84 lines · cpp
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9// <numeric>10 11// Became constexpr in C++2012// template <InputIterator InIter, OutputIterator<auto, const InIter::value_type&> OutIter>13// requires HasPlus<InIter::value_type, InIter::reference>14// && HasAssign<InIter::value_type,15// HasPlus<InIter::value_type, InIter::reference>::result_type>16// && Constructible<InIter::value_type, InIter::reference>17// OutIter18// partial_sum(InIter first, InIter last, OutIter result);19 20#include <numeric>21#include <cassert>22 23#include "test_macros.h"24#include "test_iterators.h"25 26template <class InIter, class OutIter>27TEST_CONSTEXPR_CXX20 void28test()29{30 int ia[] = {1, 2, 3, 4, 5};31 int ir[] = {1, 3, 6, 10, 15};32 const unsigned s = sizeof(ia) / sizeof(ia[0]);33 int ib[s] = {0};34 OutIter r = std::partial_sum(InIter(ia), InIter(ia+s), OutIter(ib));35 assert(base(r) == ib + s);36 for (unsigned i = 0; i < s; ++i)37 assert(ib[i] == ir[i]);38}39 40TEST_CONSTEXPR_CXX20 bool41test()42{43 test<cpp17_input_iterator<const int*>, cpp17_output_iterator<int*> >();44 test<cpp17_input_iterator<const int*>, forward_iterator<int*> >();45 test<cpp17_input_iterator<const int*>, bidirectional_iterator<int*> >();46 test<cpp17_input_iterator<const int*>, random_access_iterator<int*> >();47 test<cpp17_input_iterator<const int*>, int*>();48 49 test<forward_iterator<const int*>, cpp17_output_iterator<int*> >();50 test<forward_iterator<const int*>, forward_iterator<int*> >();51 test<forward_iterator<const int*>, bidirectional_iterator<int*> >();52 test<forward_iterator<const int*>, random_access_iterator<int*> >();53 test<forward_iterator<const int*>, int*>();54 55 test<bidirectional_iterator<const int*>, cpp17_output_iterator<int*> >();56 test<bidirectional_iterator<const int*>, forward_iterator<int*> >();57 test<bidirectional_iterator<const int*>, bidirectional_iterator<int*> >();58 test<bidirectional_iterator<const int*>, random_access_iterator<int*> >();59 test<bidirectional_iterator<const int*>, int*>();60 61 test<random_access_iterator<const int*>, cpp17_output_iterator<int*> >();62 test<random_access_iterator<const int*>, forward_iterator<int*> >();63 test<random_access_iterator<const int*>, bidirectional_iterator<int*> >();64 test<random_access_iterator<const int*>, random_access_iterator<int*> >();65 test<random_access_iterator<const int*>, int*>();66 67 test<const int*, cpp17_output_iterator<int*> >();68 test<const int*, forward_iterator<int*> >();69 test<const int*, bidirectional_iterator<int*> >();70 test<const int*, random_access_iterator<int*> >();71 test<const int*, int*>();72 73 return true;74}75 76int main(int, char**)77{78 test();79#if TEST_STD_VER > 1780 static_assert(test());81#endif82 return 0;83}84