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Syntax in the explanation #585

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iacore opened this issue Sep 7, 2024 · 0 comments

iacore commented Sep 7, 2024

I was reading https://github.com/HigherOrderCO/Kind1/blob/master/blog/1-beyond-inductive-datatypes.md, and there's one part I don't quite understand.

// Natural numbers                            
Nat: Type
  self(P: Nat -> Type) ->
  (zero: P(Nat.zero)) ->
  (succ: (pred: Nat) -> P(Nat.succ(pred))) ->
  P(self)

If it's like the code below, it makes sense to me.

// Natural numbers                            
Nat: Type
  (self : Nat) ->
  (P: Nat -> Type) ->
  (zero: P(Nat.zero)) ->
  (succ: (pred: Nat) -> P(Nat.succ(pred))) ->
  P(self)

So what is self?

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