David Abrahams wrote:
void tag_exception(boost::exception& x) { // do something to x }
void read_file() { boost::adorn_exception e( boost::bind( tag_exception, _1 ) ); ... }
This could work, if you find a way to write ~adorn_exception. You'd have void tag_exception( boost::exception & x, std::string const & fn ) { x << error_info<tag_errno>( errno ); x << error_info<tag_filename>( fn ); } void read_file( std::string const & fn ) { boost::adorn_exception e( boost::bind( tag_exception, _1, boost::ref( fn ) ) ); // do something that can throw e.dismiss(); } instead of the straightforward void read_file( std::string const & fn ) { try { // do something that can throw } catch( boost::exception & x ) { x << error_info<tag_errno>( errno ); x << error_info<tag_filename>( fn ); throw; } } I prefer the second.