From b6a820cc3ed1d5d4d875cddf7982aaa84ff01d44 Mon Sep 17 00:00:00 2001 From: Ryan Lahfa Date: Tue, 30 Apr 2024 14:36:40 +0200 Subject: feat(backend/lean): Raw Lean literals can be parsed into scalars automatically We can use coercion to go to integers, build a scalar out of an int via unification and let the user clear up bounds or let Lean decide them. Signed-off-by: Ryan Lahfa --- backends/lean/Base/Primitives/Scalar.lean | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/backends/lean/Base/Primitives/Scalar.lean b/backends/lean/Base/Primitives/Scalar.lean index 2bee8a2f..dccbcdf2 100644 --- a/backends/lean/Base/Primitives/Scalar.lean +++ b/backends/lean/Base/Primitives/Scalar.lean @@ -332,6 +332,11 @@ instance [Decide (Scalar.cMin ty ≤ v ∧ v ≤ Scalar.cMax ty)] : InBounds ty @[simp] abbrev Scalar.check_bounds (ty : ScalarTy) (x : Int) : Bool := (Scalar.cMin ty ≤ x || Scalar.min ty ≤ x) ∧ (x ≤ Scalar.cMax ty || x ≤ Scalar.max ty) +-- TODO(raitobezarius): the inbounds constraint is a bit ugly as we can pretty trivially +-- discharge the lhs on ≥ 0. +instance {ty: ScalarTy} [InBounds ty (Int.ofNat n)]: OfNat (Scalar ty) (n: ℕ) where + ofNat := Scalar.ofInt n + theorem Scalar.check_bounds_imp_in_bounds {ty : ScalarTy} {x : Int} (h: Scalar.check_bounds ty x) : Scalar.in_bounds ty x := by -- cgit v1.2.3