From 92887b89e35607e99bae2f19e4c5b2f162683d02 Mon Sep 17 00:00:00 2001
From: Son Ho
Date: Mon, 18 Sep 2023 19:59:19 +0200
Subject: Prove that Vec is inhabited

---
 backends/lean/Base/Primitives/Vec.lean | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'backends/lean')

diff --git a/backends/lean/Base/Primitives/Vec.lean b/backends/lean/Base/Primitives/Vec.lean
index c4c4d9f2..2d48a641 100644
--- a/backends/lean/Base/Primitives/Vec.lean
+++ b/backends/lean/Base/Primitives/Vec.lean
@@ -35,6 +35,10 @@ example {a: Type u} (v : Vec a) : v.length ≤ Scalar.max ScalarTy.Usize := by
 
 def Vec.new (α : Type u): Vec α := ⟨ [], by apply Scalar.cMax_suffices .Usize; simp ⟩
 
+instance (α : Type u) : Inhabited (Vec α) := by
+  constructor
+  apply Vec.new
+
 -- TODO: very annoying that the α is an explicit parameter
 def Vec.len (α : Type u) (v : Vec α) : Usize :=
   Usize.ofIntCore v.val.len (by scalar_tac) (by scalar_tac)
-- 
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