Integrate and adapt "devector's", from Thaler Benedek's implementation.

test/explicit_inst_devector_test.cpp

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+//////////////////////////////////////////////////////////////////////////////
+//
+// \(C\) Copyright Benedek Thaler 2015-2016
+// \(C\) Copyright Ion Gaztanaga 2019-2020. 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)
+//
+// See http://www.boost.org/libs/container for documentation.
+//
+//////////////////////////////////////////////////////////////////////////////
+
+#include <boost/container/devector.hpp>
+#include "movable_int.hpp"
+
+struct empty
+{
+   friend bool operator == (const empty &, const empty &){ return true; }
+   friend bool operator <  (const empty &, const empty &){ return true; }
+};
+
+template class ::boost::container::devector<empty>;
+
+namespace boost {
+namespace container {
+
+//Test stored_size option
+template class devector< test::movable_and_copyable_int
+                       , new_allocator<test::movable_and_copyable_int>
+                       , devector_options< stored_size<unsigned short> >::type
+                       >;
+
+
+}  //namespace container {
+}  //namespace boost {
+
+int main()
+{
+   ::boost::container::devector<empty> dummy;
+   (void)dummy;
+   return 0;
+}