leanprover / leanprover/vscode-lean4
Display target before assumptions not always respected
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- Dominant language
- TypeScript
- Stars
- 313
- Forks
- 104
- Avg merge
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- Merged PRs (30d)
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Description
Description
There are situations (e.g. in messages) where the Infoview setting Display target before assumptions is not respected.
E.g. click on the underscore in the following:
theorem bla (a : False) : 1 = 2 := by sorry
theorem bla2 : 1 = 2 := by
let := 1
rw [bla (by _)]
The infoview shows the message
unsolved goals
this : Nat := 1
⊢ False
although i have set the setting to true.
This makes for a lot of scrolling in proofs with large contextes before i can finally see the goal.
Impact
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Contributor guide
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First steps
- Read the whole issue, then the project's contributing guide.
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- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Reproduce the issue in the Infoview with the Lean snippet from the report and the “Display target before assumptions” setting enabled. Trace the Infoview path that formats unsolved-goal messages, then verify that the target appears before assumptions in this example and in contexts with many assumptions.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- typescript
- Domain
- frontend
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Quiet
- Clarity
- Mostly clear
- Newbie friendliness
- 55/100