how to avoid undefined execution order for the constructors when using std::make_tuple

How can I use std::make_tuple if the execution order of the constructors is important?

For example I guess the execution order of the constructor of class A and the constructor of class B is undefined for:

std::tuple<A, B> t(std::make_tuple(A(std::cin), B(std::cin)));

I came to that conclusion after reading a comment to the question

Translating a std::tuple into a template parameter pack

that says that this

template<typename... args>
std::tuple<args...> parse(std::istream &stream) {
  return std::make_tuple(args(stream)...);
}

implementation has an undefined execution order of the constructors.

Update, providing some context:

To give some more background to what I am trying to do, here is a sketch:

I want to read in some serialized objects from stdin with the help of CodeSynthesis XSD binary parsing/serializing. Here is an example of how such parsing and serialization is done: example/cxx/tree/binary/xdr/driver.cxx

xml_schema::istream<XDR> ixdr (xdr); 
std::auto_ptr<catalog> copy (new catalog (ixdr));

I want to be able to specify a list of the classes that the serialized objects have (e.g. catalog, catalog, someOtherSerializableClass for 3 serialized objects) and store that information as a typedef

te