57   struct is_pathable { static const bool value = false; };  argument
59   template<> struct is_pathable<char*>                  { static const bool value = true; };  struct
60   template<> struct is_pathable<const char*>            { static const bool value = true; };  argument
61   template<> struct is_pathable<wchar_t*>               { static const bool value = true; };  struct
62   template<> struct is_pathable<const wchar_t*>         { static const bool value = true; };  argument
63   template<> struct is_pathable<std::string>            { static const bool value = true; };  argument
64   template<> struct is_pathable<std::wstring>           { static const bool value = true; };  argument
65   template<> struct is_pathable<std::vector<char> >     { static const bool value = true; };  argument
66   template<> struct is_pathable<std::vector<wchar_t> >  { static const bool value = true; };  struct
67   template<> struct is_pathable<std::list<char> >       { static const bool value = true; };  argument
68   template<> struct is_pathable<std::list<wchar_t> >    { static const bool value = true; };  argument
69   template<> struct is_pathable<directory_entry>        { static const bool value = true; };  struct