Safe HaskellSafe

PatternSyns

Description

Testing some pattern synonyms

Synopsis

Documentation

data FooType x #

FooType doc

Constructors

FooCtor x 

pattern Foo :: x -> FooType x #

Pattern synonym for Foo x

pattern Bar :: x -> FooType (FooType x) #

Pattern synonym for Bar x

pattern (:<->) :: x1 -> x2 -> (FooType x1, FooType (FooType x2)) #

Pattern synonym for (:<->)

data BlubType #

BlubType is existentially quantified

Constructors

Show x => BlubCtor x 

pattern Blub :: () => Show x => x -> BlubType #

Pattern synonym for Blub x

data (a :: *) >< b #

Doc for (><)

Constructors

Empty 

pattern E :: a >< b #

Pattern for Empty

pattern PatWithExplicitSig :: Eq somex => somex -> FooType somex #

Earlier ghc versions didn't allow explicit signatures on pattern synonyms.