Data.Text.Lazy.Lens

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

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

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

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

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

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

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

unpacked ≡ from packed

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

_Text = from packed

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

Traverse the individual characters in a Text.

>>> anyOf text (=='c') "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, setting map can be more efficient.

Convert between lazy Text and Builder .

fromLazyText x ≡ x ^. builder
toLazyText x ≡ x ^. from 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.

>>> ByteString.unpack (utf8 # "☃")[226,152,131]