6 lines
162 B
Text
6 lines
162 B
Text
macro_rules | `(tactic| rfl) => `(tactic| exact Iff.rfl)
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theorem r (A : Prop) : A ↔ A := by rfl
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theorem s (A B : Prop) (h : A ↔ B) : B ↔ A := by
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rw [h]
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