root/trunk/examples/util/config/OptionsDescription.d

/*******************************************************************************

    License:    Boost Software License, v. 1.0
                Academic Free License, v. 3.0
                BSD License

    Authors:    Marcin Kuszczak, www.zapytajmnie.com (author's christian site)
                This software is inspired and partially based on Boost C++
                library named 'program_options' and created by Vladimir Prus.

    Version:    0.9.1
    Date:       30-Apr-2008

    History:    0.9.0 (08-Oct-2007) -   initial public version

    Description:
                Example shows how to show defined options for user.

 ******************************************************************************/

import std.stdio;

import doost.util.config.ProgramOptions;
import doost.util.config.CommandLineStorage;

//------------------------------------------------------------------------------

/*******************************************************************************
    Program entry point
 ******************************************************************************/
int main(char[][] args) {
    try {
        auto desc = new RegularOptions("Allowed options");
        desc.options()
            ("help", "produce help message")
            ("optimization", define!(int).defaultValue(10), "optimization level")
            ("include-path,I", define!(char[][]), "include path")
            ("input-file", define!(char[][]), "input file")
        ;

        auto spec = new CommandLineOptions;
        spec.options()
            ("input-file=*", new PositionalOption)
            ("selfdir", new SelfDir)
            ("selfname", new SelfName)
        ;



        auto po =   (new ProgramOptions).next(
                        (new CommandLineStorage(args))
                            .options(desc, spec)
                            .caption("Usage: OptionsDescription [options]")
                    );

        po.connect;


        if ("help" in po) {
            writefln(po);

            writefln("Program directory :  ", po["selfdir"].as!(char[]));
            writefln("Program name      :  ", po["selfname"].as!(char[]));
            return 0;
        }

        if ("include-path" in po) {
            writefln("Include paths are: ", po["include-path"].as!(char[][]));
        }

        if ("input-file" in po) {
            writefln("Input files are: ", po["input-file"].as!(char[][]));
        }

        writefln("Optimization level is ", po["optimization"].as!(int));

        po.disconnect;
    }
    catch(ProgramOptionsException e) {
        writefln(e);
        return 1;
    }
    return 0;
}