lean4-htt/tests/elab/issue9844.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

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set_option warn.sorry false
def ack : Nat → Nat → Nat
| 0, y => y+1
| x+1, 0 => ack x 1
| x+1, y+1 => ack x (ack (x+1) y)
def ack' : Nat → Nat → Nat
| 0, y => y+1
| x+1, 0 => ack' x 1
| x+1, y+1 => ack' x (ack' (x+1) y)
theorem ack'_eq_ack_works (i x : Nat) : ack' i x = ack i x := by
fun_induction ack with
| case1 => sorry
| case2 => sorry
| case3 => sorry
theorem ack'_eq_ack_fails : ack' = ack := by
ext i x
fun_induction ack with -- Previously: could not find a suitable call of 'ack' in the goal
| case1 => sorry
| case2 => sorry
| case3 => sorry
theorem same_in_lctxt (i x : Nat) : False := by
have : ack ?i ?x = ack' ?i ?x := sorry
case i => exact i
case x => exact x
fun_induction ack with
| case1 => sorry
| case2 => sorry
| case3 => sorry