Allow macro to be passed only tuple, without the tuple size, when variadics are used.

include/boost/preprocessor/list/for_each_product.hpp

@@ -16,6 +16,7 @@
 #
 # include <boost/preprocessor/config/config.hpp>
 # include <boost/preprocessor/control/if.hpp>
+# include <boost/preprocessor/facilities/overload.hpp>
 # include <boost/preprocessor/list/adt.hpp>
 # include <boost/preprocessor/list/to_tuple.hpp>
 # include <boost/preprocessor/repetition/for.hpp>
@@ -23,23 +24,65 @@
 # include <boost/preprocessor/tuple/to_list.hpp>
 # include <boost/preprocessor/tuple/rem.hpp>
 # include <boost/preprocessor/tuple/reverse.hpp>
+# if BOOST_PP_VARIADICS_MSVC
+# include <boost/preprocessor/cat.hpp>
+# include <boost/preprocessor/facilities/empty.hpp>
+# endif
 #
 # /* BOOST_PP_LIST_FOR_EACH_PRODUCT */
 #
+# define BOOST_PP_LIST_FOR_EACH_PRODUCT_OV_2(macro, size, tuple) BOOST_PP_LIST_FOR_EACH_PRODUCT_E(BOOST_PP_FOR, macro, size, BOOST_PP_TUPLE_TO_LIST(size, tuple))
+#
+# if BOOST_PP_VARIADICS
+#    define BOOST_PP_LIST_FOR_EACH_PRODUCT_OV_1(macro, tuple) BOOST_PP_LIST_FOR_EACH_PRODUCT_E(BOOST_PP_FOR, macro, BOOST_PP_TUPLE_SIZE(tuple), BOOST_PP_TUPLE_TO_LIST(tuple))
+# endif
+#
 # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
-#    define BOOST_PP_LIST_FOR_EACH_PRODUCT(macro, size, tuple) BOOST_PP_LIST_FOR_EACH_PRODUCT_E(BOOST_PP_FOR, macro, size, BOOST_PP_TUPLE_TO_LIST(size, tuple))
+#    if BOOST_PP_VARIADICS
+#        if BOOST_PP_VARIADICS_MSVC
+#            define BOOST_PP_LIST_FOR_EACH_PRODUCT(macro, ...) BOOST_PP_CAT(BOOST_PP_OVERLOAD(BOOST_PP_LIST_FOR_EACH_PRODUCT_OV_,__VA_ARGS__)(macro,__VA_ARGS__),BOOST_PP_EMPTY())
+#        else
+#            define BOOST_PP_LIST_FOR_EACH_PRODUCT(macro, ...) BOOST_PP_OVERLOAD(BOOST_PP_LIST_FOR_EACH_PRODUCT_OV_,__VA_ARGS__)(macro,__VA_ARGS__)
+#        endif
+#    else
+#        define BOOST_PP_LIST_FOR_EACH_PRODUCT(macro, size, tuple) BOOST_PP_LIST_FOR_EACH_PRODUCT_OV_2(macro, size, tuple)
+#    endif
+# else
+#    if BOOST_PP_VARIADICS
+#        define BOOST_PP_LIST_FOR_EACH_PRODUCT(macro, ...) BOOST_PP_LIST_FOR_EACH_PRODUCT_Q(macro, __VA_ARGS__)
+#        define BOOST_PP_LIST_FOR_EACH_PRODUCT_Q(macro, ...) BOOST_PP_OVERLOAD(BOOST_PP_LIST_FOR_EACH_PRODUCT_OV_,__VA_ARGS__)(macro,__VA_ARGS__)
 #    else
 #        define BOOST_PP_LIST_FOR_EACH_PRODUCT(macro, size, tuple) BOOST_PP_LIST_FOR_EACH_PRODUCT_Q(macro, size, tuple)
-#    define BOOST_PP_LIST_FOR_EACH_PRODUCT_Q(macro, size, tuple) BOOST_PP_LIST_FOR_EACH_PRODUCT_E(BOOST_PP_FOR, macro, size, BOOST_PP_TUPLE_TO_LIST(size, tuple))
+#        define BOOST_PP_LIST_FOR_EACH_PRODUCT_Q(macro, size, tuple) BOOST_PP_LIST_FOR_EACH_PRODUCT_OV_2(macro, size, tuple)
