Modulelens-5.3.6Haskell2010

Data.Text.Lens

classclass IsText t where

Traversals for strict or lazy Text

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
```

Instances3IsText

valueunpacked :: 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

value_Text :: IsText t => Iso' t String

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

_Text = from packed

Example1 expression

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

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