Safe Haskell	None
Language	Haskell2010

Data.Vec.Lazy.Optics

Contents

Indexing
Conversions
Orphan instances

Synopsis

ix :: Fin n -> Lens' (Vec n a) a
_Cons :: Iso (Vec ('S n) a) (Vec ('S n) b) (a, Vec n a) (b, Vec n b)
_head :: Lens' (Vec ('S n) a) a
_tail :: Lens' (Vec ('S n) a) (Vec n a)
_Pull :: SNatI n => Iso (Vec n a) (Vec n b) (Vec n a) (Vec n b)
_Vec :: SNatI n => Prism' [a] (Vec n a)

Indexing

ix :: Fin n -> Lens' (Vec n a) a Source #

Index lens.

>>> view (ix (FS FZ)) ('a' ::: 'b' ::: 'c' ::: VNil)
'b'

>>> set (ix (FS FZ)) 'x' ('a' ::: 'b' ::: 'c' ::: VNil)
'a' ::: 'x' ::: 'c' ::: VNil

_Cons :: Iso (Vec ('S n) a) (Vec ('S n) b) (a, Vec n a) (b, Vec n b) Source #

Match on non-empty Vec.

Note: lens _Cons is a Prism. In fact, Vec n a cannot have an instance of Cons as types don't match.

_head :: Lens' (Vec ('S n) a) a Source #

Head lens. Note: lens _head is a Traversal'.

>>> view _head ('a' ::: 'b' ::: 'c' ::: VNil)
'a'

>>> set _head 'x' ('a' ::: 'b' ::: 'c' ::: VNil)
'x' ::: 'b' ::: 'c' ::: VNil

_tail :: Lens' (Vec ('S n) a) (Vec n a) Source #

Tail lens.

Conversions

_Pull :: SNatI n => Iso (Vec n a) (Vec n b) (Vec n a) (Vec n b) Source #

An Iso from toPull and fromPull.

_Vec :: SNatI n => Prism' [a] (Vec n a) Source #

Prism from list.

>>> preview _Vec "foo" :: Maybe (Vec N.Nat3 Char)
Just ('f' ::: 'o' ::: 'o' ::: VNil)

>>> preview _Vec "foo" :: Maybe (Vec N.Nat2 Char)
Nothing

>>> review _Vec (True ::: False ::: VNil)
[True,False]

Orphan instances

Each (Fin n) (Vec n a) (Vec n b) a b Source #
Instance details Methods each :: IxTraversal (Fin n) (Vec n a) (Vec n b) a b #
Ixed (Vec n a) Source #	`Vec` doesn't have `At` instance, as we cannot remove value from `Vec`. See `ix` in Data.Vec.Lazy module for an `Optics` (not `Traversal`).
Instance details Associated Types type IxKind (Vec n a) # Methods ix :: Index (Vec n a) -> Optic' (IxKind (Vec n a)) NoIx (Vec n a) (IxValue (Vec n a)) #
Field1 (Vec ('S n) a) (Vec ('S n) a) a a Source #
Instance details Methods _1 :: Lens (Vec ('S n) a) (Vec ('S n) a) a a #
Field2 (Vec ('S ('S n)) a) (Vec ('S ('S n)) a) a a Source #
Instance details Methods _2 :: Lens (Vec ('S ('S n)) a) (Vec ('S ('S n)) a) a a #
Field3 (Vec ('S ('S ('S n))) a) (Vec ('S ('S ('S n))) a) a a Source #
Instance details Methods _3 :: Lens (Vec ('S ('S ('S n))) a) (Vec ('S ('S ('S n))) a) a a #
Field4 (Vec ('S ('S ('S ('S n)))) a) (Vec ('S ('S ('S ('S n)))) a) a a Source #
Instance details Methods _4 :: Lens (Vec ('S ('S ('S ('S n)))) a) (Vec ('S ('S ('S ('S n)))) a) a a #
Field5 (Vec ('S ('S ('S ('S ('S n))))) a) (Vec ('S ('S ('S ('S ('S n))))) a) a a Source #
Instance details Methods _5 :: Lens (Vec ('S ('S ('S ('S ('S n))))) a) (Vec ('S ('S ('S ('S ('S n))))) a) a a #
Field6 (Vec ('S ('S ('S ('S ('S ('S n)))))) a) (Vec ('S ('S ('S ('S ('S ('S n)))))) a) a a Source #
Instance details Methods _6 :: Lens (Vec ('S ('S ('S ('S ('S ('S n)))))) a) (Vec ('S ('S ('S ('S ('S ('S n)))))) a) a a #
Field7 (Vec ('S ('S ('S ('S ('S ('S ('S n))))))) a) (Vec ('S ('S ('S ('S ('S ('S ('S n))))))) a) a a Source #
Instance details Methods _7 :: Lens (Vec ('S ('S ('S ('S ('S ('S ('S n))))))) a) (Vec ('S ('S ('S ('S ('S ('S ('S n))))))) a) a a #
Field8 (Vec ('S ('S ('S ('S ('S ('S ('S ('S n)))))))) a) (Vec ('S ('S ('S ('S ('S ('S ('S ('S n)))))))) a) a a Source #
Instance details Methods _8 :: Lens (Vec ('S ('S ('S ('S ('S ('S ('S ('S n)))))))) a) (Vec ('S ('S ('S ('S ('S ('S ('S ('S n)))))))) a) a a #
Field9 (Vec ('S ('S ('S ('S ('S ('S ('S ('S ('S n))))))))) a) (Vec ('S ('S ('S ('S ('S ('S ('S ('S ('S n))))))))) a) a a Source #
Instance details Methods _9 :: Lens (Vec ('S ('S ('S ('S ('S ('S ('S ('S ('S n))))))))) a) (Vec ('S ('S ('S ('S ('S ('S ('S ('S ('S n))))))))) a) a a #