Safe Haskell	Safe-Inferred
Language	Haskell2010

Text.LambdaOptions.Parseable

Synopsis

Documentation

class Parseable a where

Class describing parseable values. Much like the Read class.

Methods

parse :: [String] -> (Maybe a, Int)

Given a sequence of strings, returns Nothing and the number of strings consumed if the parse failed. Otherwise, return Just the parsed value and the number of strings consumed. Element-wise, an entire string must be parsed in the sequence to be considered a successful parse.

Instances

Parseable Float	Parses a `Float` using its `Read` instance.
Parseable Int	Parses an `Int` using its `Read` instance.
Parseable String	Identity parser.
Parseable HelpDescription	Consumes nothing. Returns the options' help description. Never fails.
Parseable a => Parseable (Maybe a)	Greedily parses a single argument or no argument. Never fails.
Parseable a => Parseable (List a)	Greedily parses arguments item-wise. Never fails.