lean2/tests/lean/run/all_goals.lean

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import data.nat
open nat algebra
attribute nat.add [unfold 2]
attribute nat.rec_on [unfold 2]
example (a b c : nat) : a + 0 = 0 + a ∧ b + 0 = 0 + b :=
begin
apply and.intro,
all_goals (state; rewrite zero_add)
end