Re: [Boost-users] [program_options] Named values

From: Igor Mikushkin (igor.mikushkin_at_[hidden])
Date: 2008-02-20 01:02:13

2008/2/19, Vladimir Prus <ghost_at_[hidden]>:
> Igor Mikushkin wrote:
>
> > Hi!
> >
> > I have already asked this question about a month ago.
> > But it wasn't answered and I suppose to repeat.
> >
> > I cannot find in docs how to create named vales
> > for producing output like shown in this example from docs:
> >
> >    $bin/gcc/debug/multiple_sources --help
> >    Allows options:
> >
> >    Generic options:
> >      -v [ --version ]       : print version string
> >      --help                 : produce help message
> >
> >    Configuration:
> >      --optimization n       : optimization level
> >      -I [ --include-path ] path : include path
> >
> > The "--include-path" option shown above has "path" parameter,
> > what I have is "arg".
>
> The docs example appears to be stale -- the code always
> produces 'args'. I think it's OK, because it relieves you
> from the need to think out witty names for parameters. Above,
> the word 'path' occurs three times on a line, and probably
> does not add much value.

OK. Although I think that the ability to override this standard manner
can't be redundant.

> > Also I don't understand how to restrict hidden values.
> >
> > For example I want command "myutil --help restrict this" to throw
> > an exception because of "restrict" and "this" but it doesn't do it.
>
> Why? 'restrict' appears to the value of the option --help, and this
> is an argument. What's wrong?
>

 "--help" option doesn't has any arguments in my tool.
Of course program_options processes all the arguments right
and my tool works fine. But it just ignores separate words in the command line
that does not started with "-" or "--". My tool does not have any commands or
parameters like input files, etc. I ask if I can restrict commands like
"myutil 1 2 3 4 5 the rabbit went out"

Igor