diff options
Diffstat (limited to 'boost/program_options/detail')
| -rw-r--r-- | boost/program_options/detail/value_semantic.hpp | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/boost/program_options/detail/value_semantic.hpp b/boost/program_options/detail/value_semantic.hpp index 978a38a86e..9531339a34 100644 --- a/boost/program_options/detail/value_semantic.hpp +++ b/boost/program_options/detail/value_semantic.hpp @@ -8,6 +8,9 @@ #include <boost/throw_exception.hpp> +// forward declaration +namespace boost { template<class T> class optional; } + namespace boost { namespace program_options { extern BOOST_PROGRAM_OPTIONS_DECL std::string arg; @@ -152,6 +155,20 @@ namespace boost { namespace program_options { } } + /** Validates optional arguments. */ + template<class T, class charT> + void validate(boost::any& v, + const std::vector<std::basic_string<charT> >& s, + boost::optional<T>*, + int) + { + validators::check_first_occurrence(v); + validators::get_single_string(s); + boost::any a; + validate(a, s, (T*)0, 0); + v = boost::any(boost::optional<T>(boost::any_cast<T>(a))); + } + template<class T, class charT> void typed_value<T, charT>:: |