Files
lean4/tests/elab/simpMatchDiscrIssue.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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Lean4

/-!
Test support for `match`-applications in the simplifier.
The discriminants should be simplified before trying to apply congruence.
In the following example, the term `g (a + <num>)` takes an
exponential amount of time to be simplified the discriminants are not simplified,
and the `match`-application reduced before visiting the alternatives.
-/
def myid (x : Nat) := 0 + x
@[simp] theorem myid_eq : myid x = x := by simp [myid]
def f (x : Nat) (y z : Nat) : Nat :=
match myid x with
| 0 => y
| _+1 => z
def g (x : Nat) : Nat :=
match x with
| 0 => 1
| a+1 => f x (g a + 1) (g a)
theorem ex (h : a = 1) : g (a+64) = a := by
simp [g, f, h]