[lib.iostream.forward]:

"Header <iosfwd> synopsis

  namespace std {
    template<> class char_traits<char>;
    template<> class char_traits<wchar_t>;

    template <class charT, class traits = char_traits<charT> >
      class basic_ios;"

Is it really intended that the iosfwd header doesn't include
the declaration of the primary template for char_traits<>, i.e.

template <class T> class char_traits;

The first two lines are ill-formed unless such declaration is supplied
somewhere.

(I suppose this is just a typo unless I'm missing something?)
--
   Esa Pulkkinen                        | C++ programmers do it virtually
   E-Mail:  esap@cs.tut.fi              | everywhere with class, resulting
   WWW   :  http://www.cs.tut.fi/~esap/ | in multiple inheritance.
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