54 lines
1 KiB
Text
54 lines
1 KiB
Text
def f [Add α] (a : α) : α :=
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a + a
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def BV (n : Nat) := { a : Array Bool // a.size = n }
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def allZero (bv : BV n) : Prop :=
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∀ i, i < n → bv.val[i] = false
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def foo (n : Nat) (h : allZero b) : BV n :=
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b
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def optbind (x : Option α) (f : α → Option β) : Option β :=
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match x with
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| none => none
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| some a => f a
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instance : Monad Option where
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bind := optbind
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pure := some
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inductive Mem : α → List α → Prop
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| head (a : α) (as : List α) : Mem a (a::as)
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def g1 {α : Type u} (a : α) : α :=
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a
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#check g1
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set_option autoBoundImplicitLocal false in
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def g2 {α : Type u /- Error -/} (a : α) : α :=
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a
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def g3 {α : Type β /- Error greek letters are not valid auto names for universes -/} (a : α) : α :=
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a
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def g4 {α : Type v} (a : α) : α :=
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a
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def g5 {α : Type (v+1)} (a : α) : α :=
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a
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def g6 {α : Type u} (a : α) :=
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let β : Type u := α
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let x : β := a
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x
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inductive M (m : Type v → Type w) where
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| f (β : Type v) : M m
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variable {m : Type u → Type u}
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def h1 (a : m α) := a
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#print h1
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