strided adaptor rewritten to correct defects and optimise performance.

test/adaptor_test/ticket_9519_strided_reversed.cpp

@@ -0,0 +1,67 @@
+// Boost.Range library
+//
+//  Copyright Neil Groves 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/
+//
+// Credit goes to Eric Niebler for providing an example to demonstrate this
+// issue. This has been trivially modified to create this test case.
+//
+#include <boost/range/adaptor/strided.hpp>
+#include <boost/range/adaptor/reversed.hpp>
+#include <boost/range/algorithm_ext/push_back.hpp>
+
+#include <boost/test/test_tools.hpp>
+#include <boost/test/unit_test.hpp>
+
+#include <list>
+#include <vector>
+#include <numeric>
+
+namespace boost
+{
+    namespace
+    {
+
+void ticket_9519_strided_reversed_test()
+{
+    using namespace boost::adaptors;
+
+    std::vector<int> vi;
+    for (int i = 0; i < 50; ++i)
+    {
+        vi.push_back(i);
+    }
+
+    std::vector<int> output;
+    boost::push_back(output, vi | strided(3) | reversed);
+
+    std::list<int> reference;
+    for (int i = 0; i < 50; i += 3)
+    {
+        reference.push_front(i);
+    }
+
+    BOOST_CHECK_EQUAL_COLLECTIONS(output.begin(), output.end(),
+                                  reference.begin(), reference.end());
+}
+
+    } // anonymous namespace
+} // namespace boost
+
+boost::unit_test::test_suite*
+init_unit_test_suite(int argc, char* argv[])
+{
+    boost::unit_test::test_suite* test
+        = BOOST_TEST_SUITE(
+            "RangeTestSuite.adaptor.ticket_9519_strided_reversed");
+
+    test->add(BOOST_TEST_CASE(&boost::ticket_9519_strided_reversed_test));
+
+    return test;
+}
+