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1. readFileUTF8 :: FilePath -> IO String

   extra	System.IO.Extra

   Like readFile, but with the encoding utf8.

2. readFileUTF8' :: FilePath -> IO String

   extra	System.IO.Extra

   A strict version of readFileUTF8, see readFile' for details.

3. readBin :: (Eq a, Num a) => ReadS a

   base-compat	Numeric.Compat

   Read an unsigned number in binary notation.

   >>> readBin "10011"
   [(19,"")]
   

4. readFile' :: FilePath -> IO String

   base-compat	System.IO.Compat

   The readFile' function reads a file and returns the contents of the file as a string. The file is fully read before being returned, as with getContents'.

5. readEither :: Read a => String -> Either String a

   base-compat	Text.Read.Compat

   Parse a string using the Read instance. Succeeds if there is exactly one valid result. A Left value indicates a parse error.

   >>> readEither "123" :: Either String Int
   Right 123
   

   >>> readEither "hello" :: Either String Int
   Left "Prelude.read: no parse"
   

6. readList :: Read a => ReadS [a]

   base-compat	Text.Read.Compat

   The method readList is provided to allow the programmer to give a specialised way of parsing lists of values. For example, this is used by the predefined Read instance of the Char type, where values of type String are expected to use double quotes, rather than square brackets.

7. readListDefault :: Read a => ReadS [a]

   base-compat	Text.Read.Compat

   A possible replacement definition for the readList method (GHC only). This is only needed for GHC, and even then only for Read instances where readListPrec isn't defined as readListPrecDefault.

8. readListPrec :: Read a => ReadPrec [a]

   base-compat	Text.Read.Compat

   Proposed replacement for readList using new-style parsers (GHC only). The default definition uses readList. Instances that define readPrec should also define readListPrec as readListPrecDefault.

9. readListPrecDefault :: Read a => ReadPrec [a]

   base-compat	Text.Read.Compat

   A possible replacement definition for the readListPrec method, defined using readPrec (GHC only).

10. readMaybe :: Read a => String -> Maybe a

    base-compat	Text.Read.Compat

    Parse a string using the Read instance. Succeeds if there is exactly one valid result.

    >>> readMaybe "123" :: Maybe Int
    Just 123
    

    >>> readMaybe "hello" :: Maybe Int
    Nothing
    

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