[Boost-users] input format library

Is there any work being done on an input format library for Boost? Something similar to Boost.Format but for input rather than output? Google tells me that this has been discussed before, but I couldn't find any resolution of the issue. I'm interested because I need something like sscanf, but want it to be more powerful and safer (like Boost.Format vs. fprintf). I know there are workarounds using Boost.Spirit, Boost.Regex, std::istream, and boost::lexical_cast, but in my mind, none of those are a complete solution for this problem. Thanks. - Daniel