Strings

import qualified Data.Text as T
import qualified Data.Text.Lazy as L

Text

The Text type represents Unicode character strings, in a time and space-efficient manner. This package provides text processing capabilities that are optimized for performance critical use, both in terms of large data quantities and high speed.

LText

Bytestring

LBytestring

Encoding

encodeUtf8

encodeUtf8 :: Text -> ByteString

> encodeUtf8 "ポケット"
"\227\131\157\227\130\177\227\131\131\227\131\136"

decodeUtf8

decodeUtf8 :: ByteString -> Text

> putStrLn $ decodeUtf8 "\227\131\157\227\130\177\227\131\131\227\131\136"
ポケット

decodeUtf8'

decodeUtf8' :: ByteString -> Either UnicodeException Text

decodeUtf8With

decodeUtf8With :: OnDecodeError -> ByteString -> Text

UnicodeException

data UnicodeException
  = DecodeError [Char] (Maybe Word8)
  | EncodeError [Char] (Maybe Char)

Strictness

fromStrict

fromStrict :: Text -> LText

toStrict

toStrict :: LText -> Text

Conversion

class StringConv a b where
  strConv :: Leniency -> a -> b

data Leniency = Lenient | Strict

toS

toS :: StringConv a b => a -> b

toSL

toSL :: StringConv a b => a -> b

Example:

a :: LByteString
a = "Einstein"

b :: Text
b = "Feynmann"

c :: ByteString
c = "Schrödinger"

example1 :: ByteString
example1 = toS b

example2 :: Bool
example2 = (a == toS b) && (toS b == c)

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