| rangle | Options.Applicative.Help.Pretty, Options.Applicative.Help |
| rbrace | Options.Applicative.Help.Pretty, Options.Applicative.Help |
| rbracket | Options.Applicative.Help.Pretty, Options.Applicative.Help |
| readerAbort | Options.Applicative.Types, Options.Applicative.Builder, Options.Applicative |
| readerAsk | Options.Applicative.Types |
| readerError | Options.Applicative.Types, Options.Applicative.Builder, Options.Applicative |
| ReadM | |
| 1 (Type/Class) | Options.Applicative.Types, Options.Applicative.Builder, Options.Applicative |
| 2 (Data Constructor) | Options.Applicative.Types |
| reAnnotate | Options.Applicative.Help.Pretty, Options.Applicative.Help |
| reAnnotateS | Options.Applicative.Help.Pretty, Options.Applicative.Help |
| Red | Options.Applicative.Help.Pretty, Options.Applicative.Help |
| removeTrailingWhitespace | Options.Applicative.Help.Pretty, Options.Applicative.Help |
| renderFailure | Options.Applicative.Extra, Options.Applicative |
| renderHelp | Options.Applicative.Help.Types, Options.Applicative.Help |
| renderIO | Options.Applicative.Help.Pretty, Options.Applicative.Help |
| renderLazy | Options.Applicative.Help.Pretty, Options.Applicative.Help |
| renderStrict | Options.Applicative.Help.Pretty, Options.Applicative.Help |
| requote | Options.Applicative.Builder.Completer |
| returnA | Options.Applicative.Arrows |
| right | Options.Applicative.Arrows |
| rparen | Options.Applicative.Help.Pretty, Options.Applicative.Help |
| runA | Options.Applicative.Arrows |
| runCompleter | Options.Applicative.Types |
| runCompletion | Options.Applicative.Internal |
| runKleisli | Options.Applicative.Arrows |
| runListT | Options.Applicative.Internal |
| runP | Options.Applicative.Internal |
| runParser | Options.Applicative.Common |
| runParserFully | Options.Applicative.Common |
| runParserInfo | Options.Applicative.Common |
| runParserM | Options.Applicative.Types |
| runParserStep | Options.Applicative.Common |
| runReadM | Options.Applicative.Internal |