Custom Exception types

[philsquared]

Currently, exceptions not derived from std::exception (other than raw strings) are caught by CATCH, but it doesn't know how to get any messages out.
A mechanism is needed to be able to specify custom exception types so more informative messages can be given.

I can't think of any clean (portable) ways to do this OTTOMH, but one way to "hack it" would be to have a macro, CUSTOM_EXCEPTION_TYPE, as well as CUSTOM_EXCEPTION_HANDLER, which would allow the user to specify a type and how to get the string out respectively.

This has a number of drawbacks. Apart from being very ugly it only allows one custom exception type to be specified (unless we have CUSTOM_EXCEPTION_TYPE2 etc), and the caller has to make sure the macros are defined before catch is included.

Any better ideas are very welcome!

[philsquared]

Thanks to James Bates, who suggested that a ... handler can call out to external functions that can rethrow within another try-catch and catch the exception by type there.

[philsquared]

Implemented. See CATCH_TRANSLATE_EXCEPTION