| 1 | //Copyright (c) 2006-2009 Emil Dotchevski and Reverge Studios, Inc. |
|---|---|
| 2 | |
| 3 | //Distributed under the Boost Software License, Version 1.0. (See accompanying |
| 4 | //file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| 5 | |
| 6 | //This example shows how boost::tuple can be used to bundle the |
| 7 | //name of the function that fails together with the reported errno. |
| 8 | |
| 9 | #include <boost/exception/info_tuple.hpp> |
| 10 | #include <boost/exception/errinfo_file_name.hpp> |
| 11 | #include <boost/exception/errinfo_api_function.hpp> |
| 12 | #include <boost/exception/errinfo_errno.hpp> |
| 13 | #include <boost/shared_ptr.hpp> |
| 14 | #include <stdio.h> |
| 15 | #include <string> |
| 16 | #include <errno.h> |
| 17 | |
| 18 | typedef boost::tuple<boost::errinfo_api_function,boost::errinfo_errno> clib_failure; |
| 19 | |
| 20 | struct file_open_error: virtual boost::exception { }; |
| 21 | |
| 22 | boost::shared_ptr<FILE> |
| 23 | file_open( char const * name, char const * mode ) |
| 24 | { |
| 25 | if( FILE * f=fopen(filename: name,modes: mode) ) |
| 26 | return boost::shared_ptr<FILE>(f,fclose); |
| 27 | else |
| 28 | throw file_open_error() << |
| 29 | boost::errinfo_file_name(name) << |
| 30 | clib_failure("fopen",errno); |
| 31 | } |
| 32 |