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Subject: Re: [Boost-users] Unicode option in program_options
From: John Dlugosz (JDlugosz_at_[hidden])
Date: 2010-08-13 12:33:30

> > see reference to class template instantiation
> 'boost::program_options::typed_value<T,charT>' being compiled
> > with
> > [
> > T=std::wstring,
> > charT=char
> > ]
> You should consider po::wvalue<> template function.

Thanks Mickaël, that is better.

So, why does po::value<T> work for whatever type I want my parameter to be _except_ for wstring, which needs to use po::wvalue<T> instead?

       "the directory")

Now getting default_value to work with that was some trial and error. It didn't take L".", which is exactly what parse_command_line is going to be finding were it not the default. I would expect a token in either wide or narrow forms to work, and give the same results as those tokens would if found in the argv array.

Instead, each gives different errors. I have to use the two-arg form, which I believe is a pass-through value which won't be digested and parsed but simply assigned, and a display value to use in printing help.

Can someone explain things better? Maybe I can edit the docs or improve the tutorial, once I understand it myself.


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