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lean4/tests/elab/defaultInstBacktrackIssue.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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class HOp (α β γ) where hOp : α β γ
class LOp (α β) where lOp : α β β
class Op (α) where op : α α α
@[default_instance]
instance inst1 [LOp α β] : HOp α β β := LOp.lOp
instance inst2 [Op α] : LOp α α := Op.op
infix:75 "" => HOp.hOp
section Test
variable (α) [LOp Nat α]
variable (x y z : α) (m n : Nat)
example : n x = z := sorry -- TC works
example : 1 x = z := sorry -- TC works
attribute [default_instance] inst2
example : n x = z := sorry -- TC works
example : 1 x = z := sorry -- TC fails
end Test