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Implemented support for custom to_string overloads for converting boost::error_info objects to string by the boost::diagnostic_information function.

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[SVN r50507]
This commit is contained in:
Emil Dotchevski
2009-01-08 01:26:15 +00:00
parent b52e6c7d6b
commit f28285c073
4 changed files with 60 additions and 16 deletions
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10
example/example_io.cpp
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@ -19,6 +19,7 @@
#include <errno.h>
#include <string>
#include <iostream>
#include <sstream>
typedef boost::error_info<struct tag_errno,int> errno_info;
typedef boost::error_info<struct tag_file_stream,boost::weak_ptr<FILE> > file_stream_info;
@ -28,6 +29,15 @@ typedef boost::error_info<struct tag_file_name_src,std::string> file_name_src_in
typedef boost::error_info<struct tag_file_name_dst,std::string> file_name_dst_info; //The destination file name of a failed copy operation.
typedef boost::error_info<struct tag_function,std::string> function_info; //The name of the C function which reported the failure.
std::string
to_string( errno_info const & e )
{
int en=e.value();
std::ostringstream s;
s << en << ", OS says \"" << strerror(en) << "\"";
return s.str();
}
char const data[] = "example";
size_t const data_size = sizeof(data);