bfd21dfae2
This modifier is required on OSX for dynamic_cast to work properly across libraries.
342 lines
12 KiB
C++
342 lines
12 KiB
C++
//============================================================================
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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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#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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#include <vtkm/cont/Logging.h>
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#include <vtkm/Range.h>
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#include <vtkm/VecTraits.h>
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#include <limits>
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namespace vtkm
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{
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namespace cont
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{
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template <typename SourceT, typename SourceStorage>
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struct VTKM_ALWAYS_EXPORT StorageTagCast
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{
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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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// The following operator looks like it should never issue a cast warning because of
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// the static_cast (and we don't want it to issue a warning). However, if ToType is
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// an object that has a constructor that takes a value that FromType can be cast to,
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// that cast can cause a warning. For example, if FromType is vtkm::Float64 and ToType
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// is vtkm::Vec<vtkm::Float32, 3>, the static_cast will first implicitly cast the
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// Float64 to a Float32 (which causes a warning) before using the static_cast to
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// construct the Vec with the Float64. The easiest way around the problem is to
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// just disable all conversion warnings here. (The pragmas are taken from those
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// used in Types.h for the VecBase class.)
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#if (!(defined(VTKM_CUDA) && (__CUDACC_VER_MAJOR__ < 8)))
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#if (defined(VTKM_GCC) || defined(VTKM_CLANG))
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wunknown-pragmas"
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#pragma GCC diagnostic ignored "-Wpragmas"
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#pragma GCC diagnostic ignored "-Wconversion"
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#pragma GCC diagnostic ignored "-Wfloat-conversion"
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#endif // gcc || clang
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#endif //not using cuda < 8
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#if defined(VTKM_MSVC)
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#pragma warning(push)
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#pragma warning(disable : 4244)
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#endif
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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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#if (!(defined(VTKM_CUDA) && (__CUDACC_VER_MAJOR__ < 8)))
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#if (defined(VTKM_GCC) || defined(VTKM_CLANG))
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#pragma GCC diagnostic pop
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#endif // gcc || clang
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#endif // not using cuda < 8
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#if defined(VTKM_MSVC)
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#pragma warning(pop)
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#endif
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};
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namespace detail
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{
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template <typename TargetT, typename SourceT, typename SourceStorage, bool... CastFlags>
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struct ArrayHandleCastTraits;
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template <typename TargetT, typename SourceT, typename SourceStorage>
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struct ArrayHandleCastTraits<TargetT, SourceT, SourceStorage>
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: ArrayHandleCastTraits<TargetT,
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SourceT,
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SourceStorage,
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std::is_convertible<SourceT, TargetT>::value,
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std::is_convertible<TargetT, SourceT>::value>
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{
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};
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// Case where the forward cast is invalid, so this array is invalid.
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template <typename TargetT, typename SourceT, typename SourceStorage, bool CanCastBackward>
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struct ArrayHandleCastTraits<TargetT, SourceT, SourceStorage, false, CanCastBackward>
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{
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struct StorageSuperclass : vtkm::cont::internal::UndefinedStorage
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{
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using PortalType = vtkm::cont::internal::detail::UndefinedArrayPortal<TargetT>;
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using PortalConstType = vtkm::cont::internal::detail::UndefinedArrayPortal<TargetT>;
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};
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};
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// Case where the forward cast is valid but the backward cast is invalid.
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template <typename TargetT, typename SourceT, typename SourceStorage>
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struct ArrayHandleCastTraits<TargetT, SourceT, SourceStorage, true, false>
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{
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using StorageTagSuperclass = StorageTagTransform<vtkm::cont::ArrayHandle<SourceT, SourceStorage>,
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vtkm::cont::internal::Cast<SourceT, TargetT>>;
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using StorageSuperclass = vtkm::cont::internal::Storage<TargetT, StorageTagSuperclass>;
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template <typename Device>
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using ArrayTransferSuperclass = ArrayTransfer<TargetT, StorageTagSuperclass, Device>;
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};
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// Case where both forward and backward casts are valid.
