generic-data-0.6.0.1: Deriving instances with GHC.Generics and related utilities

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LanguageHaskell2010

Generic.Data.Internal.Microsurgery

Contents

Description

Surgeries that are just coerce.

Synopsis

Surgery

type Surgery (s :: *) (a :: *) = Generically (Surgery' s a) Source #

Apply a microsurgery s to a type a for DerivingVia.

Example

Expand
{-# LANGUAGE DerivingVia #-}

-- The constructors must be visible.
import Generic.Data.Microsurgery
  (Surgery, Surgery'(..), Generically(..), Derecordify)

data T = T { unT :: Int }
  deriving Show via (Surgery Derecordify T)

-- T won't be shown as a record:
--   show (T {unT = 3}) == "T 3"

newtype Surgery' (s :: *) (a :: *) Source #

Constructors

Surgery' 

Fields

Instances
(Generic a, Coercible (GSurgery s (Rep a)) (Rep a)) => Generic (Surgery' s a) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

Associated Types

type Rep (Surgery' s a) :: Type -> Type #

Methods

from :: Surgery' s a -> Rep (Surgery' s a) x #

to :: Rep (Surgery' s a) x -> Surgery' s a #

type Rep (Surgery' s a) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type Rep (Surgery' s a) = GSurgery s (Rep a)

type family GSurgery (s :: *) (f :: k -> *) :: k -> * Source #

Apply a microsurgery represented by a symbol s (declared as a dummy data type) to a generic representation f.

Instances
type GSurgery Derecordify (f :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type GSurgery Derecordify (f :: k -> Type) = GDerecordify f
type GSurgery Typeage (M1 D (MetaData nm md pk _nt) f :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type GSurgery Typeage (M1 D (MetaData nm md pk _nt) f :: k -> Type) = M1 D (MetaData nm md pk False) f
type GSurgery (RenameFields rnm) (f :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type GSurgery (RenameFields rnm) (f :: k -> Type) = GRenameFields rnm f
type GSurgery (RenameConstrs rnm) (f :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type GSurgery (RenameConstrs rnm) (f :: k -> Type) = GRenameConstrs rnm f
type GSurgery (OnFields f) (g :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type GSurgery (OnFields f) (g :: k -> Type) = GOnFields f g

Derecordify

data Derecordify :: * Source #

Forget that a type was declared using record syntax.

data Foo = Bar { baz :: Zap }

-- becomes --

data Foo = Bar Zap

Concretely, set the last field of MetaCons to False and forget field names.

This is a defunctionalized symbol, to be applied using GSurgery.

Instances
type GSurgery Derecordify (f :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type GSurgery Derecordify (f :: k -> Type) = GDerecordify f

type family GDerecordify (f :: k -> *) :: k -> * Source #

Instances
type GDerecordify (U1 :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type GDerecordify (U1 :: k -> Type) = (U1 :: k -> Type)
type GDerecordify (V1 :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type GDerecordify (V1 :: k -> Type) = (V1 :: k -> Type)
type GDerecordify (f :*: g :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type GDerecordify (f :+: g :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type GDerecordify (M1 S (MetaSel _nm su ss ds) f :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type GDerecordify (M1 S (MetaSel _nm su ss ds) f :: k -> Type) = M1 S (MetaSel (Nothing :: Maybe Symbol) su ss ds) f
type GDerecordify (M1 C (MetaCons nm fx _isRecord) f :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type GDerecordify (M1 C (MetaCons nm fx _isRecord) f :: k -> Type) = M1 C (MetaCons nm fx False) (GDerecordify f)
type GDerecordify (M1 D m f :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type GDerecordify (M1 D m f :: k -> Type) = M1 D m (GDerecordify f)

Type aging ("denewtypify")

data Typeage :: * Source #

Forget that a type is a newtype. (The pun is that "aging" a type makes it no longer "new".)

newtype Foo = Bar Baz

-- becomes --

data Foo = Bar Baz

This is a defunctionalized symbol, to be applied using GSurgery.

