Data.String.Util

Utilities related to String.

Classes

class (Read a, Show a) => Stringy a where

Class for stringlike values that can be read and shown.

Minimal complete definition

toString, fromString

Methods

toString :: a -> String

Convert to a string.

fromString :: String -> a

Instances

((~) * (Predicate a) flag, Printable flag a, Read a, Show a) => Stringy a

Methods

toString :: a -> String

fromString :: String -> a

Functions

readExcept :: (ToString s, IsString e, MonadError e m, Read a) => s -> m a

Read a string or return a message that it cannot be parsed.

maybeString :: (Eq a, IsString a) => a -> Maybe a

Lift a non-empty string.