lean2/tests/lean/simp_tac.lean

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import tactic
-- Create a simple rewrite set
rewrite_set simple
add_rewrite Nat::add_zeror Nat::add_zerol Nat::add_comm eq_id : simple
-- Prove the following theorem using the simplifier with the rewrite set simple
theorem Test (a b : Nat) : 0 + a + 0 + b = b + a := (by simp simple)