+#    endif
 # endif
 #
 # /* BOOST_PP_LIST_FOR_EACH_PRODUCT_R */
 #
+# define BOOST_PP_LIST_FOR_EACH_PRODUCT_R_OV_2(r, macro, size, tuple) BOOST_PP_LIST_FOR_EACH_PRODUCT_E(BOOST_PP_FOR ## r, macro, size, BOOST_PP_TUPLE_TO_LIST(size, tuple))
+#
+# if BOOST_PP_VARIADICS
+#    define BOOST_PP_LIST_FOR_EACH_PRODUCT_R_OV_1(r, macro, tuple) BOOST_PP_LIST_FOR_EACH_PRODUCT_E(BOOST_PP_FOR ## r, macro, BOOST_PP_TUPLE_SIZE(tuple), BOOST_PP_TUPLE_TO_LIST(tuple))
+# endif
+#
 # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
-#    define BOOST_PP_LIST_FOR_EACH_PRODUCT_R(r, macro, size, tuple) BOOST_PP_LIST_FOR_EACH_PRODUCT_E(BOOST_PP_FOR_ ## r, macro, size, BOOST_PP_TUPLE_TO_LIST(size, tuple))
+#    if BOOST_PP_VARIADICS
+#        if BOOST_PP_VARIADICS_MSVC
+#            define BOOST_PP_LIST_FOR_EACH_PRODUCT_R(r, macro, ...) BOOST_PP_CAT(BOOST_PP_OVERLOAD(BOOST_PP_LIST_FOR_EACH_PRODUCT_R_OV_,__VA_ARGS__)(r, macro,__VA_ARGS__),BOOST_PP_EMPTY())
+#        else
+#            define BOOST_PP_LIST_FOR_EACH_PRODUCT_R(r, macro, ...) BOOST_PP_OVERLOAD(BOOST_PP_LIST_FOR_EACH_PRODUCT_R_OV_,__VA_ARGS__)(r, macro,__VA_ARGS__)
+#        endif
+#    else
+#        define BOOST_PP_LIST_FOR_EACH_PRODUCT_R(r, macro, size, tuple) BOOST_PP_LIST_FOR_EACH_PRODUCT_R_OV_2(r, macro, size, tuple)
+#    endif
+# else
+#    if BOOST_PP_VARIADICS
+#        define BOOST_PP_LIST_FOR_EACH_PRODUCT_R(r, macro, ...) BOOST_PP_LIST_FOR_EACH_PRODUCT_R_Q(r, macro, __VA_ARGS__)
+#        define BOOST_PP_LIST_FOR_EACH_PRODUCT_R_Q(r, macro, ...) BOOST_PP_OVERLOAD(BOOST_PP_LIST_FOR_EACH_PRODUCT_R_OV_,__VA_ARGS__)(macro,__VA_ARGS__)
 #    else
 #        define BOOST_PP_LIST_FOR_EACH_PRODUCT_R(r, macro, size, tuple) BOOST_PP_LIST_FOR_EACH_PRODUCT_R_Q(r, macro, size, tuple)
-#    define BOOST_PP_LIST_FOR_EACH_PRODUCT_R_Q(r, macro, size, tuple) BOOST_PP_LIST_FOR_EACH_PRODUCT_E(BOOST_PP_FOR_ ## r, macro, size, BOOST_PP_TUPLE_TO_LIST(size, tuple))
+#        define BOOST_PP_LIST_FOR_EACH_PRODUCT_R_Q(r, macro, size, tuple) BOOST_PP_LIST_FOR_EACH_PRODUCT_R_OV_2(r, macro, size, tuple)
+#    endif
 # endif
 #
 # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()

test/list.cxx

@@ -244,6 +244,12 @@ BEGIN BOOST_PP_LIST_SIZE(BOOST_PP_LIST_FILTER(BOOST_PP_EQUAL_D, 372, LIST_512))
 
 BEGIN BOOST_PP_LIST_FOR_EACH_PRODUCT(F2, 2, ( (1, (0, BOOST_PP_NIL)), (2, (3, BOOST_PP_NIL)) )) == 0 END
 
+# if BOOST_PP_VARIADICS
+
+BEGIN BOOST_PP_LIST_FOR_EACH_PRODUCT(F2, ( (1, (0, BOOST_PP_NIL)), (2, (3, BOOST_PP_NIL)) )) == 0 END
+
+#endif
+
 BEGIN BOOST_PP_LIST_CAT(BOOST_PP_LIST_FOLD_LEFT(BOOST_PP_LIST_APPEND_D, BOOST_PP_NIL, LL)) == 0x0a1b2c3d END
 
 BEGIN BOOST_PP_ARRAY_ELEM(2, BOOST_PP_LIST_TO_ARRAY(LIST)) == 5 END