dependent-sum-0.4: Dependent sum type

Synopsis

# Documentation

class GShow t where Source #

Show-like class for 1-type-parameter GADTs. GShow t => ... is equivalent to something like (forall a. Show (t a)) => .... The easiest way to create instances would probably be to write (or derive) an instance Show (T a), and then simply say:

instance GShow t where gshowsPrec = showsPrec

Minimal complete definition

gshowsPrec

Methods

gshowsPrec :: Int -> t a -> ShowS Source #

Instances

 GShow k (GOrdering k a) Source # MethodsgshowsPrec :: Int -> t a -> ShowS Source #

gshows :: GShow t => t a -> ShowS Source #

gshow :: GShow t => t a -> String Source #

Constructors

 GReadResult FieldsgetGReadResult :: forall b. (forall a. t a -> b) -> b

GReadS t is equivalent to ReadS (forall b. (forall a. t a -> b) -> b), which is in turn equivalent to ReadS (Exists t) (with data Exists t where Exists :: t a -> Exists t)

class GRead t where Source #

Read-like class for 1-type-parameter GADTs. Unlike GShow, this one cannot be mechanically derived from a Read instance because greadsPrec must choose the phantom type based on the String being parsed.

Minimal complete definition