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chore: add the missing ExceptT.run_mk #11460

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Merged
kim-em merged 1 commit into from
Dec 10, 2025
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chore: add the missing ExceptT.run_mk #11460

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2 changes: 2 additions & 0 deletions src/Init/Control/Lawful/Instances.lean
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Expand Up @@ -25,6 +25,8 @@ namespace ExceptT
simp [run] at h
assumption

@[simp, grind =] theorem run_mk (x : m (Except ε α)) : run (mk x : ExceptT ε m α) = x := rfl

@[simp, grind =] theorem run_pure [Monad m] (x : α) : run (pure x : ExceptT ε m α) = pure (Except.ok x) := rfl

@[simp, grind =] theorem run_lift [Monad.{u, v} m] (x : m α) : run (ExceptT.lift x : ExceptT ε m α) = (Except.ok <$> x : m (Except ε α)) := rfl
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