coroutine: activate new interface V2

[SVN r84428]

example/unwind.cpp

@@ -10,6 +10,40 @@
 #include <boost/bind.hpp>
 #include <boost/coroutine/all.hpp>
 
+#ifdef BOOST_COROUTINES_V2
+struct X : private boost::noncopyable
+{
+    X() { std::cout << "X()" << std::endl; }
+    ~X() { std::cout << "~X()" << std::endl; }
+};
+
+void fn( boost::coroutines::push_coroutine< void > & c)
+{
+    X x;
+    int i = 0;
+    while ( true)
+    {
+        std::cout << "fn() : " << ++i << std::endl;
+        c();
+    }
+}
+
+int main( int argc, char * argv[])
+{
+    {
+        boost::coroutines::pull_coroutine< void > c( fn);
+        for ( int k = 0; k < 3; ++k)
+        {
+            c();
+        }
+        std::cout << "destroying coroutine and unwinding stack" << std::endl;
+    }
+
+    std::cout << "\nDone" << std::endl;
+
+    return EXIT_SUCCESS;
+}
+#else
 typedef boost::coroutines::coroutine< void() >   coro_t;
 
 struct X : private boost::noncopyable
@@ -44,3 +78,4 @@ int main( int argc, char * argv[])
 
     return EXIT_SUCCESS;
 }
+#endif