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single element fix

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[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
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32
include/boost/preprocessor/seq/cat.hpp
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@ -12,29 +12,37 @@
# ifndef BOOST_PREPROCESSOR_SEQ_CAT_HPP # ifndef BOOST_PREPROCESSOR_SEQ_CAT_HPP
# define 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/config/config.hpp>
# include <boost/preprocessor/control/if.hpp>
# include <boost/preprocessor/seq/fold_left.hpp> # include <boost/preprocessor/seq/fold_left.hpp>
# include <boost/preprocessor/seq/seq.hpp> # include <boost/preprocessor/seq/seq.hpp>
# include <boost/preprocessor/seq/size.hpp>
# include <boost/preprocessor/tuple/eat.hpp>
# #
# /* BOOST_PP_SEQ_CAT */ # /* BOOST_PP_SEQ_CAT */
# #
# if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG() # define BOOST_PP_SEQ_CAT(seq) \
# 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)) BOOST_PP_IF( \
# else BOOST_PP_DEC(BOOST_PP_SEQ_SIZE(seq)), \
# define BOOST_PP_SEQ_CAT(seq) BOOST_PP_SEQ_CAT_I(seq) BOOST_PP_SEQ_CAT_I, \
# 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)) BOOST_PP_SEQ_HEAD(seq) BOOST_PP_TUPLE_EAT_1 \
# endif )(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(s, st, elem) BOOST_PP_SEQ_CAT_O_I(st, elem)
# define BOOST_PP_SEQ_CAT_O_I(a, b) a ## b # define BOOST_PP_SEQ_CAT_O_I(a, b) a ## b
# #
# /* BOOST_PP_SEQ_CAT_S */ # /* BOOST_PP_SEQ_CAT_S */
# #
# if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG() # define BOOST_PP_SEQ_CAT_S(s, seq) \
# 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)) BOOST_PP_IF( \
# else BOOST_PP_DEC(BOOST_PP_SEQ_SIZE(seq)), \
# define BOOST_PP_SEQ_CAT_S(s, seq) BOOST_PP_SEQ_CAT_S_I(s, seq) BOOST_PP_SEQ_CAT_S_I, \
# 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)) BOOST_PP_SEQ_HEAD(seq) BOOST_PP_TUPLE_EAT_2 \
# endif )(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 # endif