Re: getopt helpWanted

[Brian Schott via Digitalmars-d-learn]

What you're trying to do is currently impossible. I filed a bug 
(https://issues.dlang.org/show_bug.cgi?id=14525) because what 
you're trying to do really should be possible.

import std.stdio : writefln;
import std.getopt;
void main(string[] args)
{
    string fname;
    try
    {
        getopt(args, std.getopt.config.required, "file|f", "File 
name", &fname);
        writefln("Options parsed: fname=%s", fname);
    }
    catch (GetOptException e)
    {
        writefln("\nERROR: %s", e.msg);
        auto p = ["placeholder"];
        auto r = getopt(p, "file|f", "File name", &fname);
        defaultGetoptPrinter("Program usage:", r.options);
    }
}