+} // namespace detail
+
+class make_cerr : public detail::log<detail::channelln> {
+public:
+ make_cerr(const char* filename, int line_number, const char* func) :
+ detail::log<detail::channelln>(std::cerr, filename, line_number, func)
+ { }
+
+private:
+ make_cerr( const make_cerr& );
+ const make_cerr& operator=( const make_cerr& );
+};