lean-ja / lean-ja/lean-by-example
オプション `trace.Elab.step` でマクロ展開を確認する
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オプション
- Dominant language
- Lean
- Stars
- 188
- Forks
- 15
- Avg merge
- 9h 8m
- Merged PRs (30d)
- 6
Description
open Lean
syntax (name := myExfalsoParser) "myExfalso" : tactic
-- remember that `Macro` is a synonym for `Syntax -> TacticM Unit`
@[macro myExfalsoParser] def implMyExfalso : Macro :=
fun stx => `(tactic| apply False.elim)
set_option trace.Elab.step true
example (p : Prop) (h : p) (f : p -> False) : 3 = 2 := by
myExfalso
exact f h
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Research direction
The issue provides a Lean code example but names no target file, test, or requested edit. First locate the documentation section covering trace.Elab.step and clarify the intended placement and expected rendered result; define what completion means before making a change.
Written by the indexing model from the issue text.
Assessment
- Domain
- documentation
- Issue type
- Documentation
- Difficulty
- 2/5
- Estimated time
- 1-3 hours
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100