Added boost header

test/external/boost/python/converter/implicit.hpp

@@ -0,0 +1,46 @@
+// Copyright David Abrahams 2002.
+// 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)
+#ifndef IMPLICIT_DWA2002326_HPP
+# define IMPLICIT_DWA2002326_HPP
+
+# include <boost/python/converter/rvalue_from_python_data.hpp>
+# include <boost/python/converter/registrations.hpp>
+# include <boost/python/converter/registered.hpp>
+
+# include <boost/python/extract.hpp>
+
+namespace boost { namespace python { namespace converter { 
+
+template <class Source, class Target>
+struct implicit
+{
+    static void* convertible(PyObject* obj)
+    {
+        // Find a converter which can produce a Source instance from
+        // obj. The user has told us that Source can be converted to
+        // Target, and instantiating construct() below, ensures that
+        // at compile-time.
+        return implicit_rvalue_convertible_from_python(obj, registered<Source>::converters)
+            ? obj : 0;
+    }
+      
+    static void construct(PyObject* obj, rvalue_from_python_stage1_data* data)
+    {
+        void* storage = ((rvalue_from_python_storage<Target>*)data)->storage.bytes;
+
+        arg_from_python<Source> get_source(obj);
+        bool convertible = get_source.convertible();
+        BOOST_VERIFY(convertible);
+        
+        new (storage) Target(get_source());
+        
+        // record successful construction
+        data->convertible = storage;
+    }
+};
+
+}}} // namespace boost::python::converter
+
+#endif // IMPLICIT_DWA2002326_HPP