Options.Applicative.Help.Core

Documentation

cmdDesc :: Parser a -> [(Maybe String, Chunk Doc)]

Generate descriptions for commands.

briefDesc :: ParserPrefs -> Parser a -> Chunk Doc

Generate a brief help text for a parser.

missingDesc :: ParserPrefs -> Parser a -> Chunk Doc

Generate a brief help text for a parser, only including mandatory options and arguments.

fold_tree :: OptTree (Chunk Doc) -> Chunk Doc

fullDesc :: ParserPrefs -> Parser a -> Chunk Doc

Generate a full help text for a parser.

data ParserHelp

Constructors

ParserHelp

Fields

• helpError :: Chunk Doc
• helpHeader :: Chunk Doc
• helpUsage :: Chunk Doc
• helpBody :: Chunk Doc
• helpFooter :: Chunk Doc

Instances

Show ParserHelp

Methods

showsPrec :: Int -> ParserHelp -> ShowS

show :: ParserHelp -> String

showList :: [ParserHelp] -> ShowS

Semigroup ParserHelp

Methods

(<>) :: ParserHelp -> ParserHelp -> ParserHelp

sconcat :: NonEmpty ParserHelp -> ParserHelp

stimes :: Integral b => b -> ParserHelp -> ParserHelp

Monoid ParserHelp

Methods

mempty :: ParserHelp

mappend :: ParserHelp -> ParserHelp -> ParserHelp

mconcat :: [ParserHelp] -> ParserHelp

errorHelp :: Chunk Doc -> ParserHelp

headerHelp :: Chunk Doc -> ParserHelp

usageHelp :: Chunk Doc -> ParserHelp

bodyHelp :: Chunk Doc -> ParserHelp

footerHelp :: Chunk Doc -> ParserHelp

parserHelp :: ParserPrefs -> Parser a -> ParserHelp

Generate the help text for a program.

parserUsage :: ParserPrefs -> Parser a -> String -> Doc

Generate option summary.