15 lines
343 B
Text
15 lines
343 B
Text
open tactic
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add_key_equivalence add nat.succ
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set_option pp.binder_types true
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example (a b c : nat) : a + 1 = b + 1 → b + 1 = a + 1 :=
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by do
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a ← get_local `a, b ← get_local `b,
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e₁ ← mk_app `nat.succ [a],
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e₂ ← mk_app `nat.succ [b],
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generalize e₁ `x,
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generalize e₂ `y,
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trace_state,
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intros, symmetry, assumption
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