Files
lean4/tests/elab/grind_commsemiring.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

36 lines
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Lean4

/-!
# Tests for grind with CommSemiring
These tests verify that grind properly propagates `0 * a = 0` and `a * 0 = 0`
for CommSemiring types, not just Semiring types.
See: https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/Grind.20failure.20for.20CommSemiring.2C.20not.20Semiring
-/
-- Basic test with Semiring
example {R : Type} [Lean.Grind.Semiring R] (f r : R) (hg : f * r 0) :
f 0 := by
grind
-- Same test should also work with CommSemiring
example {R : Type} [Lean.Grind.CommSemiring R] (f r : R) (hg : f * r 0) :
f 0 := by
grind
-- Symmetric case: r * f ≠ 0 implies f ≠ 0
example {R : Type} [Lean.Grind.CommSemiring R] (f r : R) (hg : r * f 0) :
f 0 := by
grind
-- Both factors must be nonzero
example {R : Type} [Lean.Grind.CommSemiring R] (f r : R) (hg : f * r 0) :
f 0 r 0 := by
grind
-- mul_one and one_mul propagation
example {R : Type} [Lean.Grind.CommSemiring R] (f g : R) (h1 : 1 * f = g) (h2 : g f) : False := by
grind
example {R : Type} [Lean.Grind.CommSemiring R] (f g : R) (h1 : f * 1 = g) (h2 : g f) : False := by
grind