73 #define NW_FOREACH_TYPEOF(COL) \  argument
74     (true ? 0 : nw::ut::internal::encode_type(COL))
248 #define NW_FOREACH_CONTAIN(COL) \  argument
249     nw::ut::internal::contain(COL)
251 #define NW_FOREACH_BEGIN(COL) \  argument
252     nw::ut::internal::begin(_contain, NW_FOREACH_TYPEOF(COL))
254 #define NW_FOREACH_END(COL) \  argument
255     nw::ut::internal::end(_contain, NW_FOREACH_TYPEOF(COL))
257 #define NW_FOREACH_DONE(COL) \  argument
258     nw::ut::internal::done(_cur, _end, NW_FOREACH_TYPEOF(COL))
260 #define NW_FOREACH_NEXT(COL) \  argument
261     nw::ut::internal::next(_cur, NW_FOREACH_TYPEOF(COL))
263 #define NW_FOREACH_EXTRACT(COL) \  argument
264     nw::ut::internal::extract(_cur, NW_FOREACH_TYPEOF(COL))
267 #define NW_FOREACH(VAR, COL) \  argument
268     if       (nw::ut::internal::static_any_t _contain = NW_FOREACH_CONTAIN(COL)) {} \
269     else if  (nw::ut::internal::static_any_t _cur     = NW_FOREACH_BEGIN(COL))   {} \
270     else if  (nw::ut::internal::static_any_t _end     = NW_FOREACH_END(COL))     {} \
272               _continue && !NW_FOREACH_DONE(COL);                                   \
273               _continue ? NW_FOREACH_NEXT(COL) : (void)0)                           \
275              else for (VAR = NW_FOREACH_EXTRACT(COL); !_continue; _continue = true)