Instances
type GSurgery Typeage (M1 D (MetaData nm md pk _nt) f :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type GSurgery Typeage (M1 D (MetaData nm md pk _nt) f :: k -> Type) = M1 D (MetaData nm md pk False) f

Renaming

renameFields :: forall rnm f p. Coercible (GSurgery (RenameFields rnm) f) f => Data f p -> Data (GSurgery (RenameFields rnm) f) p Source #

unrenameFields :: forall rnm f p. Coercible (GSurgery (RenameFields rnm) f) f => Data f p -> Data (GSurgery (RenameFields rnm) f) p Source #

renameConstrs :: forall rnm f p. Coercible (GSurgery (RenameConstrs rnm) f) f => Data f p -> Data (GSurgery (RenameConstrs rnm) f) p Source #

unrenameConstrs :: forall rnm f p. Coercible (GSurgery (RenameConstrs rnm) f) f => Data f p -> Data (GSurgery (RenameConstrs rnm) f) p Source #

data RenameFields (rnm :: *) :: * Source #

Rename fields using the function rnm given as a parameter.

data Foo = Bar { baz :: Zap }

-- becomes, renaming "baz" to "bag" --

data Foo = Bar { bag :: Zap }

This is a defunctionalized symbol, to be applied using GSurgery.

Instances
type GSurgery (RenameFields rnm) (f :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type GSurgery (RenameFields rnm) (f :: k -> Type) = GRenameFields rnm f

type family GRenameFields (rnm :: *) (f :: k -> *) :: k -> * Source #

Instances
type GRenameFields rnm (U1 :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type GRenameFields rnm (U1 :: k -> Type) = (U1 :: k -> Type)
type GRenameFields rnm (V1 :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type GRenameFields rnm (V1 :: k -> Type) = (V1 :: k -> Type)
type GRenameFields rnm (f :*: g :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type GRenameFields rnm (f :*: g :: k -> Type) = GRenameFields rnm f :*: GRenameFields rnm g
type GRenameFields rnm (f :+: g :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type GRenameFields rnm (f :+: g :: k -> Type) = GRenameFields rnm f :+: GRenameFields rnm g
type GRenameFields rnm (M1 C m f :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type GRenameFields rnm (M1 C m f :: k -> Type) = M1 C m (GRenameFields rnm f)
type GRenameFields rnm (M1 D m f :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type GRenameFields rnm (M1 D m f :: k -> Type) = M1 D m (GRenameFields rnm f)
type GRenameFields rnm (M1 S (MetaSel (Just nm) su ss ds) f :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type GRenameFields rnm (M1 S (MetaSel (Just nm) su ss ds) f :: k -> Type) = M1 S (MetaSel (Just (rnm @@ nm)) su ss ds) f

data RenameConstrs (rnm :: *) :: * Source #

Rename constructors using the function rnm given as a parameter.

data Foo = Bar { baz :: Zap }

-- becomes, renaming "Bar" to "Car" --

data Foo = Car { baz :: Zap }

This is a defunctionalized symbol, to be applied using GSurgery.

Instances
type GSurgery (RenameConstrs rnm) (f :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type GSurgery (RenameConstrs rnm) (f :: k -> Type) = GRenameConstrs rnm f

type family GRenameConstrs (rnm :: *) (f :: k -> *) :: k -> * Source #

Instances
type GRenameConstrs rnm (V1 :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type GRenameConstrs rnm (V1 :: k -> Type) = (V1 :: k -> Type)
type GRenameConstrs rnm (f :*: g :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type GRenameConstrs rnm (f :*: g :: k -> Type) = GRenameConstrs rnm f :*: GRenameConstrs rnm g
type GRenameConstrs rnm (f :+: g :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type GRenameConstrs rnm (f :+: g :: k -> Type) = GRenameConstrs rnm f :+: GRenameConstrs rnm g
type GRenameConstrs rnm (M1 D m f :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type GRenameConstrs rnm (M1 D m f :: k -> Type) = M1 D m (GRenameConstrs rnm f)
type GRenameConstrs rnm (M1 C (MetaCons nm fi ir) f :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type GRenameConstrs rnm (M1 C (MetaCons nm fi ir) f :: k -> Type) = M1 C (MetaCons (rnm @@ nm) fi ir) f

Defining symbol functions

type family (f :: *) @@ (s :: Symbol) :: Symbol Source #

f @@ s is the application of a type-level function symbolized by f to a s :: Symbol.

