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accumulate algorithm and tests, flatten_view tweaks
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add_executable(accumulate accumulate.cpp) | ||
add_test(test.accumulate accumulate) |
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// Copyright Eric Niebler 2014. | ||
// | ||
// 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) | ||
// | ||
// For more information, see http://www.boost.org/libs/range/ | ||
// | ||
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//===----------------------------------------------------------------------===// | ||
// | ||
// 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. | ||
// | ||
//===----------------------------------------------------------------------===// | ||
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#include <range/v3/core.hpp> | ||
#include <range/v3/numeric.hpp> | ||
#include "../simple_test.hpp" | ||
#include "../test_iterators.hpp" | ||
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struct S | ||
{ | ||
int i; | ||
S add(int j) const | ||
{ | ||
return S{i + j}; | ||
} | ||
}; | ||
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template <class Iter, class Sent = Iter> | ||
void test() | ||
{ | ||
int ia[] = {1, 2, 3, 4, 5, 6}; | ||
constexpr unsigned 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); | ||
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using ranges::range; | ||
CHECK(ranges::accumulate(range(Iter(ia), Sent(ia)), 0) == 0); | ||
CHECK(ranges::accumulate(range(Iter(ia), Sent(ia)), 10) == 10); | ||
CHECK(ranges::accumulate(range(Iter(ia), Sent(ia+1)), 0) == 1); | ||
CHECK(ranges::accumulate(range(Iter(ia), Sent(ia+1)), 10) == 11); | ||
CHECK(ranges::accumulate(range(Iter(ia), Sent(ia+2)), 0) == 3); | ||
CHECK(ranges::accumulate(range(Iter(ia), Sent(ia+2)), 10) == 13); | ||
CHECK(ranges::accumulate(range(Iter(ia), Sent(ia+sc)), 0) == 21); | ||
CHECK(ranges::accumulate(range(Iter(ia), Sent(ia+sc)), 10) == 31); | ||
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CHECK(ranges::accumulate({1, 2, 3, 4, 5, 6}, 10) == 31); | ||
CHECK(ranges::accumulate({1, 2, 3, 4, 5, 6}, S{10}, &S::add).i == 31); | ||
} | ||
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int main() | ||
{ | ||
test<input_iterator<const int*> >(); | ||
test<forward_iterator<const int*> >(); | ||
test<bidirectional_iterator<const int*> >(); | ||
test<random_access_iterator<const int*> >(); | ||
test<const int*>(); | ||
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test<input_iterator<const int*>, sentinel<const int*> >(); | ||
test<forward_iterator<const int*>, sentinel<const int*> >(); | ||
test<bidirectional_iterator<const int*>, sentinel<const int*> >(); | ||
test<random_access_iterator<const int*>, sentinel<const int*> >(); | ||
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return ::test_result(); | ||
} |