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lean4-htt/tests/lean/run/rec_and_tac_issue.lean
Leonardo de Moura 60d3255577 fix(library/type_context): issue #1258 again 
This is yet another fix.
2016-12-22 10:51:16 -08:00

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open nat
def f : ℕ → ℕ → ℕ
| 0 b := 0
| (succ n) b := begin cases b with b', exact 0, exact f n b' end
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