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// { dg-options "-std=gnu++17" }
// { dg-do run { target c++17 } }
// Copyright (C) 2019 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 29.8.3 [reduce]
#include <numeric>
#include <iterator>
#include <testsuite_hooks.h>
#include <testsuite_iterators.h>
/*
template<class InputIterator>
iterator_traits<InputIterator>::value_type
reduce(InputIterator, InputIterator);
*/
void
test01()
{
using __gnu_test::test_container;
using __gnu_test::input_iterator_wrapper;
int array[5] = { 1, 2, 3, 4, 5 };
test_container<int, input_iterator_wrapper> con(array);
int res = std::reduce(con.begin(), con.end());
VERIFY( res == 15 );
}
/*
template<class InputIterator, class T>
T reduce(InputIterator, InputIterator, T);
*/
void
test02()
{
bool b[] = {true, false, true, true, false, true, false, true, true, false};
int res = std::reduce(std::begin(b), std::end(b), 100);
VERIFY( res == 106 );
}
/*
template<class InputIterator, class T>
T reduce(InputIterator, InputIterator, T);
template<class InputIterator, class T, class BinaryOperation>
T reduce(InputIterator, InputIterator, T, BinaryOperation);
*/
void
test03()
{
int a[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
auto res = std::reduce(std::begin(a), std::end(a), (short)11);
static_assert(std::is_same_v<decltype(res), short>);
VERIFY( res == 66 );
auto res2 = std::reduce(std::begin(a), std::end(a), -1l, std::multiplies<>());
static_assert(std::is_same_v<decltype(res2), long>);
VERIFY( res2 == -3628800 );
}
int
main()
{
test01();
test02();
test03();
}
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