Futhark.CodeGen.Backends.GenericC.Options

This module defines a generator for getopt_long based command line argument parsing. Each option is associated with arbitrary C code that will perform side effects, usually by setting some global variables.

Documentation

data Option

Specification if a single command line option. The option must have a long name, and may also have a short name.

In the action, the option argument (if any) is stored as in the char*-typed variable optarg.

Constructors

Option

Fields

• optionLongName :: String
• optionShortName :: Maybe Char
• optionArgument :: OptionArgument
• optionDescription :: String
• optionAction :: Stm

data OptionArgument

Whether an option accepts an argument.

Constructors

NoArgument

RequiredArgument String

The String becomes part of the help text.

OptionalArgument

generateOptionParser :: String -> [Option] -> Func

Generate an option parser as a function of the given name, that accepts the given command line options. The result is a function that should be called with argc and argv. The function returns the number of argv elements that have been processed.

If option parsing fails for any reason, the entire process will terminate with error code 1.