lean-ja / lean-ja/lean-by-example
特定のエラボレータに対して Linter を無効にする
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コード例
メタプログラミング
- Dominant language
- Lean
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- 188
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- Avg merge
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- Merged PRs (30d)
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Description
Zulip: How to avoid unused variable errors in custom elaborator?
elab (name := instantiateStx) "instantiate" nm:ident " : " t:term : command => do
Lean.Elab.Command.elabCommand <| ← `(variable [$nm : $t])
@[unused_variables_ignore_fn]
def ignoreInstantiate : Lean.Linter.IgnoreFunction := fun _ stack _ =>
stack.matches [``instantiateStx]
instantiate dec_nat : DecidableEq Nat
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 custom elaborator named instantiateStx and the Lean.Elab.Command.elabCommand call, then compare the unused_variables_ignore_fn example for ignoreInstantiate with the linked Zulip discussion. Done means the linter is disabled for the intended elaborator while unrelated unused-variable checks remain enabled.
Written by the indexing model from the issue text.
Assessment
- Domain
- tooling
- Issue type
- Feature
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100