84 lines
3.1 KiB
C++
84 lines
3.1 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// <numeric>
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// Became constexpr in C++20
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// template <InputIterator InIter, OutputIterator<auto, const InIter::value_type&> OutIter>
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// requires HasPlus<InIter::value_type, InIter::reference>
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// && HasAssign<InIter::value_type,
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// HasPlus<InIter::value_type, InIter::reference>::result_type>
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// && Constructible<InIter::value_type, InIter::reference>
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// OutIter
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// partial_sum(InIter first, InIter last, OutIter result);
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#include <numeric>
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#include <cassert>
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#include "test_macros.h"
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#include "test_iterators.h"
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template <class InIter, class OutIter>
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TEST_CONSTEXPR_CXX20 void
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test()
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{
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int ia[] = {1, 2, 3, 4, 5};
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int ir[] = {1, 3, 6, 10, 15};
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const unsigned s = sizeof(ia) / sizeof(ia[0]);
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int ib[s] = {0};
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OutIter r = std::partial_sum(InIter(ia), InIter(ia+s), OutIter(ib));
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assert(base(r) == ib + s);
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for (unsigned i = 0; i < s; ++i)
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assert(ib[i] == ir[i]);
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}
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TEST_CONSTEXPR_CXX20 bool
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test()
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{
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test<cpp17_input_iterator<const int*>, cpp17_output_iterator<int*> >();
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test<cpp17_input_iterator<const int*>, forward_iterator<int*> >();
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test<cpp17_input_iterator<const int*>, bidirectional_iterator<int*> >();
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test<cpp17_input_iterator<const int*>, random_access_iterator<int*> >();
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test<cpp17_input_iterator<const int*>, int*>();
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test<forward_iterator<const int*>, cpp17_output_iterator<int*> >();
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test<forward_iterator<const int*>, forward_iterator<int*> >();
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test<forward_iterator<const int*>, bidirectional_iterator<int*> >();
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test<forward_iterator<const int*>, random_access_iterator<int*> >();
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test<forward_iterator<const int*>, int*>();
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test<bidirectional_iterator<const int*>, cpp17_output_iterator<int*> >();
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test<bidirectional_iterator<const int*>, forward_iterator<int*> >();
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test<bidirectional_iterator<const int*>, bidirectional_iterator<int*> >();
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test<bidirectional_iterator<const int*>, random_access_iterator<int*> >();
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test<bidirectional_iterator<const int*>, int*>();
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test<random_access_iterator<const int*>, cpp17_output_iterator<int*> >();
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test<random_access_iterator<const int*>, forward_iterator<int*> >();
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test<random_access_iterator<const int*>, bidirectional_iterator<int*> >();
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test<random_access_iterator<const int*>, random_access_iterator<int*> >();
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test<random_access_iterator<const int*>, int*>();
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test<const int*, cpp17_output_iterator<int*> >();
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test<const int*, forward_iterator<int*> >();
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test<const int*, bidirectional_iterator<int*> >();
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test<const int*, random_access_iterator<int*> >();
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test<const int*, int*>();
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return true;
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}
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int main(int, char**)
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{
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test();
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#if TEST_STD_VER > 17
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static_assert(test());
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#endif
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return 0;
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}
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