Data.Text.Lazy.Optics

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

>>> "hello" ^. packed -- :: Text"hello"

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

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

>>> Text.pack "hello" ^. unpacked -- :: String"hello"

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

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

unpacked ≡ re packed

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

_Text = re packed

>>> _Text # "hello" -- :: Text"hello"

Traverse the individual characters in a Text.

>>> anyOf text (=='c') $ Text.pack "chello"True

text = unpacked % traversed

When the type is unambiguous, you can also use the more general each.

text ≡ each

Note that when just using this as a Setter, sets map can be more efficient.

Convert between lazy Text and Builder .

fromLazyText x ≡ x ^. builder
toLazyText x ≡ x ^. re builder

Encode/Decode a lazy Text to/from lazy ByteString, via UTF-8.

Note: This function does not decode lazily, as it must consume the entire input before deciding whether or not it fails.

>>> LBS.unpack (utf8 # Text.pack "☃")[226,152,131]