[Boost-users] Extracting "friendly" information from boost::exception

Subject: [Boost-users] Extracting "friendly" information from boost::exception
From: Andreas M. Iwanowski (namezero_at_[hidden])
Date: 2012-07-21 17:50:28

Dear boost experts.

We are using boost::exception in a project of ours, and are trying to extract some information from an exception
to display to the user.

For example, diagnostic_information(e) returns this:

d:\projects\<project>\ClassName.cpp(376): Throw in function void __thiscall ClassName::CInetExceptionHandler<struct ClassName::BadLoginException>(class CInternetException *) const
Dynamic exception type: class boost::exception_detail::clone_impl<struct ClassName::BadLoginException>
std::exception::what: Unknown exception
[struct tag_implementation_ClassName_SpecificInfo_errstr *] = Error: 12014 Context: 0 Message: The password was not allowed

[struct tag_interface_CDataInterface_errstr *] = ClassName reports: Bad FTP login

What I want is to extract "Error: 12014 Context: 0 Message: The password was not allowed" or "ClassName reports: Bad FTP login"
from that exception.

However, these exceptions may be generated in DLLs that the main program know nothing about.

To simplify, here is what I do and want ot be happening:

1. Main program calls method in DLL
2. Main program knows this method can throw expections of type boost::exception
3. Main program catches such exception
4. Main program obtains string that is user-friendly from this exception

Has anyone acccomplished this or knows how to extract the information from above (ideally not by parsing the string?)
Alternatively, could I somehow fill the std::exception::what and then get that information out of boost::exception somehow?

Thanks everyone!

Mit freundlichen Gr??en / With best regards

Andreas Iwanowski - IT Administrator
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