[DEV] add v1.66.0

libs/dll/example/tutorial8/refcounting_plugin.cpp

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+// Copyright 2014 Renato Tegon Forti, Antony Polukhin.
+// Copyright 2015-2017 Antony Polukhin.
+//
+// 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)
+
+// MinGW related workaround
+#define BOOST_DLL_FORCE_ALIAS_INSTANTIATION
+
+//[plugcpp_my_plugin_refcounting
+#include "refcounting_plugin.hpp"
+#include <boost/dll/runtime_symbol_info.hpp> // for this_line_location()
+
+namespace my_namespace {
+
+class my_plugin_refcounting : public my_refcounting_api {
+public:    
+    // Must be instantiated in plugin
+    boost::filesystem::path location() const {
+        return boost::dll::this_line_location(); // location of this plugin
+    }
+
+    std::string name() const {
+        return "refcounting";
+    }
+
+    // ...
+    //<-
+    // This block is invisible for Quickbook documentation
+    float calculate(float /*x*/, float /*y*/) {
+        return 0;
+    }
+    //->
+};
+
+} // namespace my_namespace
+
+// Factory method. Returns *simple pointer*!
+my_refcounting_api* create() {
+    return new my_namespace::my_plugin_refcounting();
+}
+
+//]
+
+
+