mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-16 17:22:55 +00:00
82 lines
2.7 KiB
C++
82 lines
2.7 KiB
C++
//=============================================================================
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//
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// Copyright (c) Kitware, Inc.
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// All rights reserved.
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// See LICENSE.txt for details.
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//
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// This software is distributed WITHOUT ANY WARRANTY; without even
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// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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// PURPOSE. See the above copyright notice for more information.
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//
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// Copyright 2015 Sandia Corporation.
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// Copyright 2015 UT-Battelle, LLC.
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// Copyright 2015 Los Alamos National Security.
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//
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// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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// the U.S. Government retains certain rights in this software.
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// Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
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// Laboratory (LANL), the U.S. Government retains certain rights in
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// this software.
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//
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//=============================================================================
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#ifndef vtk_m_cont_ArrayHandleCast_h
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#define vtk_m_cont_ArrayHandleCast_h
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#include <vtkm/cont/ArrayHandleTransform.h>
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namespace vtkm
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{
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namespace cont
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{
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namespace internal
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{
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template <typename FromType, typename ToType>
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struct VTKM_ALWAYS_EXPORT Cast
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{
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VTKM_EXEC_CONT
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ToType operator()(const FromType& val) const { return static_cast<ToType>(val); }
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};
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} // namespace internal
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/// \brief Cast the values of an array to the specified type, on demand.
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///
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/// ArrayHandleCast is a specialization of ArrayHandleTransform. Given an ArrayHandle
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/// and a type, it creates a new handle that returns the elements of the array cast
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/// to the specified type.
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///
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template <typename T, typename ArrayHandleType>
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class ArrayHandleCast
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: public vtkm::cont::ArrayHandleTransform<T, ArrayHandleType,
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internal::Cast<typename ArrayHandleType::ValueType, T>,
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internal::Cast<T, typename ArrayHandleType::ValueType>>
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{
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public:
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VTKM_ARRAY_HANDLE_SUBCLASS(
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ArrayHandleCast, (ArrayHandleCast<T, ArrayHandleType>),
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(vtkm::cont::ArrayHandleTransform<T, ArrayHandleType,
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internal::Cast<typename ArrayHandleType::ValueType, T>,
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internal::Cast<T, typename ArrayHandleType::ValueType>>));
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ArrayHandleCast(const ArrayHandleType& handle)
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: Superclass(handle)
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{
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}
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};
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/// make_ArrayHandleCast is convenience function to generate an
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/// ArrayHandleCast.
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///
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template <typename T, typename HandleType>
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VTKM_CONT ArrayHandleCast<T, HandleType> make_ArrayHandleCast(const HandleType& handle,
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const T& = T())
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{
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return ArrayHandleCast<T, HandleType>(handle);
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}
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}
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} // namespace vtkm::cont
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#endif // vtk_m_cont_ArrayHandleCast_h
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