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template <typename TargetT, typename SourceT, typename SourceStorage>
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struct ArrayHandleCastTraits<TargetT, SourceT, SourceStorage, true, true>
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{
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using StorageTagSuperclass = StorageTagTransform<vtkm::cont::ArrayHandle<SourceT, SourceStorage>,
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vtkm::cont::internal::Cast<SourceT, TargetT>,
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vtkm::cont::internal::Cast<TargetT, SourceT>>;
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using StorageSuperclass = vtkm::cont::internal::Storage<TargetT, StorageTagSuperclass>;
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template <typename Device>
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using ArrayTransferSuperclass = ArrayTransfer<TargetT, StorageTagSuperclass, Device>;
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};
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} // namespace detail
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template <typename TargetT, typename SourceT, typename SourceStorage>
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struct Storage<TargetT, vtkm::cont::StorageTagCast<SourceT, SourceStorage>>
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: detail::ArrayHandleCastTraits<TargetT, SourceT, SourceStorage>::StorageSuperclass
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{
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using Superclass =
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typename detail::ArrayHandleCastTraits<TargetT, SourceT, SourceStorage>::StorageSuperclass;
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using Superclass::Superclass;
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};
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template <typename TargetT, typename SourceT, typename SourceStorage, typename Device>
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struct ArrayTransfer<TargetT, vtkm::cont::StorageTagCast<SourceT, SourceStorage>, Device>
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: detail::ArrayHandleCastTraits<TargetT,
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SourceT,
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SourceStorage>::template ArrayTransferSuperclass<Device>
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{
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using Superclass =
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typename detail::ArrayHandleCastTraits<TargetT,
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SourceT,
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SourceStorage>::template ArrayTransferSuperclass<Device>;
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using Superclass::Superclass;
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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::ArrayHandle<
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T,
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StorageTagCast<typename ArrayHandleType::ValueType, typename ArrayHandleType::StorageTag>>
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{
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public:
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VTKM_ARRAY_HANDLE_SUBCLASS(
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ArrayHandleCast,
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(ArrayHandleCast<T, ArrayHandleType>),
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(vtkm::cont::ArrayHandle<
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T,
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StorageTagCast<typename ArrayHandleType::ValueType, typename ArrayHandleType::StorageTag>>));
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ArrayHandleCast(const vtkm::cont::ArrayHandle<typename ArrayHandleType::ValueType,
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typename ArrayHandleType::StorageTag>& handle)
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: Superclass(typename Superclass::StorageType(handle))
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{
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this->ValidateTypeCast<typename ArrayHandleType::ValueType>();
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}
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/// Implemented so that it is defined exclusively in the control environment.
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/// If there is a separate device for the execution environment (for example,
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/// with CUDA), then the automatically generated destructor could be
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/// created for all devices, and it would not be valid for all devices.
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///
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~ArrayHandleCast() {}
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private:
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// Log warnings if type cast is valid but lossy:
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template <typename SrcValueType>
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VTKM_CONT static typename std::enable_if<!std::is_same<T, SrcValueType>::value>::type
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ValidateTypeCast()
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{
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#ifdef VTKM_ENABLE_LOGGING
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using DstValueType = T;
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using SrcComp = typename vtkm::VecTraits<SrcValueType>::BaseComponentType;
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using DstComp = typename vtkm::VecTraits<DstValueType>::BaseComponentType;
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using SrcLimits = std::numeric_limits<SrcComp>;
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using DstLimits = std::numeric_limits<DstComp>;
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const vtkm::Range SrcRange{ SrcLimits::min(), SrcLimits::max() };
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const vtkm::Range DstRange{ DstLimits::min(), DstLimits::max() };
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const bool RangeLoss = (SrcRange.Max > DstRange.Max || SrcRange.Min < DstRange.Min);
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const bool PrecLoss = SrcLimits::digits > DstLimits::digits;
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if (RangeLoss && PrecLoss)
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{
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VTKM_LOG_F(vtkm::cont::LogLevel::Warn,
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"VariantArrayHandle::AsVirtual: Casting ComponentType of "
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"%s to %s reduces range and precision.",
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vtkm::cont::TypeToString<SrcValueType>().c_str(),
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vtkm::cont::TypeToString<DstValueType>().c_str());
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}
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else if (RangeLoss)
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{
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VTKM_LOG_F(vtkm::cont::LogLevel::Warn,
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"VariantArrayHandle::AsVirtual: Casting ComponentType of "
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"%s to %s reduces range.",
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vtkm::cont::TypeToString<SrcValueType>().c_str(),
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vtkm::cont::TypeToString<DstValueType>().c_str());
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}
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else if (PrecLoss)
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{
