lean4-htt/tests/lean/derivingHashable.lean
Kim Morrison 16bd7ea455
chore: deprecate List.iota (#6708)
This PR deprecates `List.iota`, which we make no essential use of. `iota
n` can be replaced with `(range' 1 n).reverse`. The verification lemmas
for `range'` already have better coverage than those for `iota`.
Any downstream projects using it (I am not aware of any) are encouraged
to adopt it.
2025-01-21 02:32:35 +00:00

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structure Foo where
name : String
val : List Nat
lower : Nat := List.length val
inv : val.length >= lower
flag : Bool
deriving Hashable
#eval hash <| { name := "Joe", val := (List.range' 1 40).reverse, flag := true, inv := by decide : Foo }
inductive Tree (α : Type) where
| node : List (Tree α) → Bool → Tree α
| leaf : α → Tree α
deriving Hashable
#eval hash <| Tree.node ((List.range' 1 10).reverse |>.map fun i => Tree.node [Tree.leaf i] (i%2==0)) true
inductive StructureLikeInductive where
| field : Nat -> StructureLikeInductive
deriving Hashable
#eval StructureLikeInductive.field 5 |> hash
namespace Foo
mutual
inductive Tree (α : Type u) where
| node : TreeList α → Tree α
| leaf : α → Tree α
deriving Hashable
inductive TreeList (α : Type u) where
| nil : TreeList α
| cons : Tree α → TreeList α → TreeList α
deriving Hashable
end
#eval hash <| Tree.node (TreeList.cons (Tree.leaf 30) (TreeList.cons (Tree.leaf 20) (TreeList.cons (Tree.leaf 10) TreeList.nil)))
end Foo