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).
7 #if !defined(BOOST_VMD_SEQ_POP_BACK_HPP)
8 #define BOOST_VMD_SEQ_POP_BACK_HPP
10 #include <boost/vmd/detail/setup.hpp>
12 #if BOOST_PP_VARIADICS
14 #include <boost/preprocessor/comparison/equal.hpp>
15 #include <boost/preprocessor/control/iif.hpp>
16 #include <boost/preprocessor/seq/pop_back.hpp>
17 #include <boost/preprocessor/seq/size.hpp>
18 #include <boost/vmd/empty.hpp>
22 The succeeding comments in this file are in doxygen format.
29 /** \def BOOST_VMD_SEQ_POP_BACK(seq)
31 \brief pops an element from the end of a seq.
33 seq = seq to pop an element from.
35 If the seq is an empty seq the result is undefined.
36 If the seq is a single element the result is an empty seq.
37 Otherwise the result is a seq after removing the last element.
40 #define BOOST_VMD_SEQ_POP_BACK(seq) \
43 BOOST_PP_EQUAL(BOOST_PP_SEQ_SIZE(seq),1), \
45 BOOST_PP_SEQ_POP_BACK \
50 #endif /* BOOST_PP_VARIADICS */
51 #endif /* BOOST_VMD_SEQ_POP_BACK_HPP */