Data.Extensible.GetOpt

A wrapper for GetOpt

Documentation

data OptDescr' a

OptDescr with a default

Constructors

OptDescr' a (OptDescr (a -> a))

Instances

Wrapper * OptDescr'

Associated Types

type Repr OptDescr' (h :: OptDescr' -> *) (v :: OptDescr') :: *

Methods

_Wrapper :: (Functor f, Profunctor p) => Optic' * * p f (h v) (Repr OptDescr' h v)

type Repr * OptDescr' a

type Repr * OptDescr' a = OptDescr' a

optNoArg

Arguments

:: [Char]

short option

-> [String]

long option

-> String

explanation

-> OptDescr' Int

Option without an argument; the result is the total count of this option.

optReqArg

Arguments

:: [Char]

short option

-> [String]

long option

-> String

placeholder

-> String

explanation

-> OptDescr' [String]

Option with an argument

getOptRecord

Arguments

:: RecordOf OptDescr' xs

a record of option descriptors

-> [String]

arguments

-> (Record xs, [String], [String], String -> String)

(result, remaining non-options, errors, usageInfo)

withGetOpt :: MonadIO m => RecordOf OptDescr' xs -> (Record xs -> [String] -> m a) -> m a

When there's an error, print it along with the usage info to stderr and terminate with exitFailure.