ControlSignatureTagBase.h

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//============================================================================
//  The contents of this file are covered by the Viskores license. See
//  LICENSE.txt for details.
//
//  By contributing to this file, all contributors agree to the Developer
//  Certificate of Origin Version 1.1 (DCO 1.1) as stated in DCO.txt.
//============================================================================
 
//============================================================================
//  Copyright (c) Kitware, Inc.
//  All rights reserved.
//  See LICENSE.txt for details.
//
//  This software is distributed WITHOUT ANY WARRANTY; without even
//  the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
//  PURPOSE.  See the above copyright notice for more information.
//============================================================================
#ifndef viskores_cont_arg_ControlSignatureTagBase_h
#define viskores_cont_arg_ControlSignatureTagBase_h
 
#include <viskores/StaticAssert.h>
#include <viskores/internal/ExportMacros.h>
 
#include <type_traits>
 
namespace viskores
{
namespace cont
{
namespace arg
{
 
struct ControlSignatureTagBase
{
};
 
namespace internal
{
 
template <typename ControlSignatureTag>
struct ControlSignatureTagCheck
{
  static constexpr bool Valid =
    std::is_base_of<viskores::cont::arg::ControlSignatureTagBase, ControlSignatureTag>::value;
};
 
} // namespace internal
 
#define VISKORES_IS_CONTROL_SIGNATURE_TAG(tag)                             \
  VISKORES_STATIC_ASSERT_MSG(                                              \
    ::viskores::cont::arg::internal::ControlSignatureTagCheck<tag>::Valid, \
    "Provided a type that is not a valid ControlSignature tag.")
}
}
} // namespace viskores::cont::arg
 
#endif //viskores_cont_arg_ControlSignatureTagBase_h