Where we've used enable_if, it has been very common that the condition is not just a single traits lookup, but rather a logical expression, e.g.:
template <class T, class U> typename enable_if<is_matrix<T>::value && is_vector<U>::value,...>::type operator*(const T& t, const U& u); So definitely, this version of enable_if is needed. Jaakko & Jeremiah In our last exciting episode Thomas Witt wrote: > User-Agent: KMail/1.5 > I doubt that the _c version are needed frequently enough to warrant the extra > types. > Thomas > -- > Dipl.-Ing. Thomas Witt > Institut fuer Verkehrswesen, Eisenbahnbau und -betrieb, Universitaet Hannover > voice: +49(0) 511 762 - 4273, fax: +49(0) 511 762-3001 > http://www.ive.uni-hannover.de > _______________________________________________ > Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost
