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fix some comments

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rhiannon morris 2023-11-27 06:43:48 +01:00
parent 47069a9316
commit 2cafb35bc1
1 changed files with 8 additions and 6 deletions
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14
lib/Quox/Whnf/Interface.idr
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@ -83,7 +83,7 @@ isTagHead (Ann (Tag {}) (Enum {}) _) = True
isTagHead (Coe {}) = True
isTagHead _ = False
||| an expression like `0 ∷ ℕ` or `suc n ∷ ℕ`
||| an expression like `𝑘 ∷ ℕ` for a natural constant 𝑘, or `suc n ∷ ℕ`
public export %inline
isNatHead : Elim {} -> Bool
isNatHead (Ann (Nat {}) (NAT {}) _) = True
@ -160,11 +160,13 @@ isK (K {}) = True
isK _ = False
||| if `ty` is a type constructor, and `val` is a value of that type where a
||| coercion can be reduced. which is the case if any of:
||| - `ty` is an atomic type
||| - `ty` has η
||| - `val` is a constructor form
||| true if `ty` is a type constructor, and `val` is a value of that type where
||| a coercion can be reduced
|||
||| 1. `ty` is an atomic type
||| 2. `ty` has an η law that is usable in this context
||| (e.g. η for pairs only exists when σ=0, not when σ=1)
||| 3. `val` is a constructor form
public export %inline
canPushCoe : SQty -> (ty, val : Term {}) -> Bool
canPushCoe sg (TYPE {}) _ = True