lean4-htt/tests/elab/unifHintAndTC.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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structure Magma where
carrier : Type u
mul : carrier → carrier → carrier
instance : CoeSort Magma (Type u) where
coe m := m.carrier
def mul {s : Magma} (a b : s) : s :=
s.mul a b
infixl:70 (priority := high) " * " => mul
example {S : Magma} (a b c : S) : b = c → a * b = a * c := by
intro h; rw [h]
def Nat.Magma : Magma where
carrier := Nat
mul a b := Nat.mul a b
unif_hint (s : Magma) where
s =?= Nat.Magma |- s.carrier =?= Nat
example (x : Nat) : Nat :=
x * x
def Prod.Magma (m : Magma) (n : Magma) : Magma where
carrier := m.carrier × n.carrier
mul a b := (a.1 * b.1, a.2 * b.2)
unif_hint (s : Magma) (m : Magma) (n : Magma) (β : Type u) (δ : Type v) where
m.carrier =?= β
n.carrier =?= δ
s =?= Prod.Magma m n
|-
s.carrier =?= β × δ
def f2 (x y : Nat) : Nat × Nat :=
(x, y) * (x, y)
#eval f2 10 20
def f3 (x y : Nat) : Nat × Nat × Nat :=
(x, y, y) * (x, y, y)
#eval f3 7 24
def magmaOfMul (α : Type u) [Mul α] : Magma where -- Bridge between `Mul α` and `Magma`
carrier := α
mul a b := Mul.mul a b
unif_hint (s : Magma) (α : Type u) [Mul α] where
s =?= magmaOfMul α
|-
s.carrier =?= α
def g (x y : Int) : Int :=
x * y -- Note that we don't have a hint connecting Magma's carrier and Int
set_option pp.all true
#print g -- magmaOfMul is used
def h (x y : UInt32) : UInt32 :=
let f z w := z * w * z
f x y