lean4-htt/tests/elab/9541.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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/-!
# DecidableEq deriving handler for enumerations in higher universes
https://github.com/leanprover/lean4/issues/9541
-/
/-!
Basic case, this always worked.
-/
inductive I0 : Type
| A | B | C
deriving DecidableEq
/-!
Example from the issue.
-/
inductive I1 : Type 1
| A | B | C
deriving DecidableEq
/-!
Parameterized works.
-/
inductive I2.{u} : Type u
| A | B | C
deriving DecidableEq
/-!
Parameterized with two variables works.
-/
inductive I3.{u, v} : Type (max u v)
| A | B | C
deriving DecidableEq
/-!
Parameterized with `Sort (max 1 _)` works.
-/
inductive I4.{u} : Sort (max 1 u)
| A | B | C
deriving DecidableEq
/-- info: instDecidableEqI4 -/
#guard_msgs in #synth DecidableEq I4.{0}
/-- info: instDecidableEqI4 -/
#guard_msgs in #synth DecidableEq I4.{1}