vmd/seq/to_list.hpp

0001
0002 //  (C) Copyright Edward Diener 2015
0003 //  Use, modification and distribution are subject to the Boost Software License,
0004 //  Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
0005 //  http://www.boost.org/LICENSE_1_0.txt).
0006
0007 #if !defined(BOOST_VMD_SEQ_TO_LIST_HPP)
0008 #define BOOST_VMD_SEQ_TO_LIST_HPP
0009
0010 #include <boost/vmd/detail/setup.hpp>
0011
0012 #if BOOST_PP_VARIADICS
0013
0014 #include <boost/preprocessor/control/iif.hpp>
0015 #include <boost/preprocessor/seq/to_list.hpp>
0016 // #include <boost/vmd/identity.hpp>
0017 #include <boost/vmd/is_empty.hpp>
0018
0019 /*
0020
0021   The succeeding comments in this file are in doxygen format.
0022
0023 */
0024
0025 /** \file
0026 */
0027
0028 /** \def BOOST_VMD_SEQ_TO_LIST(seq)
0029
0030     \brief converts a seq to a list.
0031
0032     seq = seq to be converted.
0033
0034     If the seq is an empty seq it is converted to an empty list (BOOST_PP_NIL).
0035     Otherwise the seq is converted to a list with the same number of elements as the seq.
0036 */
0037
0038 #if BOOST_VMD_MSVC
0039 #define BOOST_VMD_SEQ_TO_LIST(seq) \
0040         BOOST_PP_IIF \
0041             ( \
0042             BOOST_VMD_IS_EMPTY(seq), \
0043             BOOST_VMD_SEQ_TO_LIST_PE, \
0044             BOOST_VMD_SEQ_TO_LIST_NPE \
0045             ) \
0046         (seq) \
0047 /**/
0048 #define BOOST_VMD_SEQ_TO_LIST_PE(seq) BOOST_PP_NIL
0049 /**/
0050 #define BOOST_VMD_SEQ_TO_LIST_NPE(seq) BOOST_PP_SEQ_TO_LIST(seq)
0051 /**/
0052 #else
0053 #define BOOST_VMD_SEQ_TO_LIST(seq) \
0054     BOOST_PP_IIF \
0055         ( \
0056         BOOST_VMD_IS_EMPTY(seq), \
0057         BOOST_VMD_IDENTITY(BOOST_PP_NIL), \
0058         BOOST_PP_SEQ_TO_LIST \
0059         ) \
0060     (seq) \
0061 /**/
0062 #endif
0063
0064 #endif /* BOOST_PP_VARIADICS */
0065 #endif /* BOOST_VMD_SEQ_TO_LIST_HPP */