//Copyright (c) 2006-2009 Emil Dotchevski and Reverge Studios, Inc. //Distributed under the Boost Software License, Version 1.0. (See accompanying //file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) //This example shows how boost::tuple can be used to bundle the //name of the function that fails together with the reported errno. #include <boost/exception/info_tuple.hpp> #include <boost/exception/errinfo_file_name.hpp> #include <boost/exception/errinfo_api_function.hpp> #include <boost/exception/errinfo_errno.hpp> #include <boost/shared_ptr.hpp> #include <stdio.h> #include <string> #include <errno.h> typedef boost::tuple<boost::errinfo_api_function,boost::errinfo_errno> clib_failure; struct file_open_error: virtual boost::exception { }; boost::shared_ptr<FILE> file_open( char const * name, char const * mode ) { if( FILE * f=fopen(name,mode) ) return boost::shared_ptr<FILE>(f,fclose); else throw file_open_error() << boost::errinfo_file_name(name) << clib_failure("fopen",errno); }