implicit conversions

[SVN r13277]

test/implicit.cpp

@@ -0,0 +1,37 @@
+// Copyright David Abrahams 2002. Permission to copy, use,
+// modify, sell and distribute this software is granted provided this
+// copyright notice appears in all copies. This software is provided
+// "as is" without express or implied warranty, and with no claim as
+// to its suitability for any purpose.
+#include <boost/python/class.hpp>
+#include <boost/python/implicit.hpp>
+#include <boost/python/module.hpp>
+#include "test_class.hpp"
+
+// This test shows that a class can be wrapped "as itself" but also
+// acquire a back-reference iff has_back_reference<> is appropriately
+// specialized.
+using namespace boost::python;
+
+typedef test_class<> X;
+
+int x_value(X const& x)
+{
+    return x.value();
+}
+
+BOOST_PYTHON_MODULE_INIT(implicit_ext)
+{
+    implicitly_convertible<int,X>();
+    module("implicit_ext")
+        .def("x_value", x_value)
+        .add(
+            class_<X>("X")
+            .def_init(args<int>())
+            .def("value", &X::value)
+            .def("set", &X::set)
+            )
+        ;
+}
+
+#include "module_tail.cpp"