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Changed functionality so empty arrays/lists when converted to a seq or a tuple expand to nothing.

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Edward Diener
2014-05-05 20:49:20 -04:00
parent df165d9fc6
commit f61bb8a80f
6 changed files with 68 additions and 21 deletions
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19
include/boost/preprocessor/array/to_seq.hpp
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@ -15,19 +15,32 @@
#
# include <boost/preprocessor/cat.hpp>
# include <boost/preprocessor/config/config.hpp>
# include <boost/preprocessor/array/size.hpp>
# include <boost/preprocessor/control/if.hpp>
# include <boost/preprocessor/facilities/empty.hpp>
# include <boost/preprocessor/tuple/to_seq.hpp>
#
# /* BOOST_PP_ARRAY_TO_SEQ */
#
# define BOOST_PP_ARRAY_TO_SEQ(array) \
BOOST_PP_IF \
( \
BOOST_PP_ARRAY_SIZE(array), \
BOOST_PP_ARRAY_TO_SEQ_DO, \
BOOST_PP_EMPTY \
) \
(array) \
/**/
#
# if BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_MSVC()
# define BOOST_PP_ARRAY_TO_SEQ(array) BOOST_PP_ARRAY_TO_SEQ_I(BOOST_PP_TUPLE_TO_SEQ, array)
# define BOOST_PP_ARRAY_TO_SEQ_DO(array) BOOST_PP_ARRAY_TO_SEQ_I(BOOST_PP_TUPLE_TO_SEQ, array)
# define BOOST_PP_ARRAY_TO_SEQ_I(m, args) BOOST_PP_ARRAY_TO_SEQ_II(m, args)
# define BOOST_PP_ARRAY_TO_SEQ_II(m, args) BOOST_PP_CAT(m ## args,)
# elif BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_MWCC()
# define BOOST_PP_ARRAY_TO_SEQ(array) BOOST_PP_ARRAY_TO_SEQ_I(array)
# define BOOST_PP_ARRAY_TO_SEQ_DO(array) BOOST_PP_ARRAY_TO_SEQ_I(array)
# define BOOST_PP_ARRAY_TO_SEQ_I(array) BOOST_PP_TUPLE_TO_SEQ ## array
# else
# define BOOST_PP_ARRAY_TO_SEQ(array) BOOST_PP_TUPLE_TO_SEQ array
# define BOOST_PP_ARRAY_TO_SEQ_DO(array) BOOST_PP_TUPLE_TO_SEQ array
# endif
#
# endif