of PR15199 in github. Cross posted as a macro-stepper issue too.
The code below gets the macro stepper to do what it's supposed to do.
But commenting-in the type-alias line makes it misbehave: no macro steps
are shown and the navigation arrows at the top are all grayed out.
There are a few students who reported that this happens in the new
version too.
#lang typed/racket
;(define-type-alias Token (U Symbol Integer))
(define-syntax-rule (pushdown X Y) (lambda (Z) #f))
(: balanced : String -> Boolean)
(define balanced (pushdown init init))
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
Reproduce the supplied #lang typed/racket example in the macro stepper, first without and then with the Token type-alias line enabled. Compare the macro-step output and navigation state; the issue is done when the alias no longer prevents steps from appearing or disables the navigation arrows.
Written by the indexing model from the issue text.
Assessment
- Domain
- tooling
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 30/100