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Merge topic 'fix-iterator-operator'
09c0139b4 Fix operator for IteratorFromArrayPortal Acked-by: Kitware Robot <kwrobot@kitware.com> Acked-by: Li-Ta Lo <ollie@lanl.gov> Merge-request: !3035
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docs/changelog/fix-iterator-operator.md
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docs/changelog/fix-iterator-operator.md
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# Fixed operator for IteratorFromArrayPortal
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There was an error in `operator-=` for `IteratorFromArrayPortal` that went
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by unnoticed. The operator is fixed and regression tests for the operators
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has been added.
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@ -98,7 +98,7 @@ public:
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VTKM_EXEC_CONT
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iter& operator-=(difference_type n)
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{
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this->Index += static_cast<vtkm::Id>(n);
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this->Index -= static_cast<vtkm::Id>(n);
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VTKM_ASSERT(this->Index >= 0);
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return *this;
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}
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@ -11,6 +11,7 @@
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#include <vtkm/cont/internal/IteratorFromArrayPortal.h>
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#include <vtkm/VecTraits.h>
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#include <vtkm/cont/ArrayHandleImplicit.h>
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#include <vtkm/cont/internal/ArrayPortalFromIterators.h>
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#include <vtkm/cont/testing/Testing.h>
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@ -115,6 +116,74 @@ struct TemplatedTests
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"Did not get correct values when writing to iterator.");
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}
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void TestOperators()
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{
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struct Functor
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{
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VTKM_EXEC ValueType operator()(vtkm::Id index) const { return TestValue(index, ValueType{}); }
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};
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Functor functor;
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auto array = vtkm::cont::make_ArrayHandleImplicit(functor, ARRAY_SIZE);
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auto portal = array.ReadPortal();
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VTKM_TEST_ASSERT(test_equal(portal.Get(0), functor(0)));
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::CheckPortal(portal);
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// Normally, you would use `ArrayPortalToIterators`, but we want to test this
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// class specifically.
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using IteratorType = vtkm::cont::internal::IteratorFromArrayPortal<decltype(portal)>;
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IteratorType begin{ portal };
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IteratorType end{ portal, ARRAY_SIZE };
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VTKM_TEST_ASSERT(test_equal(*begin, functor(0)));
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VTKM_TEST_ASSERT(test_equal(begin[0], functor(0)));
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VTKM_TEST_ASSERT(test_equal(begin[3], functor(3)));
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IteratorType iter = begin;
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VTKM_TEST_ASSERT(test_equal(*iter, functor(0)));
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VTKM_TEST_ASSERT(test_equal(*(iter++), functor(0)));
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VTKM_TEST_ASSERT(test_equal(*iter, functor(1)));
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VTKM_TEST_ASSERT(test_equal(*(++iter), functor(2)));
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VTKM_TEST_ASSERT(test_equal(*iter, functor(2)));
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VTKM_TEST_ASSERT(test_equal(*(iter--), functor(2)));
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VTKM_TEST_ASSERT(test_equal(*iter, functor(1)));
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VTKM_TEST_ASSERT(test_equal(*(--iter), functor(0)));
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VTKM_TEST_ASSERT(test_equal(*iter, functor(0)));
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VTKM_TEST_ASSERT(test_equal(*(iter += 3), functor(3)));
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VTKM_TEST_ASSERT(test_equal(*(iter -= 3), functor(0)));
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VTKM_TEST_ASSERT(end - begin == ARRAY_SIZE);
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VTKM_TEST_ASSERT(test_equal(*(iter + 3), functor(3)));
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VTKM_TEST_ASSERT(test_equal(*(3 + iter), functor(3)));
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iter += 3;
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VTKM_TEST_ASSERT(test_equal(*(iter - 3), functor(0)));
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VTKM_TEST_ASSERT(iter == (begin + 3));
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VTKM_TEST_ASSERT(!(iter != (begin + 3)));
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VTKM_TEST_ASSERT(iter != begin);
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VTKM_TEST_ASSERT(!(iter == begin));
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VTKM_TEST_ASSERT(!(iter < begin));
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VTKM_TEST_ASSERT(!(iter < (begin + 3)));
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VTKM_TEST_ASSERT((iter < end));
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VTKM_TEST_ASSERT(!(iter <= begin));
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VTKM_TEST_ASSERT((iter <= (begin + 3)));
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VTKM_TEST_ASSERT((iter <= end));
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VTKM_TEST_ASSERT((iter > begin));
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VTKM_TEST_ASSERT(!(iter > (begin + 3)));
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VTKM_TEST_ASSERT(!(iter > end));
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VTKM_TEST_ASSERT((iter >= begin));
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VTKM_TEST_ASSERT((iter >= (begin + 3)));
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VTKM_TEST_ASSERT(!(iter >= end));
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}
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void operator()()
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{
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ValueType array[ARRAY_SIZE];
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@ -133,6 +202,9 @@ struct TemplatedTests
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std::cout << " Test write to iterator." << std::endl;
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TestIteratorWrite(portal);
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std::cout << " Test operators." << std::endl;
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TestOperators();
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}
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};
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