1# /* **************************************************************************
2# * *
3# * (C) Copyright Edward Diener 2013.
4# * Distributed under the Boost Software License, Version 1.0. (See
5# * accompanying file LICENSE_1_0.txt or copy at
6# * http://www.boost.org/LICENSE_1_0.txt)
7# * *
8# ************************************************************************** */
9#
10# /* See http://www.boost.org for most recent version. */
11#
12# ifndef BOOST_PREPROCESSOR_TUPLE_REMOVE_HPP
13# define BOOST_PREPROCESSOR_TUPLE_REMOVE_HPP
14#
15# include <boost/preprocessor/config/config.hpp>
16#
17# if BOOST_PP_VARIADICS
18#
19# include <boost/preprocessor/array/remove.hpp>
20# include <boost/preprocessor/array/to_tuple.hpp>
21# include <boost/preprocessor/comparison/greater.hpp>
22# include <boost/preprocessor/control/iif.hpp>
23# include <boost/preprocessor/tuple/size.hpp>
24# include <boost/preprocessor/tuple/to_array.hpp>
25#
26# /* BOOST_PP_TUPLE_REMOVE */
27#
28# define BOOST_PP_TUPLE_REMOVE(tuple, i) \
29 BOOST_PP_IIF \
30 ( \
31 BOOST_PP_GREATER(BOOST_PP_TUPLE_SIZE(tuple),1), \
32 BOOST_PP_TUPLE_REMOVE_EXEC, \
33 BOOST_PP_TUPLE_REMOVE_RETURN \
34 ) \
35 (tuple, i) \
36/**/
37#
38# define BOOST_PP_TUPLE_REMOVE_EXEC(tuple, i) \
39 BOOST_PP_ARRAY_TO_TUPLE(BOOST_PP_ARRAY_REMOVE(BOOST_PP_TUPLE_TO_ARRAY(tuple), i)) \
40/**/
41#
42# define BOOST_PP_TUPLE_REMOVE_RETURN(tuple, i) tuple
43#
44# /* BOOST_PP_TUPLE_REMOVE_D */
45#
46# define BOOST_PP_TUPLE_REMOVE_D(d, tuple, i) \
47 BOOST_PP_IIF \
48 ( \
49 BOOST_PP_GREATER_D(d, BOOST_PP_TUPLE_SIZE(tuple), 1), \
50 BOOST_PP_TUPLE_REMOVE_D_EXEC, \
51 BOOST_PP_TUPLE_REMOVE_D_RETURN \
52 ) \
53 (d, tuple, i) \
54/**/
55#
56# define BOOST_PP_TUPLE_REMOVE_D_EXEC(d, tuple, i) \
57 BOOST_PP_ARRAY_TO_TUPLE(BOOST_PP_ARRAY_REMOVE_D(d, BOOST_PP_TUPLE_TO_ARRAY(tuple), i)) \
58/**/
59#
60# define BOOST_PP_TUPLE_REMOVE_D_RETURN(d, tuple, i) tuple
61#
62# endif // BOOST_PP_VARIADICS
63#
64# endif // BOOST_PREPROCESSOR_TUPLE_REMOVE_HPP
65