# Module OptParse

    module OptParse: sig .. end

Modules for GNU `getopt(3)`-style command line parsing.

    module Opt: sig .. end

This module contains the basic functions and types for defining new option types and accessing the values of options.

    module StdOpt: sig .. end

This module contains various standard options.

    module Formatter: sig .. end

This module contains the types and functions for implementing custom usage message formatters.

    module OptParser: sig .. end

This module contains the option parser itself.