root/trunk/examples/util/config/First.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:
                This example program shows simplest usage of library.

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

import std.stdio;

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

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

/*******************************************************************************
    Program entry point
 ******************************************************************************/
int main(string[] args) {
    try {

        auto desc = new RegularOptions("Allowed options");
        desc.options()
            ("help", "produce help message")
            ("compression", define!(int)(), "set compression level")
        ;

        auto po =   (new ProgramOptions).next(
                        (new CommandLineStorage(args))
                            .options(desc)
                    );

        po.connect;

        if ("help" in po) {
            writefln(desc.describe(new CommandLineFormatter));
            return 1;
        }

        if ("compression" in po) {
            writefln("Compression level was set to ", po["compression"]);
        } else {
            writefln("Compression level was not set.");
        }

        po.disconnect;
    }
    catch(ProgramOptionsException e) {
        writefln("Exception: ", e);
        return 1;
    }
    return 0;
}