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Telegram/ThirdParty/range-v3/test/numeric/accumulate.cpp

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+// Range v3 library
+//
+//  Copyright Eric Niebler 2014-present
+//
+//  Use, modification and distribution is subject to the
+//  Boost Software License, Version 1.0. (See accompanying
+//  file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//
+// Project home: https://github.com/ericniebler/range-v3
+//
+
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include <range/v3/core.hpp>
+#include <range/v3/numeric/accumulate.hpp>
+#include "../simple_test.hpp"
+#include "../test_iterators.hpp"
+
+struct S
+{
+    int i;
+    S add(int j) const
+    {
+        return S{i + j};
+    }
+};
+
+template<class Iter, class Sent = Iter>
+void test()
+{
+    int ia[] = {1, 2, 3, 4, 5, 6};
+    constexpr auto sc = ranges::size(ia);
+    CHECK(ranges::accumulate(Iter(ia), Sent(ia), 0) == 0);
+    CHECK(ranges::accumulate(Iter(ia), Sent(ia), 10) == 10);
+    CHECK(ranges::accumulate(Iter(ia), Sent(ia+1), 0) == 1);
+    CHECK(ranges::accumulate(Iter(ia), Sent(ia+1), 10) == 11);
+    CHECK(ranges::accumulate(Iter(ia), Sent(ia+2), 0) == 3);
+    CHECK(ranges::accumulate(Iter(ia), Sent(ia+2), 10) == 13);
+    CHECK(ranges::accumulate(Iter(ia), Sent(ia+sc), 0) == 21);
+    CHECK(ranges::accumulate(Iter(ia), Sent(ia+sc), 10) == 31);
+
+    using ranges::make_subrange;
+    CHECK(ranges::accumulate(make_subrange(Iter(ia), Sent(ia)), 0) == 0);
+    CHECK(ranges::accumulate(make_subrange(Iter(ia), Sent(ia)), 10) == 10);
+    CHECK(ranges::accumulate(make_subrange(Iter(ia), Sent(ia+1)), 0) == 1);
+    CHECK(ranges::accumulate(make_subrange(Iter(ia), Sent(ia+1)), 10) == 11);
+    CHECK(ranges::accumulate(make_subrange(Iter(ia), Sent(ia+2)), 0) == 3);
+    CHECK(ranges::accumulate(make_subrange(Iter(ia), Sent(ia+2)), 10) == 13);
+    CHECK(ranges::accumulate(make_subrange(Iter(ia), Sent(ia+sc)), 0) == 21);
+    CHECK(ranges::accumulate(make_subrange(Iter(ia), Sent(ia+sc)), 10) == 31);
+}
+
+int main()
+{
+    test<InputIterator<const int*> >();
+    test<ForwardIterator<const int*> >();
+    test<BidirectionalIterator<const int*> >();
+    test<RandomAccessIterator<const int*> >();
+    test<const int*>();
+
+    test<InputIterator<const int*>, Sentinel<const int*> >();
+    test<ForwardIterator<const int*>, Sentinel<const int*> >();
+    test<BidirectionalIterator<const int*>, Sentinel<const int*> >();
+    test<RandomAccessIterator<const int*>, Sentinel<const int*> >();
+
+    return ::test_result();
+}