OptparseApplicative.Simple.Parser

Documentation

type Parser = Parser

Specification of a command line arguments parser and help generator.

Has instances of Functor, Applicative and Alternative, which you can use for composition.

argument

Arguments

:: Text

Long name

-> Maybe Char

Possible short name

-> Maybe Text

Possible description

-> Maybe (a, Text)

Possible default value with its text representation to display in the generated help

-> Parser a

Attoparsec parser of the value. The "attoparsec-data" package provides such parsers for a lot of standard types

-> Parser a

Definition of a single argument.

showableArgument

Arguments

:: Show a

=> Text

Long name

-> Maybe Char

Possible short name

-> Maybe Text

Possible description

-> Maybe a

Possible default value

-> Parser a

Attoparsec parser of the value. The "attoparsec-data" package provides such parsers for a lot of standard types

-> Parser a

lenientArgument :: LenientParser a => Text -> Maybe Char -> Maybe Text -> Maybe (a, Text) -> Parser a

Same as argument, only provided with a default parser.

showableLenientArgument :: (LenientParser a, Show a) => Text -> Maybe Char -> Maybe Text -> Maybe a -> Parser a

Same as showableArgument, only provided with a default parser.