A function FooToBar can be defined as follows:

data FooToBar
type instance FooToBar @@ "foo" = "bar"
Instances
type SError @@ s Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type SError @@ s = (TypeError (Text "Invalid name: " :<>: ShowType s) :: Symbol)
type SId @@ s Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type SId @@ s = s
type (SConst z) @@ _s Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type (SConst z) @@ _s = z
type (SRename xs f) @@ s Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type (SRename xs f) @@ s = SRename' xs f s

data SId Source #

Identity function Symbol -> Symbol.

Instances
type SId @@ s Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type SId @@ s = s

data SError Source #

Empty function (compile-time error when applied).

Instances
type SError @@ s Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type SError @@ s = (TypeError (Text "Invalid name: " :<>: ShowType s) :: Symbol)

data SConst (s :: Symbol) Source #

Constant function.

Instances
type (SConst z) @@ _s Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type (SConst z) @@ _s = z

data SRename (xs :: [(Symbol, Symbol)]) (f :: *) Source #

Define a function for a fixed set of strings, and fall back to f for the others.

Instances
type (SRename xs f) @@ s Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type (SRename xs f) @@ s = SRename' xs f s

type family SRename' (xs :: [(Symbol, Symbol)]) (f :: *) (s :: Symbol) where ... Source #

Closed type family for SRename.

Equations

SRename' '[] f s = f @@ s 
SRename' ('(s, t) ': _xs) _f s = t 
SRename' ('(_r, _t) ': xs) f s = SRename' xs f s 

Other

class UnifyRep (f :: k -> *) (g :: k -> *) Source #

Unify the "spines" of two generic representations (the "spine" is everything except the field types).

Instances
g' ~ (V1 :: k -> Type) => UnifyRep (V1 :: k -> Type) (g' :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

g' ~ (U1 :: k -> Type) => UnifyRep (U1 :: k -> Type) (g' :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

g' ~ (K1 i b :: k -> Type) => UnifyRep (K1 i a :: k -> Type) (g' :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

(g' ~ (g1 :*: g2), UnifyRep f1 g1, UnifyRep f2 g2) => UnifyRep (f1 :*: f2 :: k -> Type) (g' :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

(g' ~ (g1 :+: g2), UnifyRep f1 g1, UnifyRep f2 g2) => UnifyRep (f1 :+: f2 :: k -> Type) (g' :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

(g' ~ M1 s c g, UnifyRep f g) => UnifyRep (M1 s c f :: k -> Type) (g' :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

onData :: (UnifyRep r s, UnifyRep s r) => p (Data r x) (Data s y) -> p (Data r x) (Data s y) Source #

onData :: _ => (Data r x -> Data s y) -> (Data r x -> Data s y)  -- possible specialization

Can be used with generic-lens for type-changing field updates with field_ (and possibly other generic optics).

A specialization of the identity function to be used to fix types of functions on Data, unifying the "spines" of input and output generic representations (the "spine" is everything except field types, which may thus change).

data OnFields (f :: * -> *) :: * Source #

Apply a type constructor f to every field type of a generic representation r.

This is a defunctionalized symbol, to be applied using GSurgery.

Instances
type GSurgery (OnFields f) (g :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type GSurgery (OnFields f) (g :: k -> Type) = GOnFields f g

type family GOnFields (f :: * -> *) (g :: k -> *) :: k -> * Source #

Instances
type GOnFields f (V1 :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type GOnFields f (V1 :: k -> Type) = (V1 :: k -> Type)
type GOnFields f (U1 :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type GOnFields f (U1 :: k -> Type) = (U1 :: k -> Type)
type GOnFields f (K1 i a :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type GOnFields f (K1 i a :: k -> Type) = (K1 i (f a) :: k -> Type)
type GOnFields f (r :*: s :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type GOnFields f (r :*: s :: k -> Type) = GOnFields f r :*: GOnFields f s
type GOnFields f (r :+: s :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type GOnFields f (r :+: s :: k -> Type) = GOnFields f r :+: GOnFields f s
type GOnFields f (M1 s m r :: k -> Type) Source # 
Instance details

Defined in Generic.Data.Internal.Microsurgery

type GOnFields f (M1 s m r :: k -> Type) = M1 s m (GOnFields f r)

type DOnFields (f :: * -> *) (a :: *) = Data (GSurgery (OnFields f) (Rep a)) () Source #

Apply a type constructor to every field type of a type a to make a synthetic type.