projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
1 | |
| 2 | // (C) Copyright Edward Diener 2015 | |
| 3 | // Use, modification and distribution are subject to the Boost Software License, | |
| 4 | // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at | |
| 5 | // http://www.boost.org/LICENSE_1_0.txt). | |
| 6 | ||
| 7 | #if !defined(BOOST_VMD_TUPLE_REMOVE_HPP) | |
| 8 | #define BOOST_VMD_TUPLE_REMOVE_HPP | |
| 9 | ||
| 10 | #include <boost/vmd/detail/setup.hpp> | |
| 11 | ||
| 12 | #if BOOST_PP_VARIADICS | |
| 13 | ||
| 14 | #include <boost/preprocessor/comparison/equal.hpp> | |
| 15 | #include <boost/preprocessor/control/iif.hpp> | |
| 16 | #include <boost/preprocessor/logical/bitand.hpp> | |
| 17 | #include <boost/preprocessor/tuple/remove.hpp> | |
| 18 | #include <boost/preprocessor/tuple/size.hpp> | |
| 19 | #include <boost/vmd/empty.hpp> | |
| 20 | ||
| 21 | /* | |
| 22 | ||
| 23 | The succeeding comments in this file are in doxygen format. | |
| 24 | ||
| 25 | */ | |
| 26 | ||
| 27 | /** \file | |
| 28 | */ | |
| 29 | ||
| 30 | /** \def BOOST_VMD_TUPLE_REMOVE(tuple,index) | |
| 31 | ||
| 32 | \brief removes an element from a tuple. | |
| 33 | ||
| f67539c2 | 34 | tuple = tuple from which an element is to be removed. <br/> |
| 7c673cae FG |
35 | index = The zero-based position in tuple of the element to be removed. |
| 36 | ||
| 37 | If index is greater or equal to the tuple size the result is undefined. | |
| 38 | If the tuple is a single element and the index is 0 the result is an empty tuple. | |
| 39 | Otherwise the result is a tuple after removing the index element. | |
| 40 | */ | |
| 41 | ||
| 42 | #define BOOST_VMD_TUPLE_REMOVE(tuple,index) \ | |
| 43 | BOOST_PP_IIF \ | |
| 44 | ( \ | |
| 45 | BOOST_PP_BITAND \ | |
| 46 | ( \ | |
| 47 | BOOST_PP_EQUAL(index,0), \ | |
| 48 | BOOST_PP_EQUAL(BOOST_PP_TUPLE_SIZE(tuple),1) \ | |
| 49 | ), \ | |
| 50 | BOOST_VMD_EMPTY, \ | |
| 51 | BOOST_PP_TUPLE_REMOVE \ | |
| 52 | ) \ | |
| 53 | (tuple,index) \ | |
| 54 | /**/ | |
| 55 | ||
| 56 | /** \def BOOST_VMD_TUPLE_REMOVE_D(d,tuple,index) | |
| 57 | ||
| 58 | \brief removes an element from a tuple. It reenters BOOST_PP_WHILE with maximum efficiency. | |
| 59 | ||
| f67539c2 TL |
60 | d = The next available BOOST_PP_WHILE iteration. <br/> |
| 61 | tuple = tuple from which an element is to be removed. <br/> | |
| 7c673cae FG |
62 | index = The zero-based position in tuple of the element to be removed. |
| 63 | ||
| 64 | If index is greater or equal to the tuple size the result is undefined. | |
| 65 | If the tuple is a single element and the index is 0 the result is an empty tuple. | |
| 66 | Otherwise the result is a tuple after removing the index element. | |
| 67 | */ | |
| 68 | ||
| 69 | #define BOOST_VMD_TUPLE_REMOVE_D(d,tuple,index) \ | |
| 70 | BOOST_PP_IIF \ | |
| 71 | ( \ | |
| 72 | BOOST_PP_BITAND \ | |
| 73 | ( \ | |
| 74 | BOOST_PP_EQUAL_D(d,index,0), \ | |
| 75 | BOOST_PP_EQUAL_D(d,BOOST_PP_TUPLE_SIZE(tuple),1) \ | |
| 76 | ), \ | |
| 77 | BOOST_VMD_EMPTY, \ | |
| 78 | BOOST_PP_TUPLE_REMOVE_D \ | |
| 79 | ) \ | |
| 80 | (d,tuple,index) \ | |
| 81 | /**/ | |
| 82 | ||
| 83 | #endif /* BOOST_PP_VARIADICS */ | |
| 84 | #endif /* BOOST_VMD_TUPLE_REMOVE_HPP */ |