program_options support std::vector and not boost::container::vector

報告された po::value<boost::container::vectorstd::string> の例を再現し、既存の std::vector の処理と並行して program_options のパースを追跡します。ベクター値がどのように変換されるか、またパースで istream 演算子が不必要に要求されていないかを確認します; 示されたオプション形式がその演算子なしで正常にパースされ、テストカバレッジがあることをもって完了とします。

It may seem rather obvious, but boost::program_options doesn't appear to support boost::container::vector in the manner it supports std::vector. An an example, creating an option:

("test,T", po::value<boost::container::vector<std::string> >(),"Run a named test suite. -T <suite>:<suite arguments>")
will cause clang to say:

In file included from rogue.c++:6:
In file included from /usr/local/include/boost/program_options.hpp:15:
In file included from /usr/local/include/boost/program_options/options_description.hpp:13:
In file included from /usr/local/include/boost/program_options/value_semantic.hpp:14:
In file included from /usr/local/include/boost/lexical_cast.hpp:32:
In file included from /usr/local/include/boost/lexical_cast/try_lexical_convert.hpp:44:
/usr/local/include/boost/lexical_cast/detail/converter_lexical.hpp:243:13: error: static_assert
      failed due to requirement 'has_right_shift<std::istream, boost::container::vector<std::string, void, void>,
      boost::binary_op_detail::dont_care>::value || boost::has_right_shift<std::wistream,
      boost::container::vector<std::string, void, void>, boost::binary_op_detail::dont_care>::value' "Target type is
      neither std::istream`able nor std::wistream`able"
  ...BOOST_STATIC_ASSERT_MSG((result_t::value || boost::has_right_shift<std::basic_istream<wchar_t>, T >::value),
     ^                        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

... among other "nice" things. I've tried creating an istream for boost::container::vector and prototyping it before including program_options, but either I am not worthy or it's not possible for me to easily retrofit.

... seems like either program_options needs to make the istream optional (I'm certainly not using it) or convince boost::container::vector to include it. Dunno.