#define prefix_ inline
///////////////////////////////cti.p///////////////////////////////////////
-template <class Arg>
-prefix_ senf::Exception & senf::Exception::operator<<(Arg const & arg)
+template <class Exc, class Arg>
+prefix_ typename boost::enable_if< boost::is_convertible<Exc*,senf::Exception*>, Exc & >::type
+senf::operator<<(Exc const & exc, Arg const & arg)
{
- message_ += boost::lexical_cast<std::string>(arg);
- return *this;
+ const_cast<Exc &>(exc).append( boost::lexical_cast<std::string>(arg) );
+ return const_cast<Exc &>(exc);
}
/////////////////////////////cti.e///////////////////////////////////////