| //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); |
| } |