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lean-ja / lean-by-example

コード例で学ぶ Lean 言語
https://lean-ja.github.io/lean-by-example/
MIT License
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elab コマンド使用例：tada タクティク #426

Open Seasawher opened 6 days ago

Seasawher commented 6 days ago 
import Lean
open Lean Elab Tactic

elab "tada" : tactic => do
  let gs ← getUnsolvedGoals
  if gs.isEmpty then
    logInfo "Goals accomplished 🎉"
  else
    Term.reportUnsolvedGoals gs
    throwAbortTactic

example : True := by
  trivial 
  tada