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VTKM_LOG_F(vtkm::cont::LogLevel::Warn,
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"VariantArrayHandle::AsVirtual: Casting ComponentType of "
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"%s to %s reduces precision.",
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vtkm::cont::TypeToString<SrcValueType>().c_str(),
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vtkm::cont::TypeToString<DstValueType>().c_str());
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}
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#endif // Logging
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}
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template <typename SrcValueType>
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VTKM_CONT static typename std::enable_if<std::is_same<T, SrcValueType>::value>::type
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ValidateTypeCast()
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{
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//no-op if types match
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}
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};
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namespace detail
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{
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template <typename CastType, typename OriginalType, typename ArrayType>
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struct MakeArrayHandleCastImpl
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{
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using ReturnType = vtkm::cont::ArrayHandleCast<CastType, ArrayType>;
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VTKM_CONT static ReturnType DoMake(const ArrayType& array) { return ReturnType(array); }
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};
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template <typename T, typename ArrayType>
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struct MakeArrayHandleCastImpl<T, T, ArrayType>
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{
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using ReturnType = ArrayType;
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VTKM_CONT static ReturnType DoMake(const ArrayType& array) { return array; }
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};
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} // namespace detail
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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 ArrayType>
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VTKM_CONT
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typename detail::MakeArrayHandleCastImpl<T, typename ArrayType::ValueType, ArrayType>::ReturnType
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make_ArrayHandleCast(const ArrayType& array, const T& = T())
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{
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VTKM_IS_ARRAY_HANDLE(ArrayType);
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using MakeImpl = detail::MakeArrayHandleCastImpl<T, typename ArrayType::ValueType, ArrayType>;
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return MakeImpl::DoMake(array);
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}
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}
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} // namespace vtkm::cont
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//=============================================================================
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// Specializations of serialization related classes
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/// @cond SERIALIZATION
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namespace vtkm
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{
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namespace cont
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{
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template <typename T, typename AH>
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struct SerializableTypeString<vtkm::cont::ArrayHandleCast<T, AH>>
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{
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static VTKM_CONT const std::string& Get()
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{
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static std::string name = "AH_Cast<" + SerializableTypeString<T>::Get() + "," +
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SerializableTypeString<typename AH::ValueType>::Get() + "," +
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SerializableTypeString<typename AH::StorageTag>::Get() + ">";
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return name;
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}
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};
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template <typename T1, typename T2, typename S>
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struct SerializableTypeString<vtkm::cont::ArrayHandle<T1, vtkm::cont::StorageTagCast<T2, S>>>
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: SerializableTypeString<vtkm::cont::ArrayHandleCast<T1, vtkm::cont::ArrayHandle<T2, S>>>
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{
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};
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}
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} // namespace vtkm::cont
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namespace mangled_diy_namespace
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{
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template <typename TargetT, typename SourceT, typename SourceStorage>
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struct Serialization<
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vtkm::cont::ArrayHandle<TargetT, vtkm::cont::StorageTagCast<SourceT, SourceStorage>>>
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{
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private:
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using BaseType =
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vtkm::cont::ArrayHandle<TargetT, vtkm::cont::StorageTagCast<SourceT, SourceStorage>>;
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public:
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static VTKM_CONT void save(BinaryBuffer& bb, const BaseType& obj)
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{
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vtkmdiy::save(bb, obj.GetStorage().GetArray());
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}
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static VTKM_CONT void load(BinaryBuffer& bb, BaseType& obj)
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{
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vtkm::cont::ArrayHandle<SourceT, SourceStorage> array;
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vtkmdiy::load(bb, array);
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obj = BaseType(array);
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}
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};
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template <typename TargetT, typename AH>
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struct Serialization<vtkm::cont::ArrayHandleCast<TargetT, AH>>
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: Serialization<vtkm::cont::ArrayHandle<
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TargetT,
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vtkm::cont::StorageTagCast<typename AH::ValueType, typename AH::StorageTag>>>
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{
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};
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} // diy
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/// @endcond SERIALIZATION
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#endif // vtk_m_cont_ArrayHandleCast_h
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