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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(name,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 | } |