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