Data.Text.Lens

Documentation

class IsText t where

Traversals for strict or lazy Text

Minimal complete definition

packed, builder

Methods

packed :: Iso' String t

This isomorphism can be used to pack (or unpack) strict or lazy Text.

pack x ≡ x ^. packed
unpack x ≡ x ^. from packed
packed ≡ from unpacked

builder :: Iso' t Builder

Convert between strict or lazy Text and a Builder.

fromText x ≡ x ^. builder

text :: IndexedTraversal' Int t Char

Traverse the individual characters in strict or lazy Text.

text = unpacked . traversed

Instances

IsText String

Defined in Data.Text.Lens

Methods

packed :: Iso' String String

builder :: Iso' String Builder

text :: IndexedTraversal' Int String Char

IsText Text

Defined in Data.Text.Lens

Methods

packed :: Iso' String Text

builder :: Iso' Text Builder

text :: IndexedTraversal' Int Text Char

IsText Text

Defined in Data.Text.Lens

Methods

packed :: Iso' String Text

builder :: Iso' Text Builder

text :: IndexedTraversal' Int Text Char

unpacked :: IsText t => Iso' t String

This isomorphism can be used to unpack (or pack) both strict or lazy Text.

unpack x ≡ x ^. unpacked
pack x ≡ x ^. from unpacked

This Iso is provided for notational convenience rather than out of great need, since

unpacked ≡ from packed

_Text :: IsText t => Iso' t String

This is an alias for unpacked that makes it clearer how to use it with (#).

_Text = from packed

>>> _Text # "hello" :: Strict.Text
"hello"

pattern Text :: IsText s => String -> s