mirror of
https://github.com/idris-lang/Idris2.git
synced 2024-12-15 06:13:26 +03:00
c9b20911e1
I'm playing with some linear structures and finding these useful a lot, so good to have a consistent syntax for it. '#' is chosen because it's short, looks a bit like a cross if you look at it from the right angle (!) and so as not to clash with '@@' in preorder reasoning syntax.
33 lines
852 B
Idris
33 lines
852 B
Idris
module Linear
|
|
|
|
public export
|
|
data Usage = Once | Many
|
|
|
|
public export
|
|
data Use : Usage -> (Type -> Type) -> Type -> Type where
|
|
Pure : (1 x : a) -> Use t m a
|
|
BindOnce : (1 act : Use Once m a) -> (1 k : (1 x : a) -> Use t m b) -> Use t m b
|
|
BindMany : (1 act : Use Many m a) -> (1 k : (x : a) -> Use t m b) -> Use t m b
|
|
|
|
public export
|
|
contType : (Type -> Type) -> Usage -> Usage -> Type -> Type -> Type
|
|
contType m Once q a b = ((1 x : a) -> Use q m b)
|
|
contType m Many q a b = ((x : a) -> Use q m b)
|
|
|
|
public export
|
|
(>>=) : {p : _} -> (1 f : Use p m a) -> (1 k : contType m p q a b) -> Use q m b
|
|
(>>=) {p = Once} = BindOnce
|
|
(>>=) {p = Many} = BindMany
|
|
|
|
public export
|
|
pure : (1 x : a) -> Use t m a
|
|
pure = Pure
|
|
|
|
public export
|
|
One : (Type -> Type) -> Type -> Type
|
|
One = Use Once
|
|
|
|
public export
|
|
Any : (Type -> Type) -> Type -> Type
|
|
Any = Use Many
|