Sacado_mpl_find.hpp

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//
//                           Sacado Package
//                 Copyright (2006) Sandia Corporation
//
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
// the U.S. Government retains certain rights in this software.
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// This library is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
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#ifndef SACADO_MPL_FIND_HPP
#define SACADO_MPL_FIND_HPP
 
#include <type_traits>
 
#include "Sacado_mpl_none.hpp"
#include "Sacado_mpl_begin.hpp"
#include "Sacado_mpl_end.hpp"
#include "Sacado_mpl_deref.hpp"
#include "Sacado_mpl_next.hpp"
#include "Sacado_mpl_if.hpp"
 
namespace Sacado {
 
  namespace mpl {
 
    template <class Seq, class T>
    class TypeSequenceDoesNotContainType {};
 
    template <class Seq,
              class T,
              class Iter1 = typename mpl::begin<Seq>::type,
              class Iter2 = typename mpl::end<Seq>::type>
    struct find {
      typedef typename
        mpl::mpl_if< std::is_same<typename mpl::deref<Iter1>::type, T>,
                     Iter1,
                     find<Seq, T, typename mpl::next<Iter1>::type,
                          Iter2> >::type type;
      static const int value = type::value;
    };
 
    template <class Seq, class T, class Iter1>
    struct find<Seq, T, Iter1, Iter1> {
      static const int value = TypeSequenceDoesNotContainType<Seq,T>::value;
    };
 
  }
 
}
 
#endif // SACADO_MPL_FIND_HPP