Imported existing code

libraries/include/boost/python/detail/invoke.hpp

@@ -0,0 +1,100 @@
+#if !defined(BOOST_PP_IS_ITERATING)
+
+// 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 INVOKE_DWA20021122_HPP
+#  define INVOKE_DWA20021122_HPP
+
+#  include <boost/python/detail/prefix.hpp>
+#  include <boost/python/detail/preprocessor.hpp>
+#  include <boost/python/detail/none.hpp>
+
+#  include <boost/type_traits/is_member_function_pointer.hpp>
+
+#  include <boost/preprocessor/iterate.hpp>
+#  include <boost/preprocessor/facilities/intercept.hpp>
+#  include <boost/preprocessor/repetition/enum_trailing_params.hpp>
+#  include <boost/preprocessor/repetition/enum_trailing_binary_params.hpp>
+#  include <boost/preprocessor/repetition/enum_binary_params.hpp>
+#  include <boost/python/to_python_value.hpp>
+
+// This file declares a series of overloaded invoke(...)  functions,
+// used to invoke wrapped C++ function (object)s from Python. Each one
+// accepts:
+//
+//   - a tag which identifies the invocation syntax (e.g. member
+//   functions must be invoked with a different syntax from regular
+//   functions)
+//
+//   - a pointer to a result converter type, used solely as a way of
+//   transmitting the type of the result converter to the function (or
+//   an int, if the return type is void).
+//
+//   - the "function", which may be a function object, a function or
+//   member function pointer, or a defaulted_virtual_fn.
+//
+//   - The arg_from_python converters for each of the arguments to be
+//   passed to the function being invoked.
+
+namespace boost { namespace python { namespace detail { 
+
+// This "result converter" is really just used as a dispatch tag to
+// invoke(...), selecting the appropriate implementation
+typedef int void_result_to_python;
+
+template <bool void_return, bool member>
+struct invoke_tag_ {};
+
+// A metafunction returning the appropriate tag type for invoking an
+// object of type F with return type R.
+template <class R, class F>
+struct invoke_tag
+  : invoke_tag_<
+        is_same<R,void>::value
+      , is_member_function_pointer<F>::value
+    >
+{
+};
+
+#  define BOOST_PP_ITERATION_PARAMS_1                                            \
+        (3, (0, BOOST_PYTHON_MAX_ARITY, <boost/python/detail/invoke.hpp>))
+#  include BOOST_PP_ITERATE()
+
+}}} // namespace boost::python::detail
+
+# endif // INVOKE_DWA20021122_HPP
+#else 
+
+# define N BOOST_PP_ITERATION()
+
+template <class RC, class F BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class AC)>
+inline PyObject* invoke(invoke_tag_<false,false>, RC const& rc, F& f BOOST_PP_ENUM_TRAILING_BINARY_PARAMS_Z(1, N, AC, & ac) )
+{
+    return rc(f( BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, ac, () BOOST_PP_INTERCEPT) ));
+}
+                 
+template <class RC, class F BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class AC)>
+inline PyObject* invoke(invoke_tag_<true,false>, RC const&, F& f BOOST_PP_ENUM_TRAILING_BINARY_PARAMS_Z(1, N, AC, & ac) )
+{
+    f( BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, ac, () BOOST_PP_INTERCEPT) );
+    return none();
+}
+
+template <class RC, class F, class TC BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class AC)>
+inline PyObject* invoke(invoke_tag_<false,true>, RC const& rc, F& f, TC& tc BOOST_PP_ENUM_TRAILING_BINARY_PARAMS_Z(1, N, AC, & ac) )
+{
+    return rc( (tc().*f)(BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, ac, () BOOST_PP_INTERCEPT)) );
+}
+                 
+template <class RC, class F, class TC BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class AC)>
+inline PyObject* invoke(invoke_tag_<true,true>, RC const&, F& f, TC& tc BOOST_PP_ENUM_TRAILING_BINARY_PARAMS_Z(1, N, AC, & ac) )
+{
+    (tc().*f)(BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, ac, () BOOST_PP_INTERCEPT));
+    return none();
+}
+
+# undef N
+
+#endif // BOOST_PP_IS_ITERATING