Heterogeneous.Extrablatt.Rec

data HSequenceRec (f :: Type -> Type)

Constructors

• HSequenceRec

Instances

• (Applicative f, IsSymbol sym, Lacks sym rb, Cons sym a rb rc) => FoldingWithIndex (HSequenceRec f) (Proxy sym) (f (Builder (Record ra) (Record rb))) (f a) (f (Builder (Record ra) (Record rc)))
• (Applicative f, IsSymbol sym, Lacks sym rb, RowToList x xRL, Cons sym (Record y) rb rc, FoldlRecord (HSequenceRec f) (f (Builder (Record ()) (Record ()))) xRL x (f (Builder (Record ()) (Record y)))) => FoldingWithIndex (HSequenceRec f) (Proxy sym) (f (Builder (Record ra) (Record rb))) (Record x) (f (Builder (Record ra) (Record rc)))
• (Applicative f, IsSymbol sym, Lacks sym rb, Cons sym x rb rc) => FoldingWithIndex (HSequenceRec f) (Proxy sym) (f (Builder (Record ra) (Record rb))) x (f (Builder (Record ra) (Record rc)))

hsequenceRec :: forall f rin rout. Applicative f => HFoldlWithIndex (HSequenceRec f) (f (Builder (Record ()) (Record ()))) (Record rin) (f (Builder (Record ()) (Record rout))) => Record rin -> f (Record rout)

Recursively sequence a record. E.g.

hsequenceRec { a : { b : { c : { d: Just 10, e : Just "hello" }, f : Just true } 
-- Just { a : { b : { c : { d: 10, e : "hello" }, f : true }

data HMapRec a b

Constructors

• HMapRec (a -> b)

Instances

• (IsSymbol sym, Lacks sym rb, Cons sym b rb rc) => FoldingWithIndex (HMapRec a b) (Proxy sym) (Builder (Record ra) (Record rb)) a (Builder (Record ra) (Record rc))
• (IsSymbol sym, Lacks sym rb, RowToList x xRL, Cons sym (Record y) rb rc, FoldlRecord (HMapRec a b) (Builder (Record ()) (Record ())) xRL x (Builder (Record ()) (Record y))) => FoldingWithIndex (HMapRec a b) (Proxy sym) (Builder (Record ra) (Record rb)) (Record x) (Builder (Record ra) (Record rc))
• (IsSymbol sym, Lacks sym rb, Cons sym x rb rc) => FoldingWithIndex (HMapRec a b) (Proxy sym) (Builder (Record ra) (Record rb)) x (Builder (Record ra) (Record rc))

hmapRec :: forall a b rin rout. HFoldlWithIndex (HMapRec a b) (Builder (Record ()) (Record ())) (Record rin) (Builder (Record ()) (Record rout)) => (a -> b) -> Record rin -> Record rout

Recursively maps a record using a function f.

let 
  f :: Int -> String 
  f i = show (i + 1)
hmapRec  f { a : { b : 10, c : { d: 20, e : Just "hello" }}, f : 30 }
-- { a : { b : "11", c : { d: "21", e : Just "hello" }, f : "31" }

data HMapKRec f g

Constructors

• HMapKRec (f ~> g)

Instances

• (IsSymbol sym, Lacks sym rb, Cons sym (g a) rb rc) => FoldingWithIndex (HMapKRec f g) (Proxy sym) (Builder (Record ra) (Record rb)) (f a) (Builder (Record ra) (Record rc))
• (IsSymbol sym, Lacks sym rb, RowToList x xRL, Cons sym (Record y) rb rc, FoldlRecord (HMapKRec f g) (Builder (Record ()) (Record ())) xRL x (Builder (Record ()) (Record y))) => FoldingWithIndex (HMapKRec f g) (Proxy sym) (Builder (Record ra) (Record rb)) (Record x) (Builder (Record ra) (Record rc))
• (IsSymbol sym, Lacks sym rb, Cons sym x rb rc) => FoldingWithIndex (HMapKRec f g) (Proxy sym) (Builder (Record ra) (Record rb)) x (Builder (Record ra) (Record rc))

hmapKRec :: forall f g rin rout. HFoldlWithIndex (HMapKRec f g) (Builder (Record ()) (Record ())) (Record rin) (Builder (Record ()) (Record rout)) => (f ~> g) -> Record rin -> Record rout

Recursively mapK a record using a natural transformation. E.g.

let 
  nt :: Either String ~> Maybe
  nt = hush
hmapKRec { a : { b : { c : { d: Right 10, e : Left "hello" }, f : Right true }  
-- Just { a : { b : { c : { d: Just 10, e : Nothing }, f : Just true }