Sacado_ELRCacheFad_ExpressionTraits.hpp

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//                           Sacado Package
//                 Copyright (2006) Sandia Corporation
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// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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// This library is free software; you can redistribute it and/or modify
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#ifndef SACADO_ELRCACHEFAD_EXPRESSIONTRAITS_HPP
#define SACADO_ELRCACHEFAD_EXPRESSIONTRAITS_HPP

#include "Sacado_Traits.hpp"

// Forward declarations
namespace Sacado {
  namespace ELRCacheFad {
    template <typename T> class Expr;
  }
}

namespace Sacado {

  // We don't specialize Promote because otherwise we can get ambiguous
  // partial specializations with the Fad classes.

  template <typename T>
  struct ScalarType< ELRCacheFad::Expr<T> > {
    typedef typename ScalarType< typename ELRCacheFad::Expr<T>::value_type >::type type;
  };

  template <typename T>
  struct ValueType< ELRCacheFad::Expr<T> > {
    typedef typename ELRCacheFad::Expr<T>::value_type type;
  };

  template <typename T>
  struct IsADType< ELRCacheFad::Expr<T> > {
    static const bool value = true;
  };

  template <typename T>
  struct IsScalarType< ELRCacheFad::Expr<T> > {
    static const bool value = false;
  };

  template <typename T>
  struct Value< ELRCacheFad::Expr<T> > {
    typedef typename ValueType< ELRCacheFad::Expr<T> >::type value_type;
    static const value_type& eval(const ELRCacheFad::Expr<T>& x) { 
      return x.val(); }
  };

  template <typename T>
  struct ScalarValue< ELRCacheFad::Expr<T> > {
    typedef typename ValueType< ELRCacheFad::Expr<T> >::type value_type;
    typedef typename ScalarType< ELRCacheFad::Expr<T> >::type scalar_type;
    static const scalar_type& eval(const ELRCacheFad::Expr<T>& x) { 
      return ScalarValue<value_type>::eval(x.val()); }
  };

} // namespace Sacado

#endif // SACADO_ELRCACHEFAD_EXPRESSIONTRAITS_HPP