f53cd748f3
These structs behave much like Vec except that they work on a short C array given to them rather than having the statically sized short array defined within. I expect to use this in the short term to help implement cell face classes, but there are probably many other uses.
218 lines
7.1 KiB
C++
218 lines
7.1 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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// 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 2014 Sandia Corporation.
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// Copyright 2014 UT-Battelle, LLC.
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// Copyright 2014 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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//
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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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#ifndef vtkm_testing_VecTraitsTest_h
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#define vtkm_testing_VecTraitsTest_h
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#include <vtkm/VecTraits.h>
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#include <vtkm/TypeTraits.h>
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#include <vtkm/testing/Testing.h>
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namespace vtkm {
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namespace testing {
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namespace detail {
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inline void CompareDimensionalityTags(vtkm::TypeTraitsScalarTag,
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vtkm::VecTraitsTagSingleComponent)
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{
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// If we are here, everything is fine.
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}
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inline void CompareDimensionalityTags(vtkm::TypeTraitsVectorTag,
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vtkm::VecTraitsTagMultipleComponents)
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{
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// If we are here, everything is fine.
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}
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template<vtkm::IdComponent NUM_COMPONENTS, typename T>
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inline void CheckIsStatic(const T &, vtkm::VecTraitsTagSizeStatic)
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{
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VTKM_TEST_ASSERT(vtkm::VecTraits<T>::NUM_COMPONENTS == NUM_COMPONENTS,
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"Traits returns unexpected number of components");
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}
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template<vtkm::IdComponent NUM_COMPONENTS, typename T>
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inline void CheckIsStatic(const T &, vtkm::VecTraitsTagSizeVariable)
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{
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// If we are here, everything is fine.
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}
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template<typename VecType>
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struct VecIsWritable
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{
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using type = std::true_type;
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};
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template<typename ComponentType>
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struct VecIsWritable<vtkm::VecCConst<ComponentType> >
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{
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using type = std::false_type;
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};
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// Part of TestVecTypeImpl that writes to the Vec type
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template <vtkm::IdComponent NUM_COMPONENTS, typename T, typename VecCopyType>
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static void TestVecTypeWritableImpl(const T &inVector,
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const VecCopyType &vectorCopy,
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T &outVector,
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std::true_type)
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{
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using Traits = vtkm::VecTraits<T>;
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using ComponentType = typename Traits::ComponentType;
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{
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const ComponentType multiplier = 4;
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for (vtkm::IdComponent i = 0; i < NUM_COMPONENTS; i++)
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{
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Traits::SetComponent(outVector,
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i,
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ComponentType(
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multiplier*Traits::GetComponent(inVector, i)));
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}
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vtkm::Vec<ComponentType,NUM_COMPONENTS> resultCopy;
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Traits::CopyInto(outVector, resultCopy);
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VTKM_TEST_ASSERT(test_equal(resultCopy, multiplier*vectorCopy),
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"Got bad result for scalar multiple");
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}
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{
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const ComponentType multiplier = 7;
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for (vtkm::IdComponent i = 0; i < NUM_COMPONENTS; i++)
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{
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Traits::GetComponent(outVector, i)
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= ComponentType(multiplier * Traits::GetComponent(inVector, i));
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}
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vtkm::Vec<ComponentType,NUM_COMPONENTS> resultCopy;
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Traits::CopyInto(outVector, resultCopy);
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VTKM_TEST_ASSERT(test_equal(resultCopy, multiplier*vectorCopy),
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"Got bad result for scalar multiple");
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}
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}
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template <vtkm::IdComponent NUM_COMPONENTS, typename T, typename VecCopyType>
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static void TestVecTypeWritableImpl(const T &vtkmNotUsed(inVector),
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const VecCopyType &vtkmNotUsed(vectorCopy),
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T &vtkmNotUsed(outVector),
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std::false_type)
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{
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// Skip writable functionality.
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}
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/// Compares some manual arithmetic through type traits to arithmetic with
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/// the Tuple class.
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template <vtkm::IdComponent NUM_COMPONENTS, typename T>
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static void TestVecTypeImpl(
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const typename std::remove_const<T>::type &inVector,
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typename std::remove_const<T>::type &outVector)
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{
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using Traits = vtkm::VecTraits<T>;
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using ComponentType = typename Traits::ComponentType;
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using NonConstT = typename std::remove_const<T>::type;
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CheckIsStatic<NUM_COMPONENTS>(inVector, typename Traits::IsSizeStatic());
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VTKM_TEST_ASSERT(Traits::GetNumberOfComponents(inVector) == NUM_COMPONENTS,
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"Traits returned wrong number of components.");
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vtkm::Vec<ComponentType,NUM_COMPONENTS> vectorCopy;
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Traits::CopyInto(inVector, vectorCopy);
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VTKM_TEST_ASSERT(test_equal(vectorCopy, inVector), "CopyInto does not work.");
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{
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ComponentType result = 0;
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for (vtkm::IdComponent i = 0; i < NUM_COMPONENTS; i++)
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{
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ComponentType component
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= Traits::GetComponent(inVector, i);
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result = ComponentType(result + (component * component));
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}
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VTKM_TEST_ASSERT(
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test_equal(result, vtkm::dot(vectorCopy, vectorCopy)),
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"Got bad result for dot product");
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}
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// This will fail to compile if the tags are wrong.
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detail::CompareDimensionalityTags(
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typename vtkm::TypeTraits<T>::DimensionalityTag(),
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typename vtkm::VecTraits<T>::HasMultipleComponents());
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TestVecTypeWritableImpl<NUM_COMPONENTS,NonConstT>(
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inVector,
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vectorCopy,
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outVector,
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typename VecIsWritable<NonConstT>::type());
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}
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inline void CheckVecComponentsTag(vtkm::VecTraitsTagMultipleComponents)
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{
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// If we are running here, everything is fine.
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}
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} // namespace detail
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/// Checks to make sure that the HasMultipleComponents tag is actually for
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/// multiple components. Should only be called for vector classes that actually
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/// have multiple components.
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///
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template<class T>
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inline void TestVecComponentsTag()
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{
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// This will fail to compile if the tag is wrong
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// (i.e. not vtkm::VecTraitsTagMultipleComponents)
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detail::CheckVecComponentsTag(
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typename vtkm::VecTraits<T>::HasMultipleComponents());
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}
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namespace detail {
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inline void CheckScalarComponentsTag(vtkm::VecTraitsTagSingleComponent)
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{
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// If we are running here, everything is fine.
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}
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} // namespace detail
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/// Compares some manual arithmetic through type traits to arithmetic with
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/// the Tuple class.
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template <vtkm::IdComponent NUM_COMPONENTS, typename T>
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static void TestVecType(const T &inVector, T &outVector)
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{
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detail::TestVecTypeImpl<NUM_COMPONENTS, T>(inVector, outVector);
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detail::TestVecTypeImpl<NUM_COMPONENTS, const T>(inVector, outVector);
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}
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/// Checks to make sure that the HasMultipleComponents tag is actually for a
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/// single component. Should only be called for "vector" classes that actually
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/// have only a single component (that is, are really scalars).
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///
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template<class T>
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inline void TestScalarComponentsTag()
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{
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// This will fail to compile if the tag is wrong
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// (i.e. not vtkm::VecTraitsTagSingleComponent)
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detail::CheckScalarComponentsTag(
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typename vtkm::VecTraits<T>::HasMultipleComponents());
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}
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}
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} // namespace vtkm::testing
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#endif //vtkm_testing_VecTraitsTest_h
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