boost/preprocessor/tuple/pop_back.hpp
# /* ************************************************************************** # * * # * (C) Copyright Edward Diener 2013. # * Distributed under the Boost Software License, Version 1.0. (See # * accompanying file LICENSE_1_0.txt or copy at # * http://www.boost.org/LICENSE_1_0.txt) # * * # ************************************************************************** */ # # /* See http://www.boost.org for most recent version. */ # # ifndef BOOST_PREPROCESSOR_TUPLE_POP_BACK_HPP # define BOOST_PREPROCESSOR_TUPLE_POP_BACK_HPP # # include <boost/preprocessor/config/config.hpp> # include <boost/preprocessor/array/pop_back.hpp> # include <boost/preprocessor/array/to_tuple.hpp> # include <boost/preprocessor/comparison/greater.hpp> # include <boost/preprocessor/control/iif.hpp> # include <boost/preprocessor/tuple/size.hpp> # include <boost/preprocessor/tuple/to_array.hpp> # # /* BOOST_PP_TUPLE_POP_BACK */ # # define BOOST_PP_TUPLE_POP_BACK(tuple) \ BOOST_PP_IIF \ ( \ BOOST_PP_GREATER(BOOST_PP_TUPLE_SIZE(tuple),1), \ BOOST_PP_TUPLE_POP_BACK_EXEC, \ BOOST_PP_TUPLE_POP_BACK_RETURN \ ) \ (tuple) \ /**/ # # define BOOST_PP_TUPLE_POP_BACK_EXEC(tuple) \ BOOST_PP_ARRAY_TO_TUPLE(BOOST_PP_ARRAY_POP_BACK(BOOST_PP_TUPLE_TO_ARRAY(tuple))) \ /**/ # # define BOOST_PP_TUPLE_POP_BACK_RETURN(tuple) tuple # # /* BOOST_PP_TUPLE_POP_BACK_Z */ # # define BOOST_PP_TUPLE_POP_BACK_Z(z, tuple) \ BOOST_PP_IIF \ ( \ BOOST_PP_GREATER(BOOST_PP_TUPLE_SIZE(tuple),1), \ BOOST_PP_TUPLE_POP_BACK_Z_EXEC, \ BOOST_PP_TUPLE_POP_BACK_Z_RETURN \ ) \ (z, tuple) \ /**/ # # define BOOST_PP_TUPLE_POP_BACK_Z_EXEC(z, tuple) \ BOOST_PP_ARRAY_TO_TUPLE(BOOST_PP_ARRAY_POP_BACK_Z(z, BOOST_PP_TUPLE_TO_ARRAY(tuple))) \ /**/ # # define BOOST_PP_TUPLE_POP_BACK_Z_RETURN(z, tuple) tuple # # endif // BOOST_PREPROCESSOR_TUPLE_POP_BACK_HPP