Text.StringLike

WARNING: This module is not intended for use outside the TagSoup library.

This module provides an abstraction for String's as used inside TagSoup. It allows TagSoup to work with String (list of Char), ByteString.Char8, ByteString.Lazy.Char8, Data.Text and Data.Text.Lazy.

Documentation

class (Typeable a, Eq a, IsString a) => StringLike a where

A class to generalise TagSoup parsing over many types of string-like types. Examples are given for the String type.

Minimal complete definition

empty, cons, uncons, toString, fromChar, strConcat, strNull, append

Methods

empty :: a

empty = ""

cons :: Char -> a -> a

cons = (:)

uncons :: a -> Maybe (Char, a)

uncons []     = Nothing
uncons (x:xs) = Just (x, xs)

toString :: a -> String

toString = id

fromChar :: Char -> a

fromChar = return

strConcat :: [a] -> a

strConcat = concat

strNull :: a -> Bool

strNull = null

append :: a -> a -> a

append = (++)

Instances

StringLike String

Methods

empty :: String

cons :: Char -> String -> String

uncons :: String -> Maybe (Char, String)

toString :: String -> String

fromChar :: Char -> String

strConcat :: [String] -> String

strNull :: String -> Bool

append :: String -> String -> String

StringLike ByteString

Methods

empty :: ByteString

cons :: Char -> ByteString -> ByteString

uncons :: ByteString -> Maybe (Char, ByteString)

toString :: ByteString -> String

fromChar :: Char -> ByteString

strConcat :: [ByteString] -> ByteString

strNull :: ByteString -> Bool

append :: ByteString -> ByteString -> ByteString

StringLike ByteString

Methods

empty :: ByteString

cons :: Char -> ByteString -> ByteString

uncons :: ByteString -> Maybe (Char, ByteString)

toString :: ByteString -> String

fromChar :: Char -> ByteString

strConcat :: [ByteString] -> ByteString

strNull :: ByteString -> Bool

append :: ByteString -> ByteString -> ByteString

StringLike Text

Methods

empty :: Text

cons :: Char -> Text -> Text

uncons :: Text -> Maybe (Char, Text)

toString :: Text -> String

fromChar :: Char -> Text

strConcat :: [Text] -> Text

strNull :: Text -> Bool

append :: Text -> Text -> Text

StringLike Text

Methods

empty :: Text

cons :: Char -> Text -> Text

uncons :: Text -> Maybe (Char, Text)

toString :: Text -> String

fromChar :: Char -> Text

strConcat :: [Text] -> Text

strNull :: Text -> Bool

append :: Text -> Text -> Text

fromString :: IsString a => String -> a

castString :: (StringLike a, StringLike b) => a -> b

Convert a String from one type to another.