diff options
Diffstat (limited to 'backends')
| -rw-r--r-- | backends/lean/Base/Primitives/Scalar.lean | 50 |
1 files changed, 25 insertions, 25 deletions
diff --git a/backends/lean/Base/Primitives/Scalar.lean b/backends/lean/Base/Primitives/Scalar.lean index 5f14a14f..157ade2c 100644 --- a/backends/lean/Base/Primitives/Scalar.lean +++ b/backends/lean/Base/Primitives/Scalar.lean @@ -313,13 +313,13 @@ theorem Scalar.bound_suffices (ty : ScalarTy) (x : Int) : apply And.intro <;> have hmin := Scalar.cMin_bound ty <;> have hmax := Scalar.cMax_bound ty <;> linarith /- [match_pattern] attribute: allows to us `Scalar.ofIntCore` inside of patterns. - This is particularly useful once we introduce notations like `u32` (which + This is particularly useful once we introduce notations like `#u32` (which desugards to `Scalar.ofIntCore`) as it allows to write expressions like this: Example: ``` match x with - | 0u32 => ... - | 1u32 => ... + | 0#u32 => ... + | 1#u32 => ... | ... ``` -/ @@ -328,7 +328,7 @@ theorem Scalar.bound_suffices (ty : ScalarTy) (x : Int) : { val := x, hmin := h.left, hmax := h.right } -- The definitions below are used later to introduce nice syntax for constants, --- like `1u32`. We are reusing the technique described here: https://leanprover.zulipchat.com/#narrow/stream/270676-lean4/topic/Different.20elaboration.20inside.2Foutside.20of.20match.20patterns/near/425455284 +-- like `1#u32`. We are reusing the technique described here: https://leanprover.zulipchat.com/#narrow/stream/270676-lean4/topic/Different.20elaboration.20inside.2Foutside.20of.20match.20patterns/near/425455284 class InBounds (ty : ScalarTy) (x : Int) := hInBounds : Scalar.cMin ty ≤ x ∧ x ≤ Scalar.cMax ty @@ -1281,38 +1281,38 @@ def U128.ofIntCore := @Scalar.ofIntCore .U128 @[match_pattern] abbrev U64.ofInt := @Scalar.ofInt .U64 @[match_pattern] abbrev U128.ofInt := @Scalar.ofInt .U128 -postfix:max "isize" => Isize.ofInt -postfix:max "i8" => I8.ofInt -postfix:max "i16" => I16.ofInt -postfix:max "i32" => I32.ofInt -postfix:max "i64" => I64.ofInt -postfix:max "i128" => I128.ofInt -postfix:max "usize" => Usize.ofInt -postfix:max "u8" => U8.ofInt -postfix:max "u16" => U16.ofInt -postfix:max "u32" => U32.ofInt -postfix:max "u64" => U64.ofInt -postfix:max "u128" => U128.ofInt +postfix:max "#isize" => Isize.ofInt +postfix:max "#i8" => I8.ofInt +postfix:max "#i16" => I16.ofInt +postfix:max "#i32" => I32.ofInt +postfix:max "#i64" => I64.ofInt +postfix:max "#i128" => I128.ofInt +postfix:max "#usize" => Usize.ofInt +postfix:max "#u8" => U8.ofInt +postfix:max "#u16" => U16.ofInt +postfix:max "#u32" => U32.ofInt +postfix:max "#u64" => U64.ofInt +postfix:max "#u128" => U128.ofInt /- Testing the notations -/ -example := 0u32 -example := 1u32 -example := 1i32 -example := 0isize -example := (-1)isize +example := 0#u32 +example := 1#u32 +example := 1#i32 +example := 0#isize +example := (-1)#isize example (x : U32) : Bool := match x with - | 0u32 => true + | 0#u32 => true | _ => false example (x : U32) : Bool := match x with - | 1u32 => true + | 1#u32 => true | _ => false example (x : I32) : Bool := match x with - | (-1)i32 => true + | (-1)#i32 => true | _ => false -- Notation for pattern matching @@ -1334,7 +1334,7 @@ example {ty} (x : Scalar ty) : Bool := | _ => false -- Testing the notations -example : Result Usize := 0usize + 1usize +example : Result Usize := 0#usize + 1#usize -- TODO: factor those lemmas out @[simp] theorem Scalar.ofInt_val_eq {ty} (h : Scalar.min ty ≤ x ∧ x ≤ Scalar.max ty) : (Scalar.ofIntCore x h).val = x := by |