The libcult command line interace library provides mechanisms for extracting informtaion from the command line. The following code fragment is from `libcult/examples/cli`:

    namespace
    {
      extern Char const help[] = "help";
      extern Char const version[] = "version";
      extern Char const outdir[] = "outdir";
    }

    typedef
    CLI::Options<help, Boolean,
                 version, Boolean,
                 outdir, String>
    Options;

    Int
    main (Int argc, Char* argv[])
    {
      try
      {
        Options options (CLI::parse<Options> (argc, argv));

        if (options.value<help> ())
        {
          cerr << "usage: " << argv[0] << " [--help] [--version] [--outdir <dir>]"
               << endl;
          return 0;
        }

        if (options.value<version> ())
        {
          cerr << argv[0] << " 1.2.3" << endl;
          return 0;
        }

        if (String dir = options.value<outdir> ())
        {
          cerr << "outdir: " << dir << endl;
        }
      }
      catch (CLI::UnexpectedOption const& e)
      {
        cerr << "unexpected option " << e.option () <<endl;
      }
      catch (CLI::OptionFormat const& e)
      {
        cerr << "bad format for " << e.option () << endl;
      }
    }

Copyright © 2005-2008 Boris Kolpackov.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, version 1.2; with no Invariant Sections, no Front-Cover Texts and no Back-Cover Texts.

Last updated on 4 Feb 2008