lean4-htt/tests/elab/diamond8.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 Monoid (M : Type u) extends Mul M, One M where
mul_one (m : M) : m * 1 = m
class AddCommMonoid (A : Type u) extends Add A, Zero A
class MonoidWithZero (M₀ : Type u) extends Monoid M₀, Zero M₀
class Semiring (R : Type u) extends AddCommMonoid R, MonoidWithZero R, One R
#print Semiring -- only toMonoid field, no duplicate toOne
def oneViaMonoid {M} [Monoid M] : M := 1
example {R} [Semiring R] : (1 : R) = oneViaMonoid := rfl
example : Semiring Nat where
mul_one := by simp
zero := 0
one := 1