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Telegram/ThirdParty/range-v3/test/action/stride.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)
+
+#include <array>
+#include <vector>
+#include <range/v3/core.hpp>
+#include <range/v3/view/iota.hpp>
+#include <range/v3/algorithm/copy.hpp>
+#include <range/v3/algorithm/move.hpp>
+#include <range/v3/algorithm/equal.hpp>
+#include <range/v3/action/stride.hpp>
+#include "../simple_test.hpp"
+#include "../test_utils.hpp"
+
+int main()
+{
+    using namespace ranges;
+
+    auto v = views::ints(0,100) | to<std::vector>();
+
+    auto v2 = v | copy | actions::stride(10);
+    CHECK(size(v2) == 10u);
+    CPP_assert(same_as<decltype(v), decltype(v2)>);
+    ::check_equal(v2, {0,10,20,30,40,50,60,70,80,90});
+
+    v2 = v2 | move | actions::stride(4);
+    ::check_equal(v2, {0,40,80});
+
+    v2 |= actions::stride(2);
+    ::check_equal(v2, {0,80});
+    v2 |= actions::stride(1);
+    ::check_equal(v2, {0,80});
+    v2 |= actions::stride(10);
+    ::check_equal(v2, {0});
+
+    auto & v3 = actions::stride(v, 30);
+    CHECK(&v3 == &v);
+    ::check_equal(v, {0,30,60,90});
+
+    return ::test_result();
+}