lean4-htt/tests/elab/1907orig.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 MulOneClass (M : Type u) extends One M, Mul M
class FunLike (F : Sort _) (α : outParam (Sort _)) (β : outParam <| α → Sort _) where
coe : F → ∀ a : α, β a
instance (priority := 100) [FunLike F α β] : CoeFun F fun _ => ∀ a : α, β a where coe := FunLike.coe
section One
variable [One M] [One N]
structure OneHom (M : Type _) (N : Type _) [One M] [One N] where
toFun : M → N
map_one' : toFun 1 = 1
class OneHomClass (F : Type _) (M N : outParam (Type _)) [outParam (One M)] [outParam (One N)]
extends FunLike F M fun _ => N where
map_one : ∀ f : F, f 1 = 1
@[simp]
theorem map_one [OneHomClass F M N] (f : F) : f 1 = 1 :=
OneHomClass.map_one f
end One
section Mul
variable [Mul M] [Mul N]
structure MulHom (M : Type _) (N : Type _) [Mul M] [Mul N] where
toFun : M → N
map_mul' : ∀ x y, toFun (x * y) = toFun x * toFun y
infixr:25 " →ₙ* " => MulHom
class MulHomClass (F : Type _) (M N : outParam (Type _)) [outParam (Mul M)] [outParam (Mul N)]
extends FunLike F M fun _ => N where
map_mul : ∀ (f : F) (x y : M), f (x * y) = f x * f y
@[simp]
theorem map_mul [MulHomClass F M N] (f : F) (x y : M) : f (x * y) = f x * f y :=
MulHomClass.map_mul f x y
end Mul
section mul_one
variable [MulOneClass M] [MulOneClass N]
structure MonoidHom (M : Type _) (N : Type _) [MulOneClass M] [MulOneClass N] extends
OneHom M N, M →ₙ* N
infixr:25 " →* " => MonoidHom
class MonoidHomClass (F : Type _) (M N : outParam (Type _)) [outParam (MulOneClass M)]
[outParam (MulOneClass N)] extends MulHomClass F M N, OneHomClass F M N
instance [MonoidHomClass F M N] : CoeTC F (M →* N) :=
⟨fun f => { toFun := f, map_one' := map_one f, map_mul' := map_mul f }⟩
-- Now we reverse the order of the parents in the extends clause:
class MonoidHomClass' (F : Type _) (M N : outParam (Type _)) [outParam (MulOneClass M)]
[outParam (MulOneClass N)] extends OneHomClass F M N, MulHomClass F M N
instance [MonoidHomClass' F M N] : CoeTC F (M →* N) :=
⟨fun f => { toFun := f, map_one' := map_one f, map_mul' := map_mul f }⟩