Re: [boost] Is there any interest in command line interpreter class templates?

Subject: Re: [boost] Is there any interest in command line interpreter class templates?
From: alexey.tsoy (tsoy.alexey_at_[hidden])
Date: 2011-06-22 18:00:42

      | One of the primary reasons that I (and others) avoid
Boost.ProgramOptions is
      | that it doesn't 'natively' support wide strings (wide strings are
simply
      | static_cast to narrow strings with no regard to localization or
      | internationalization). How does this library compare in that
respect?

  This library was developed with taking an account of variable string
types.
Here is explanation how it is dealt with wide strings below.
The class interpreter<CharType, .. > has invoke() function template.

Executing the function

              interpreter<CharType,..>::invoke(option_name,
args_iterator_begin, args_iterator_end)

cause to calling appropriate handler like below

              option_handler
              (
                  type_cast <first_argument_type> (*
(args_iterator_begin++))
                , type_cast <second_argument_type> (*
(args_iterator_begin++))
                ...
              );

With this you can be sure that during intervening calls,
the data will not be changed.

Also in the class there is a template function "visit". By passing your
'visitor' into the function you can get information about all registered
options,
their alternative names and description.
Display the information based on internationalization settings.

One more moment that may be will have to reconsider it is parser
which is present in library. I have tested it to wstring, however, it can
not be working in some situations. But in any case, you have the ability
use your own parser.

  | How does it compare to program_options in term of features, test and new
  | Enabled use cases?

To the features can be attributed automatically detecting parameters of
an option(on the basis of the signature handler).
That allows us to develop more reliable code.
Auto-tests of multiple base classes are available.

Thank you very much for your interest.

Regards,
Alexey

P.S. please give my apologies for long reply due to my poor English.

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