feedc0de/boost_preprocessor
1
0
Fork 0
forked from boostorg/preprocessor
Code Pull Requests Activity

single element fix

Browse Source 
[SVN r30808]
This commit is contained in:
Paul Mensonides
2005-09-05 07:58:27 +00:00
parent 7c8bd6dec3
commit c9c95e1684
1 changed files with 20 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
include/boost/preprocessor/seq/cat.hpp
View File

@ -12,29 +12,37 @@
# ifndef BOOST_PREPROCESSOR_SEQ_CAT_HPP
# define BOOST_PREPROCESSOR_SEQ_CAT_HPP
#
# include <boost/preprocessor/arithmetic/dec.hpp>
# include <boost/preprocessor/config/config.hpp>
# include <boost/preprocessor/control/if.hpp>
# include <boost/preprocessor/seq/fold_left.hpp>
# include <boost/preprocessor/seq/seq.hpp>
# include <boost/preprocessor/seq/size.hpp>
# include <boost/preprocessor/tuple/eat.hpp>
#
# /* BOOST_PP_SEQ_CAT */
#
# if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
# define BOOST_PP_SEQ_CAT(seq) BOOST_PP_SEQ_FOLD_LEFT(BOOST_PP_SEQ_CAT_O, BOOST_PP_SEQ_HEAD(seq), BOOST_PP_SEQ_TAIL(seq))
# else
# define BOOST_PP_SEQ_CAT(seq) BOOST_PP_SEQ_CAT_I(seq)
# define BOOST_PP_SEQ_CAT_I(seq) BOOST_PP_SEQ_FOLD_LEFT(BOOST_PP_SEQ_CAT_O, BOOST_PP_SEQ_HEAD(seq), BOOST_PP_SEQ_TAIL(seq))
# endif
# define BOOST_PP_SEQ_CAT(seq) \
BOOST_PP_IF( \
BOOST_PP_DEC(BOOST_PP_SEQ_SIZE(seq)), \
BOOST_PP_SEQ_CAT_I, \
BOOST_PP_SEQ_HEAD(seq) BOOST_PP_TUPLE_EAT_1 \
)(seq) \
/**/
# define BOOST_PP_SEQ_CAT_I(seq) BOOST_PP_SEQ_FOLD_LEFT(BOOST_PP_SEQ_CAT_O, BOOST_PP_SEQ_HEAD(seq), BOOST_PP_SEQ_TAIL(seq))
#
# define BOOST_PP_SEQ_CAT_O(s, st, elem) BOOST_PP_SEQ_CAT_O_I(st, elem)
# define BOOST_PP_SEQ_CAT_O_I(a, b) a ## b
#
# /* BOOST_PP_SEQ_CAT_S */
#
# if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
# define BOOST_PP_SEQ_CAT_S(s, seq) BOOST_PP_SEQ_FOLD_LEFT_ ## s(BOOST_PP_SEQ_CAT_O, BOOST_PP_SEQ_HEAD(seq), BOOST_PP_SEQ_TAIL(seq))
# else
# define BOOST_PP_SEQ_CAT_S(s, seq) BOOST_PP_SEQ_CAT_S_I(s, seq)
# define BOOST_PP_SEQ_CAT_S_I(s, seq) BOOST_PP_SEQ_FOLD_LEFT_ ## s(BOOST_PP_SEQ_CAT_O, BOOST_PP_SEQ_HEAD(seq), BOOST_PP_SEQ_TAIL(seq))
# endif
# define BOOST_PP_SEQ_CAT_S(s, seq) \
BOOST_PP_IF( \
BOOST_PP_DEC(BOOST_PP_SEQ_SIZE(seq)), \
BOOST_PP_SEQ_CAT_S_I, \
BOOST_PP_SEQ_HEAD(seq) BOOST_PP_TUPLE_EAT_2 \
)(s, seq) \
/**/
# define BOOST_PP_SEQ_CAT_S_I(s, seq) BOOST_PP_SEQ_FOLD_LEFT_ ## s(BOOST_PP_SEQ_CAT_O, BOOST_PP_SEQ_HEAD(seq), BOOST_PP_SEQ_TAIL(seq))
#
# endif