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lean4/tests/elab/2689.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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/-!
# Tests of universe constraints for inductive types
https://github.com/leanprover/lean4/pull/2689 corrected the elaborator's `Level.geq`,
which was missing cases that the kernel `is_geq` could handle.
-/
/-!
This always worked. The universe level of `Trans₁` is inferred from the fields.
-/
structure Trans₁ {α : Sort a} {β : Sort b} {γ : Sort c}
(r : α β Sort u) (s : β γ Sort v) (t : outParam (α γ Sort w)) where
trans : r a b s b c t a c
/-!
Regression test: This was failing. An explicit universe invokes `Level.geq`.
-/
structure Trans₂ {α : Sort a} {β : Sort b} {γ : Sort c}
(r : α β Sort u) (s : β γ Sort v) (t : outParam (α γ Sort w)) :
Sort (max 1 a b c u v w) where
trans : r a b s b c t a c
/-!
Regression test: This was failing. An explicit universe invokes `Level.geq`.
-/
inductive Trans₃ {α : Sort a} {β : Sort b} {γ : Sort c}
(r : α β Sort u) (s : β γ Sort v) (t : outParam (α γ Sort w)) :
Sort (max 1 a b c u v w) where
| mk : ( a b c, r a b s b c t a c) Trans₃ r s t
/-!
Regression test: This was failing due to the included `Type (max u v)`
even though this is the inferred universe.
-/
inductive I (α : Type u) (Hom : α α Sort v) : Type (max u v) where
| mk (id : X : α, Hom X X)