| // { dg-do run { target c++17 } } |
| |
| // Copyright (C) 2019-2021 Free Software Foundation, Inc. |
| // |
| // This file is part of the GNU ISO C++ Library. This library is free |
| // software; you can redistribute it and/or modify it under the |
| // terms of the GNU General Public License as published by the |
| // Free Software Foundation; either version 3, or (at your option) |
| // any later version. |
| |
| // This library is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| |
| // You should have received a copy of the GNU General Public License along |
| // with this library; see the file COPYING3. If not see |
| // <http://www.gnu.org/licenses/>. |
| |
| // C++17 29.8.5 [transform.reduce] |
| |
| #include <numeric> |
| #include <iterator> |
| #include <testsuite_hooks.h> |
| #include <testsuite_iterators.h> |
| |
| int a[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; |
| double b[] = {0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5}; |
| |
| using __gnu_test::test_container; |
| using __gnu_test::input_iterator_wrapper; |
| |
| /* |
| template<class InputIterator1, class InputIterator2, class T> |
| T transform_reduce(InputIterator1, InputIterator1, InputIterator2, T); |
| */ |
| void |
| test01() |
| { |
| auto res = std::transform_reduce(std::begin(a), std::end(a), std::begin(b), |
| 1.0f); |
| static_assert(std::is_same_v<decltype(res), float>); |
| VERIFY( res == (float)(1 + 0.5 + 1 + 1.5 + 2 + 2.5 + 3 + 3.5 + 4 + 4.5 + 5) ); |
| |
| test_container<int, input_iterator_wrapper> ca(a); |
| test_container<double, input_iterator_wrapper> cb(b); |
| |
| auto res2 = std::transform_reduce(ca.begin(), ca.end(), cb.begin(), |
| 1.0f); |
| static_assert(std::is_same_v<decltype(res2), float>); |
| VERIFY( res2 == res ); |
| } |
| |
| /* |
| template<class InputIterator1, class InputIterator2, class T, |
| class BinaryOperation1, class BinaryOperation2> |
| T transform_reduce(InputIterator1, InputIterator1, InputIterator2, T, |
| BinaryOperation1, BinaryOperation2); |
| */ |
| void |
| test02() |
| { |
| auto res = std::transform_reduce(std::begin(a), std::end(a), std::begin(b), |
| 1L, std::multiplies<>(), std::plus<int>()); |
| static_assert(std::is_same_v<decltype(res), long>); |
| VERIFY( res == (1L * 1 * 2 * 3 * 4 * 5 * 6 * 7 * 8 * 9 * 10) ); |
| |
| test_container<int, input_iterator_wrapper> ca(a); |
| test_container<double, input_iterator_wrapper> cb(b); |
| |
| auto res2 = std::transform_reduce(ca.begin(), ca.end(), cb.begin(), |
| 1L, std::multiplies<>(), std::plus<int>()); |
| static_assert(std::is_same_v<decltype(res2), long>); |
| VERIFY( res2 == res ); |
| } |
| |
| /* |
| template<class InputIterator, class T, class BinaryOperation, |
| class UnaryOperation> |
| T transform_reduce(InputIterator, InputIterator, T, |
| BinaryOperation, UnaryOperation); |
| */ |
| void |
| test03() |
| { |
| auto res = std::transform_reduce(std::begin(a), std::end(a), 10.0, |
| std::plus<>(), |
| [](int i) { return i * i; }); |
| static_assert(std::is_same_v<decltype(res), double>); |
| VERIFY( res == (10.0 + 1 + 4 + 9 + 16 + 25 + 36 + 49 + 64 + 81 + 100) ); |
| |
| test_container<int, input_iterator_wrapper> ca(a); |
| test_container<double, input_iterator_wrapper> cb(b); |
| |
| auto res2 = std::transform_reduce(ca.begin(), ca.end(), 10.0, |
| std::plus<>(), |
| [](int i) { return i * i; }); |
| static_assert(std::is_same_v<decltype(res2), double>); |
| VERIFY( res2 == (10.0 + 1 + 4 + 9 + 16 + 25 + 36 + 49 + 64 + 81 + 100) ); |
| } |
| |
| int |
| main() |
| { |
| test01(); |
| test02(); |
| test03(); |
| } |