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56 lines
1.5 KiB
C++
56 lines
1.5 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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// template <InputIterator Iter, MoveConstructible T>
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// requires HasPlus<T, Iter::reference>
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// && HasAssign<T, HasPlus<T, Iter::reference>::result_type>
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// T
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// accumulate(Iter first, Iter last, T init);
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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 Iter, class T>
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void
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test(Iter first, Iter last, T init, T x)
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{
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assert(std::accumulate(first, last, init) == x);
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}
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template <class Iter>
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void
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test()
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{
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int ia[] = {1, 2, 3, 4, 5, 6};
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unsigned sa = sizeof(ia) / sizeof(ia[0]);
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test(Iter(ia), Iter(ia), 0, 0);
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test(Iter(ia), Iter(ia), 10, 10);
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test(Iter(ia), Iter(ia+1), 0, 1);
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test(Iter(ia), Iter(ia+1), 10, 11);
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test(Iter(ia), Iter(ia+2), 0, 3);
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test(Iter(ia), Iter(ia+2), 10, 13);
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test(Iter(ia), Iter(ia+sa), 0, 21);
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test(Iter(ia), Iter(ia+sa), 10, 31);
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}
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int main(int, char**)
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{
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test<input_iterator<const int*> >();
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test<forward_iterator<const int*> >();
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test<bidirectional_iterator<const int*> >();
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test<random_access_iterator<const int*> >();
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test<const int*>();
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return 0;
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}
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