63 lines
1,022 B
Text
63 lines
1,022 B
Text
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namespace Foo
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protected def x := 10
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end Foo
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open Foo
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#check x -- error unknown identifier `x`
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#check Foo.x
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namespace Bla.Foo
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protected def y := 20
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def z := 30
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end Bla.Foo
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open Bla
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#check Foo.y
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open Bla.Foo
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#check y -- error unknown identifier `y`
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#check z
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protected def x := 0 -- Error
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protected partial def Foo.f (x : Nat) :=
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if x > 0 then f (x-1) * 2 else 1 -- Error
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protected partial def Bla.f (x : Nat) :=
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if x > 0 then Bla.f (x-1) * 2 else 1
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#eval Bla.f 3
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namespace Foo
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protected partial def g (x : Nat) :=
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if x > 0 then g (x-1) * 2 else 1 -- error
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end Foo
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namespace Bla
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protected partial def g (x : Nat) :=
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if x > 0 then Bla.g (x-1) * 2 else 1
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#eval g 3 -- error
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#eval Bla.g 3
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end Bla
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def S (σ : Type) (m : Type → Type) (α : Type) :=
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σ → m (α × σ)
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namespace S
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variable {σ : Type} {m : Type → Type} [Monad m] {α : Type}
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protected def pure (a : α) : S σ m α :=
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fun s => pure (a, s) -- This `pure` is the top-level one. The `pure` being defined here is called `S.pure`.
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end S
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