lean2/tests/lean/run/deceq_vec.lean

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import data.examples.vector
open vector nat decidable
variable A : Type
definition foo [H : decidable_eq A] : ∀ {n : nat} (v₁ v₂ : vector A n), decidable (v₁ = v₂)
| ⌞0⌟ [] [] := sorry
| ⌞n+1⌟ (a::v₁) (b::v₂) := sorry