// checking complicated partial ordering

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 *
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 * contributor  license agreements.  See  the NOTICE  file distributed
 * with  this  work  for  additional information  regarding  copyright
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 * except in  compliance with the License.   You may obtain  a copy of
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 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
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 * distributed under the  License is distributed on an  "AS IS" BASIS,
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 * implied.   See  the License  for  the  specific language  governing
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 * Copyright 1999-2007 Rogue Wave Software, Inc.
 * 
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template <class T, class U>
class S { };

template<class T, class U>
S<T, U>& operator<< (S<T, U> &s, T)
{
    return s;
}

template<class T, class U>
S<T, U>& operator<< (S<T, U> &s, char)
{
    return s;
}

template <class U>
S<char, U>& operator<< (S<char, U> &s, char)
{
    return s;
}

template <class U>
S<int, U>& operator<< (S<int, U> &s, int)
{
    return s;
}

void foo ()
{
    S<char, int> sci;
    S<int, int>  sii;

    sci << 'a';
    sii << 1;
}