| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <numeric> |
| |
| // Became constexpr in C++20 |
| // template <InputIterator Iter1, InputIterator Iter2, MoveConstructible T> |
| // requires HasMultiply<Iter1::reference, Iter2::reference> |
| // && HasPlus<T, HasMultiply<Iter1::reference, Iter2::reference>::result_type> |
| // && HasAssign<T, |
| // HasPlus<T, |
| // HasMultiply<Iter1::reference, |
| // Iter2::reference>::result_type>::result_type> |
| // T |
| // inner_product(Iter1 first1, Iter1 last1, Iter2 first2, T init); |
| |
| #include <numeric> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| #include "test_iterators.h" |
| |
| template <class Iter1, class Iter2, class T> |
| TEST_CONSTEXPR_CXX20 void |
| test(Iter1 first1, Iter1 last1, Iter2 first2, T init, T x) |
| { |
| assert(std::inner_product(first1, last1, first2, init) == x); |
| } |
| |
| template <class Iter1, class Iter2> |
| TEST_CONSTEXPR_CXX20 void |
| test() |
| { |
| int a[] = {1, 2, 3, 4, 5, 6}; |
| int b[] = {6, 5, 4, 3, 2, 1}; |
| unsigned sa = sizeof(a) / sizeof(a[0]); |
| test(Iter1(a), Iter1(a), Iter2(b), 0, 0); |
| test(Iter1(a), Iter1(a), Iter2(b), 10, 10); |
| test(Iter1(a), Iter1(a+1), Iter2(b), 0, 6); |
| test(Iter1(a), Iter1(a+1), Iter2(b), 10, 16); |
| test(Iter1(a), Iter1(a+2), Iter2(b), 0, 16); |
| test(Iter1(a), Iter1(a+2), Iter2(b), 10, 26); |
| test(Iter1(a), Iter1(a+sa), Iter2(b), 0, 56); |
| test(Iter1(a), Iter1(a+sa), Iter2(b), 10, 66); |
| } |
| |
| TEST_CONSTEXPR_CXX20 bool |
| test() |
| { |
| test<cpp17_input_iterator<const int*>, cpp17_input_iterator<const int*> >(); |
| test<cpp17_input_iterator<const int*>, forward_iterator<const int*> >(); |
| test<cpp17_input_iterator<const int*>, bidirectional_iterator<const int*> >(); |
| test<cpp17_input_iterator<const int*>, random_access_iterator<const int*> >(); |
| test<cpp17_input_iterator<const int*>, const int*>(); |
| |
| test<forward_iterator<const int*>, cpp17_input_iterator<const int*> >(); |
| test<forward_iterator<const int*>, forward_iterator<const int*> >(); |
| test<forward_iterator<const int*>, bidirectional_iterator<const int*> >(); |
| test<forward_iterator<const int*>, random_access_iterator<const int*> >(); |
| test<forward_iterator<const int*>, const int*>(); |
| |
| test<bidirectional_iterator<const int*>, cpp17_input_iterator<const int*> >(); |
| test<bidirectional_iterator<const int*>, forward_iterator<const int*> >(); |
| test<bidirectional_iterator<const int*>, bidirectional_iterator<const int*> >(); |
| test<bidirectional_iterator<const int*>, random_access_iterator<const int*> >(); |
| test<bidirectional_iterator<const int*>, const int*>(); |
| |
| test<random_access_iterator<const int*>, cpp17_input_iterator<const int*> >(); |
| test<random_access_iterator<const int*>, forward_iterator<const int*> >(); |
| test<random_access_iterator<const int*>, bidirectional_iterator<const int*> >(); |
| test<random_access_iterator<const int*>, random_access_iterator<const int*> >(); |
| test<random_access_iterator<const int*>, const int*>(); |
| |
| test<const int*, cpp17_input_iterator<const int*> >(); |
| test<const int*, forward_iterator<const int*> >(); |
| test<const int*, bidirectional_iterator<const int*> >(); |
| test<const int*, random_access_iterator<const int*> >(); |
| test<const int*, const int*>(); |
| |
| return true; |
| } |
| |
| int main(int, char**) |
| { |
| test(); |
| #if TEST_STD_VER > 17 |
| static_assert(test()); |
| #endif |
| return 0; |
| } |