Added make_tuple

[SVN r15052]

include/boost/python/detail/make_tuple.hpp

@@ -0,0 +1,31 @@
+# // 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.
+
+#if !defined(BOOST_PP_IS_ITERATING)
+# error Boost.Python - do not include this file!
+#endif
+
+#define N BOOST_PP_ITERATION()
+
+#define BOOST_PYTHON_MAKE_TUPLE_ARG(N, ignored)         \
+    PyTuple_SET_ITEM(                                   \
+        result.ptr()                                    \
+        , N                                             \
+        , python::incref(python::object(a##N).ptr())    \
+        );
+
+    template <BOOST_PYTHON_UNARY_ENUM(N, class A)>
+    tuple
+    make_tuple(BOOST_PYTHON_BINARY_ENUM(N, A, const& a))
+    {
+        tuple result((detail::new_reference)::PyTuple_New(N));
+        BOOST_PP_REPEAT(N, BOOST_PYTHON_MAKE_TUPLE_ARG, _)
+        return result;
+    }
+
+#undef BOOST_PYTHON_MAKE_TUPLE_ARG
+
+#undef N

include/boost/python/tuple.hpp

@@ -28,6 +28,11 @@ class tuple : public object
     static BOOST_PYTHON_DECL detail::new_reference call(object const&);
 };
 
+// for completeness
+inline tuple make_tuple() { return tuple(); }
+
+# define BOOST_PP_ITERATION_PARAMS_1 (3, (1, BOOST_PYTHON_MAX_ARITY, <boost/python/detail/make_tuple.hpp>))
+# include BOOST_PP_ITERATE()
 
 //
 // Converter Specializations