python/detail/make_tuple.hpp

0001 # ifndef BOOST_PYTHON_SYNOPSIS
0002 # // Copyright David Abrahams 2002.
0003 # // Distributed under the Boost Software License, Version 1.0. (See
0004 # // accompanying file LICENSE_1_0.txt or copy at
0005 # // http://www.boost.org/LICENSE_1_0.txt)
0006
0007 #  if !defined(BOOST_PP_IS_ITERATING)
0008 #   error Boost.Python - do not include this file!
0009 #  endif
0010
0011 #  define N BOOST_PP_ITERATION()
0012
0013 #  define BOOST_PYTHON_MAKE_TUPLE_ARG(z, N, ignored)    \
0014     PyTuple_SET_ITEM(                                   \
0015         result.ptr()                                    \
0016         , N                                             \
0017         , python::incref(python::object(a##N).ptr())    \
0018         );
0019
0020     template <BOOST_PP_ENUM_PARAMS_Z(1, N, class A)>
0021     tuple
0022     make_tuple(BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, A, const& a))
0023     {
0024         tuple result((detail::new_reference)::PyTuple_New(N));
0025         BOOST_PP_REPEAT_1ST(N, BOOST_PYTHON_MAKE_TUPLE_ARG, _)
0026         return result;
0027     }
0028
0029 #  undef BOOST_PYTHON_MAKE_TUPLE_ARG
0030
0031 #  undef N
0032 # endif // BOOST_PYTHON_SYNOPSIS