56 lines
1.5 KiB
C++
56 lines
1.5 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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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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// Callable<auto, const T&, Iter::reference> BinaryOperation>
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// requires HasAssign<T, BinaryOperation::result_type>
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// && CopyConstructible<BinaryOperation>
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// T
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// accumulate(Iter first, Iter last, T init, BinaryOperation binary_op);
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#include <numeric>
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#include <functional>
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#include <cassert>
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#include "../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, std::multiplies<T>()) == 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), 1, 1);
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test(Iter(ia), Iter(ia), 10, 10);
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test(Iter(ia), Iter(ia+1), 1, 1);
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test(Iter(ia), Iter(ia+1), 10, 10);
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test(Iter(ia), Iter(ia+2), 1, 2);
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test(Iter(ia), Iter(ia+2), 10, 20);
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test(Iter(ia), Iter(ia+sa), 1, 720);
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test(Iter(ia), Iter(ia+sa), 10, 7200);
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}
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int main()
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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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}
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