1 2 // (C) Copyright Edward Diener 2011-2015 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_IS_LIST_HPP) 8 #define BOOST_VMD_IS_LIST_HPP 9 10 #include <boost/vmd/detail/setup.hpp> 11 12 #if BOOST_PP_VARIADICS 13 14 #include <boost/vmd/detail/is_list.hpp> 15 16 /* 17 18 The succeeding comments in this file are in doxygen format. 19 20 */ 21 22 /** \file 23 */ 24 25 /** \def BOOST_VMD_IS_LIST(sequence) 26 27 \brief Determines if a sequence is a Boost pplib list. 28 29 The macro checks that the sequence is a pplib list. 30 It returns 1 if it is a list, else if returns 0. 31 32 sequence = input as a possible Boost PP list. 33 34 returns = 1 if it a list, else returns 0. 35 36 The macro will generate a preprocessing error if the input 37 is in the form of a list but its end-of-list marker, instead 38 of being an identifier, is a preprocessor token which VMD cannot parse, 39 as in the example '(anything,&BOOST_PP_NIL)' which is a valid tuple but 40 an invalid list. 41 42 */ 43 44 #define BOOST_VMD_IS_LIST(sequence) \ 45 BOOST_VMD_DETAIL_IS_LIST(sequence) \ 46 /**/ 47 48 /** \def BOOST_VMD_IS_LIST_D(d,sequence) 49 50 \brief Determines if a sequence is a Boost pplib list. Re-entrant version. 51 52 The macro checks that the sequence is a pplib list. 53 It returns 1 if it is a list, else if returns 0. 54 55 d = The next available BOOST_PP_WHILE iteration. <br/> 56 sequence = input as a possible Boost PP list. 57 58 returns = 1 if it a list, else returns 0. 59 60 The macro will generate a preprocessing error if the input 61 is in the form of a list but its end-of-list marker, instead 62 of being an identifier, is a preprocessor token which VMD cannot parse, 63 as in the example '(anything,&BOOST_PP_NIL)' which is a valid tuple but 64 an invalid list. 65 66 */ 67 68 #define BOOST_VMD_IS_LIST_D(d,sequence) \ 69 BOOST_VMD_DETAIL_IS_LIST_D(d,sequence) \ 70 /**/ 71 72 #endif /* BOOST_PP_VARIADICS */ 73 #endif /* BOOST_VMD_IS_LIST_HPP */ 74