diff options
Diffstat (limited to 'backends/lean')
| -rw-r--r-- | backends/lean/Base/Primitives/ScalarNotations.lean | 44 |
1 files changed, 29 insertions, 15 deletions
diff --git a/backends/lean/Base/Primitives/ScalarNotations.lean b/backends/lean/Base/Primitives/ScalarNotations.lean index 94c0c779..3bc86a9c 100644 --- a/backends/lean/Base/Primitives/ScalarNotations.lean +++ b/backends/lean/Base/Primitives/ScalarNotations.lean @@ -8,18 +8,24 @@ namespace Primitives open Lean Meta Elab Term -macro:max x:term:max noWs "#isize" : term => `(Isize.ofInt $x (by scalar_tac)) -macro:max x:term:max noWs "#i8" : term => `(I8.ofInt $x (by scalar_tac)) -macro:max x:term:max noWs "#i16" : term => `(I16.ofInt $x (by scalar_tac)) -macro:max x:term:max noWs "#i32" : term => `(I32.ofInt $x (by scalar_tac)) -macro:max x:term:max noWs "#i64" : term => `(I64.ofInt $x (by scalar_tac)) -macro:max x:term:max noWs "#i128" : term => `(I128.ofInt $x (by scalar_tac)) -macro:max x:term:max noWs "#usize" : term => `(Usize.ofInt $x (by scalar_tac)) -macro:max x:term:max noWs "#u8" : term => `(U8.ofInt $x (by scalar_tac)) -macro:max x:term:max noWs "#u16" : term => `(U16.ofInt $x (by scalar_tac)) -macro:max x:term:max noWs "#u32" : term => `(U32.ofInt $x (by scalar_tac)) -macro:max x:term:max noWs "#u64" : term => `(U64.ofInt $x (by scalar_tac)) -macro:max x:term:max noWs "#u128" : term => `(U128.ofInt $x (by scalar_tac)) +/- Something strange happens here: when we solve the goal with scalar_tac, it + sometimes leaves meta-variables in place, which then causes issues when + type-checking functions. For instance, it happens when we have const-generics + in the translation: the constants contain meta-variables, which are then + used in the types, which cause issues later. An example is given below: + -/ +macro:max x:term:max noWs "#isize" : term => `(Isize.ofInt $x (by first | decide | scalar_tac)) +macro:max x:term:max noWs "#i8" : term => `(I8.ofInt $x (by first | decide | scalar_tac)) +macro:max x:term:max noWs "#i16" : term => `(I16.ofInt $x (by first | decide | scalar_tac)) +macro:max x:term:max noWs "#i32" : term => `(I32.ofInt $x (by first | decide | scalar_tac)) +macro:max x:term:max noWs "#i64" : term => `(I64.ofInt $x (by first | decide | scalar_tac)) +macro:max x:term:max noWs "#i128" : term => `(I128.ofInt $x (by first | decide | scalar_tac)) +macro:max x:term:max noWs "#usize" : term => `(Usize.ofInt $x (by first | decide | scalar_tac)) +macro:max x:term:max noWs "#u8" : term => `(U8.ofInt $x (by first | decide | scalar_tac)) +macro:max x:term:max noWs "#u16" : term => `(U16.ofInt $x (by first | decide | scalar_tac)) +macro:max x:term:max noWs "#u32" : term => `(U32.ofInt $x (by first | decide | scalar_tac)) +macro:max x:term:max noWs "#u64" : term => `(U64.ofInt $x (by first | decide | scalar_tac)) +macro:max x:term:max noWs "#u128" : term => `(U128.ofInt $x (by first | decide | scalar_tac)) -- Notation for pattern matching -- We make the precedence looser than the negation. @@ -32,6 +38,8 @@ example := 1#i32 example := 0#isize example := (-1)#isize +example := 1#u32 + /- -- This doesn't work anymore example (x : U32) : Bool := @@ -85,10 +93,16 @@ example : Result Usize := 0#usize + 1#usize -- More complex expressions example (x y : Int) (h : 0 ≤ x + y ∧ x + y ≤ 1000) : U32 := (x + y)#u32 -section Scalar.Examples -abbrev NList (a : Type) (x : U32) := { l : List a // l.length = x.val } +namespace Scalar.Examples + + abbrev Array (a : Type) (len : U32) := { l : List a // l.length = len.val } + + -- Checking the syntax + example : Array Int 0#u32 := ⟨ [], by simp ⟩ -example : NList Int 0#u32 := ⟨ [], by simp ⟩ + /- The example below fails if we don't use `decide` in the elaboration + of the scalar notation -/ + example (a : Array (Array Int 32#u32) 32#u32) := a end Scalar.Examples |