On Sat, Jul 24, 2010 at 8:57 AM, Gaetano Mendola <mendola@gmail.com> wrote:

current trunk has a compilation failure, the following diff solves it

Index: boost/optional/optional_io.hpp =================================================================== --- boost/optional/optional_io.hpp      (revision 64315) +++ boost/optional/optional_io.hpp      (working copy) @@ -74,12 +74,12 @@     else     {       if ( d != '-') -        in.setstate( ios::failbit ); +        in.setstate( std::ios::failbit );

      d = in.get();

      if ( d != '-') -        in.setstate( ios::failbit ); +        in.setstate( std::ios::failbit );

      v = optional<T>() ;     }

It is already being talked about in another thread and someone is going to commit the fix here soon.