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_POP_FRONT_HPP 13 # define BOOST_PREPROCESSOR_TUPLE_POP_FRONT_HPP 14 # 15 # include <boost/preprocessor/config/config.hpp> 16 # 17 # if BOOST_PP_VARIADICS 18 # 19 # include <boost/preprocessor/array/pop_front.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 # 27 # /* BOOST_PP_TUPLE_POP_FRONT */ 28 # 29 # define BOOST_PP_TUPLE_POP_FRONT(tuple) \ 30 BOOST_PP_IIF \ 31 ( \ 32 BOOST_PP_GREATER(BOOST_PP_TUPLE_SIZE(tuple),1), \ 33 BOOST_PP_TUPLE_POP_FRONT_EXEC, \ 34 BOOST_PP_TUPLE_POP_FRONT_RETURN \ 35 ) \ 36 (tuple) \ 37 /**/ 38 # 39 # define BOOST_PP_TUPLE_POP_FRONT_EXEC(tuple) \ 40 BOOST_PP_ARRAY_TO_TUPLE(BOOST_PP_ARRAY_POP_FRONT(BOOST_PP_TUPLE_TO_ARRAY(tuple))) \ 41 /**/ 42 # 43 # define BOOST_PP_TUPLE_POP_FRONT_RETURN(tuple) tuple 44 # 45 # /* BOOST_PP_TUPLE_POP_FRONT_Z */ 46 # 47 # define BOOST_PP_TUPLE_POP_FRONT_Z(z, tuple) \ 48 BOOST_PP_IIF \ 49 ( \ 50 BOOST_PP_GREATER(BOOST_PP_TUPLE_SIZE(tuple),1), \ 51 BOOST_PP_TUPLE_POP_FRONT_Z_EXEC, \ 52 BOOST_PP_TUPLE_POP_FRONT_Z_RETURN \ 53 ) \ 54 (z, tuple) \ 55 /**/ 56 # 57 # define BOOST_PP_TUPLE_POP_FRONT_Z_EXEC(z, tuple) \ 58 BOOST_PP_ARRAY_TO_TUPLE(BOOST_PP_ARRAY_POP_FRONT_Z(z, BOOST_PP_TUPLE_TO_ARRAY(tuple))) \ 59 /**/ 60 # 61 # define BOOST_PP_TUPLE_POP_FRONT_Z_RETURN(z, tuple) tuple 62 # 63 # endif // BOOST_PP_VARIADICS 64 # 65 # endif // BOOST_PREPROCESSOR_TUPLE_POP_FRONT_HPP 66