mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-16 17:22:55 +00:00
ac889b5004
The `VecTraits` class allows templated functions, methods, and classes to treat type arguments uniformly as `Vec` types or to otherwise differentiate between scalar and vector types. This only works for types that `VecTraits` is defined for. The `VecTraits` templated class now has a default implementation that will be used for any type that does not have a `VecTraits` specialization. This removes many surprise compiler errors when using a template that, unknown to you, has `VecTraits` in its implementation. One potential issue is that if `VecTraits` gets defined for a new type, the behavior of `VecTraits` could change for that type in backward-incompatible ways. If `VecTraits` is used in a purely generic way, this should not be an issue. However, if assumptions were made about the components and length, this could cause problems. Fixes #589
84 lines
2.8 KiB
C++
84 lines
2.8 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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#include <vtkm/testing/VecTraitsTests.h>
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#include <vtkm/testing/Testing.h>
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namespace
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{
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static constexpr vtkm::Id MAX_VECTOR_SIZE = 5;
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static constexpr vtkm::Id VecInit[MAX_VECTOR_SIZE] = { 42, 54, 67, 12, 78 };
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struct TypeWithoutVecTraits
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{
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vtkm::Id Value = -1;
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TypeWithoutVecTraits() = default;
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TypeWithoutVecTraits(vtkm::Id value)
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: Value(value)
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{
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}
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operator vtkm::Id() const { return this->Value; }
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};
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struct TestVecTypeFunctor
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{
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template <typename T>
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void operator()(const T&) const
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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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VTKM_TEST_ASSERT(Traits::NUM_COMPONENTS <= MAX_VECTOR_SIZE,
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"Need to update test for larger vectors.");
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T inVector;
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for (vtkm::IdComponent index = 0; index < Traits::NUM_COMPONENTS; index++)
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{
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Traits::SetComponent(inVector, index, ComponentType(VecInit[index]));
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}
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T outVector;
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vtkm::testing::TestVecType<Traits::NUM_COMPONENTS>(inVector, outVector);
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vtkm::VecC<ComponentType> outVecC(outVector);
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vtkm::testing::TestVecType<Traits::NUM_COMPONENTS>(vtkm::VecC<ComponentType>(inVector),
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outVecC);
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vtkm::VecCConst<ComponentType> outVecCConst(outVector);
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vtkm::testing::TestVecType<Traits::NUM_COMPONENTS>(vtkm::VecCConst<ComponentType>(inVector),
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outVecCConst);
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}
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};
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void TestVecTraits()
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{
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TestVecTypeFunctor test;
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vtkm::testing::Testing::TryTypes(test);
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std::cout << "vtkm::Vec<vtkm::FloatDefault, 5>" << std::endl;
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test(vtkm::Vec<vtkm::FloatDefault, 5>());
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std::cout << "TypeWithoutVecTraits" << std::endl;
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test(TypeWithoutVecTraits{});
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vtkm::testing::TestVecComponentsTag<vtkm::Id3>();
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vtkm::testing::TestVecComponentsTag<vtkm::Vec3f>();
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vtkm::testing::TestVecComponentsTag<vtkm::Vec4f>();
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vtkm::testing::TestVecComponentsTag<vtkm::VecC<vtkm::FloatDefault>>();
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vtkm::testing::TestVecComponentsTag<vtkm::VecCConst<vtkm::Id>>();
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vtkm::testing::TestScalarComponentsTag<vtkm::Id>();
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vtkm::testing::TestScalarComponentsTag<vtkm::FloatDefault>();
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vtkm::testing::TestScalarComponentsTag<TypeWithoutVecTraits>();
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}
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} // anonymous namespace
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int UnitTestVecTraits(int argc, char* argv[])
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{
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return vtkm::testing::Testing::Run(TestVecTraits, argc, argv);
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}
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