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lean4/tests/elab/1426.lean.out.expected
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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theorem ex1 : ∀ {a : Nat}, a * 2 = 2 * a :=
fun {a} =>
have h := fun a b => Eq.refl (a * b);
Eq.mp
(forall_congr fun a =>
forall_congr fun b =>
(fun a a_1 e_a =>
Eq.rec (motive := fun a_2 e_a => ∀ (a_3 : Nat), (a = a_3) = (a_2 = a_3)) (fun a_2 => Eq.refl (a = a_2)) e_a)
(a * b) (b * a) (Eq.trans (congrArg (fun _a => _a) (Nat.mul_comm a b)) (Eq.refl (b * a))) (a * b))
h 2 a
theorem ex2 : ∀ {a : Nat}, a * 2 = 2 * a :=
fun {a} =>
have h := Eq.refl fun x y => x * y;
congrFun
(congrFun
(Eq.mp
((fun a a_1 e_a =>
Eq.rec (motive := fun a_2 e_a => ∀ (a_3 : Nat → Nat → Nat), (a = a_3) = (a_2 = a_3))
(fun a_2 => Eq.refl (a = a_2)) e_a)
(fun x y => x * y) (fun x y => y * x)
(funext fun x =>
id (funext fun y => id (Eq.trans (congrArg (fun _a => _a) (Nat.mul_comm x y)) (Eq.refl (y * x)))))
Nat.mul)
h)
2)
a