Added test for #176

test/Jamfile

@@ -237,6 +237,7 @@ project
     [ run sequence/ref_vector.cpp ]
     [ run sequence/flatten_view.cpp ]
     [ compile sequence/github-159.cpp ]
+    [ run sequence/github-176.cpp ]
 
     [ compile sequence/size.cpp ]
 

test/sequence/github-176.cpp

@@ -0,0 +1,50 @@
+/*=============================================================================
+    Copyright (c) 2018 Kohei Takahashi
+
+    Distributed under 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 <boost/fusion/sequence/intrinsic/at.hpp>
+#include <boost/fusion/container/vector.hpp>
+#include <boost/fusion/container/list.hpp>
+#include <boost/fusion/container/deque.hpp>
+#include <boost/fusion/tuple/tuple.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+template <typename Sequence>
+void test_at()
+{
+    Sequence seq;
+
+    // zero initialized
+    BOOST_TEST(boost::fusion::at_c<0>(seq)[0] == 0);
+    BOOST_TEST(boost::fusion::at_c<0>(seq)[1] == 0);
+    BOOST_TEST(boost::fusion::at_c<0>(seq)[2] == 0);
+
+    int (&arr)[3] = boost::fusion::deref(boost::fusion::begin(seq));
+
+    arr[0] = 2;
+    arr[1] = 4;
+    arr[2] = 6;
+
+    BOOST_TEST(boost::fusion::at_c<0>(seq)[0] == 2);
+    BOOST_TEST(boost::fusion::at_c<0>(seq)[1] == 4);
+    BOOST_TEST(boost::fusion::at_c<0>(seq)[2] == 6);
+
+    boost::fusion::at_c<0>(seq)[1] = 42;
+
+    BOOST_TEST(boost::fusion::at_c<0>(seq)[0] == 2);
+    BOOST_TEST(boost::fusion::at_c<0>(seq)[1] == 42);
+    BOOST_TEST(boost::fusion::at_c<0>(seq)[2] == 6);
+}
+
+int main()
+{
+    using namespace boost::fusion;
+
+    test_at<vector<int[3]> >();
+    test_at<deque<int[3]> >();
+    test_at<list<int[3]> >();
+    test_at<tuple<int[3]> >();
+}