leanprover-community / leanprover-community/mathlib4
Variable highlighting with `peel`
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Description
When variable highlighting is active in one's IDE, the variable created by peel isn't highlighted.
import Mathlib.Tactic.Peel
example (P : ℕ → Prop) (hP : ∃ n : ℕ, P n) :
∃ n : ℕ, P n := by
peel hP with hn
exact hn
Here hn should be highlighted already on the peel line.
Contributor guide
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 Mathlib.Tactic.Peel entry point and reproduce the example in an IDE with variable highlighting enabled. Trace how the name hn introduced by peel is exposed to highlighting, and consider the issue complete when hn is highlighted on the peel line as well as at its use.
Written by the indexing model from the issue text.
Assessment
- Domain
- tooling
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100