lean4-htt/tests/elab_bench/reduceMatch.lean
Garmelon 08eb78a5b2
chore: switch to new test/bench suite (#12590)
This PR sets up the new integrated test/bench suite. It then migrates
all benchmarks and some related tests to the new suite. There's also
some documentation and some linting.

For now, a lot of the old tests are left alone so this PR doesn't become
even larger than it already is. Eventually, all tests should be migrated
to the new suite though so there isn't a confusing mix of two systems.
2026-02-25 13:51:53 +00:00

39 lines
1.4 KiB
Text
Raw Permalink Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

import Lean
set_option warn.sorry false
/-!
#2564. `match` reduction currently has some special cases.
When combined with nonlinear functions like `List.insert` below,
it is crucial to preserve sharing during reduction. -/
section decidability_instances
variable {α : Type} {p : α → Prop} [DecidablePred p]
instance decidableBex : ∀ (l : List α), Decidable (∃ x, x ∈ l → p x)
| [] => isFalse sorry
| x::xs =>
match DecidablePred p x with
| isTrue h₁ => isTrue sorry
| isFalse h₁ => match decidableBex xs with
| isTrue h₂ => isTrue sorry
| isFalse h₂ => isFalse sorry
instance decidableBall (l : List α) : Decidable (∀ x, x ∈ l → p x) :=
match (inferInstance : Decidable <| ∃ x, x ∈ l → ¬ p x) with
| isFalse h => isTrue $ fun x hx => match DecidablePred p x with
| isTrue h' => h'
| isFalse h' => False.elim $ h sorry
| isTrue h => isFalse sorry
end decidability_instances
def parts : List (List Nat) := List.insert ([1, 1, 0, 0]) <| List.insert ([0, 0, 1, 1]) <|
List.insert ([1, 0, 0, 1]) <| List.insert ([1, 1, 1, 0]) <| List.insert ([1, 0, 0, 0]) <|
List.insert [1, 2, 3, 4] <| List.insert [5, 6, 7, 8] []
run_cmd
for _ in *...(10 : Nat) do
Lean.Elab.Command.elabCommand (←
`(example : ∀ (x) (_ : x ∈ parts) (y) (_ : y ∈ parts), x ++ y ∉ parts := by decide))