Does anyone know of a "language level" facility for pickling in C++?  I don't want something like Boost serialization, or Google Protocol Buffers.  Instead, something that could automatically serialize all the members of a class (with an option to exclude some members, either because they're not serializable, or else because I just don't care to save them for later). This could be accomplished with an extra action at parse time, that would generate code to handle the automatic serialization.  Has anyone heard of anything like that?
something that could automatically
  serialize all the members of a class

This is not possible in C++. Python, C#, Java et al. use run-time introspection to achieve this. You can't do that in C++, RTTI is not powerful enough.
In essence, there is nothing in the C++ language that would enable someone to discover the member variables of an object at run-time. Without that, you can't automatically serialize them.
Python-style pickling for C++?