Hi,
I'm trying to use Boost.Exception library and I have some issues here.
1. How to build exception hierarchy correctly?
According to examples I wrote:
#include <iostream>
#include
struct Error1 : virtual public std::exception, virtual public
boost::exception
{
Error1(const char* msg) : std::exception(msg) {}
};
struct Error2 : virtual public Error1
{
Error2(const char* msg) : Error1(msg) {}
};
...
std::cout << Error2("zzz").what() << std::endl;
I've got
"Unknown exception" instead of "zzz"
2. Strange behavior of boost::enable_error_info
Look at this example:
#include <iostream>
#include
typedef boost::error_info Tag1;
typedef boost::error_info Tag2;
void f1();
void f2();
int main()
{
try
{
f1();
}
catch (const std::exception& e)
{
std::cout << boost::diagnostic_information(e) << std::endl;
}
return 0;
}
void f1()
{
try
{
f2();
}
catch (const std::exception& e)
{
throw boost::enable_error_info(e) << Tag1(1);
}
}
void f2()
{
throw boost::enable_error_info(std::runtime_error("f2 exception"))
<< Tag2(2)
;
}
It prints:
Throw location unknown (consider using BOOST_THROW_EXCEPTION)
Dynamic exception type:
boost::exception_detail::error_info_injectorstd::exception
std::exception::what: std::exception
[Tag1_*] = 1
Where is Tag2 data?
Looks like enable_error_info erases all previous accumulated infos.
Besides, type of exception is reported as "std::exception", not
"std::runtime_error"
