Sacado_mpl_apply_wrap.hpp

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// @HEADER
// *****************************************************************************
//                           Sacado Package
//
// Copyright 2006 NTESS and the Sacado contributors.
// SPDX-License-Identifier: LGPL-2.1-or-later
// *****************************************************************************
// @HEADER

#ifndef SACADO_MPL_APPLY_WRAP_HPP
#define SACADO_MPL_APPLY_WRAP_HPP

#include "Sacado_mpl_none.hpp"

namespace Sacado {

  namespace mpl {

    // wrapper to call a metafunction class
    template <class F> struct 
    apply_wrap0 {
      typedef typename F::apply::type type;
    };

    template <class F, 
              class A1> 
    struct apply_wrap1 {
      typedef typename F::template apply<A1>::type type;
    };

    template <class F, 
              class A1, 
              class A2> 
    struct apply_wrap2 {
      typedef typename F::template apply<A1,A2>::type type;
    };

    template <class F, 
              class A1, 
              class A2, 
              class A3> 
    struct apply_wrap3 {
      typedef typename F::template apply<A1,A2,A3>::type type;
    };

    template <class F, 
              class A1, 
              class A2, 
              class A3,
              class A4> 
    struct apply_wrap4 {
      typedef typename F::template apply<A1,A2,A3,A4>::type type;
    };

    template <class F, 
              class A1, 
              class A2, 
              class A3,
              class A4,
              class A5> 
    struct apply_wrap5 {
      typedef typename F::template apply<A1,A2,A3,A4,A5>::type type;
    };

    template <class F, 
              class A1, 
              class A2, 
              class A3,
              class A4,
              class A5>
    struct apply_wrap : 
      apply_wrap5<F,A1,A2,A3,A4,A5> {};

    template <class F, 
              class A1, 
              class A2, 
              class A3,
              class A4>
    struct apply_wrap<F,A1,A2,A3,A4,mpl::none> : 
      apply_wrap4<F,A1,A2,A3,A4> {};

    template <class F, 
              class A1, 
              class A2, 
              class A3>
    struct apply_wrap<F,A1,A2,A3,mpl::none,mpl::none> : 
      apply_wrap3<F,A1,A2,A3> {};

    template <class F, 
              class A1, 
              class A2>
    struct apply_wrap<F,A1,A2,mpl::none,mpl::none,mpl::none> : 
      apply_wrap2<F,A1,A2> {};

    template <class F, 
              class A1>
    struct apply_wrap<F,A1,mpl::none,mpl::none,mpl::none,mpl::none> : 
      apply_wrap1<F,A1> {};

    template <class F>
    struct apply_wrap<F,mpl::none,mpl::none,mpl::none,mpl::none,mpl::none> : 
      apply_wrap0<F> {};
    
  } // namespace mpl

} // namespace Sacado

#endif // SACADO_APPLY_TYPE_WRAP_HPP