71 #define NW_FOREACH_TYPEOF(COL) \  argument
72     (true ? 0 : nw::ut::internal::encode_type(COL))
246 #define NW_FOREACH_CONTAIN(COL) \  argument
247     nw::ut::internal::contain(COL)
249 #define NW_FOREACH_BEGIN(COL) \  argument
250     nw::ut::internal::begin(_contain, NW_FOREACH_TYPEOF(COL))
252 #define NW_FOREACH_END(COL) \  argument
253     nw::ut::internal::end(_contain, NW_FOREACH_TYPEOF(COL))
255 #define NW_FOREACH_DONE(COL) \  argument
256     nw::ut::internal::done(_cur, _end, NW_FOREACH_TYPEOF(COL))
258 #define NW_FOREACH_NEXT(COL) \  argument
259     nw::ut::internal::next(_cur, NW_FOREACH_TYPEOF(COL))
261 #define NW_FOREACH_EXTRACT(COL) \  argument
262     nw::ut::internal::extract(_cur, NW_FOREACH_TYPEOF(COL))
265 #define NW_FOREACH(VAR, COL) \  argument
266     if       (nw::ut::internal::static_any_t _contain = NW_FOREACH_CONTAIN(COL)) {} \
267     else if  (nw::ut::internal::static_any_t _cur     = NW_FOREACH_BEGIN(COL))   {} \
268     else if  (nw::ut::internal::static_any_t _end     = NW_FOREACH_END(COL))     {} \
270               _continue && !NW_FOREACH_DONE(COL);                                   \
271               _continue ? NW_FOREACH_NEXT(COL) : (void)0)                           \
273              else for (VAR = NW_FOREACH_EXTRACT(COL); !_continue; _continue = true)