70b27fb2d3
See issue #1694. There is an orthogonal issue. `simp` (and consequently `unfold`) cannot be used to reduce projections (e.g., `has_add.add`). This issue has been previously raised by @Armael, but it was not addressed yet.
9 lines
223 B
Text
9 lines
223 B
Text
def some_lets : ℕ → ℕ → ℕ
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| 0 v := v
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| (nat.succ n) v := let k := some_lets n v + v in k
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def some_unfolded_lets (n : ℕ) : ∃ v : ℕ , v = some_lets 5 n :=
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begin
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dunfold some_lets,
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-- admit
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end
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