NULL shared_ptr conversions, more tests for custom to-python shared_ptr registrations

[SVN r18263]

test/opaque.cpp

@@ -0,0 +1,75 @@
+// Copyright David Abrahams and Gottfried Ganssauge 2003. 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/return_opaque_pointer.hpp>
+# include <boost/python/def.hpp>
+# include <boost/python/module.hpp>
+# include <boost/python/return_value_policy.hpp>
+
+typedef struct opaque_ *opaque;
+typedef struct opaque2_ *opaque2;
+
+opaque the_op   = ((opaque) 0x47110815);
+opaque2 the_op2 = ((opaque2) 0x08154711);
+
+opaque get() { return the_op; }
+
+void use(opaque op)
+{
+    if (op != the_op)
+        throw std::runtime_error (std::string ("failed"));
+}
+
+int useany(opaque op)
+{
+    return op ? 1 : 0;
+}
+
+opaque getnull()
+{
+    return 0;
+}
+
+void failuse (opaque op)
+{
+    if (op == the_op)
+        throw std::runtime_error (std::string ("success"));
+}
+
+opaque2 get2 () { return the_op2; }
+
+void use2 (opaque2 op)
+{
+    if (op != the_op2)
+        throw std::runtime_error (std::string ("failed"));
+}
+
+void failuse2 (opaque2 op)
+{
+    if (op == the_op2)
+        throw std::runtime_error (std::string ("success"));
+}
+
+BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID(opaque_)
+BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID(opaque2_)
+
+namespace bpl = boost::python;
+
+BOOST_PYTHON_MODULE(opaque_ext)
+{
+    bpl::def (
+        "get", &::get, bpl::return_value_policy<bpl::return_opaque_pointer>());
+    bpl::def ("use", &::use);
+    bpl::def ("useany", &::useany);
+    bpl::def ("getnull", &::getnull, bpl::return_value_policy<bpl::return_opaque_pointer>());
+    bpl::def ("failuse", &::failuse);
+
+    bpl::def (
+        "get2",
+        &::get2,
+        bpl::return_value_policy<bpl::return_opaque_pointer>());
+    bpl::def ("use2", &::use2);
+    bpl::def ("failuse2", &::failuse2);
+}