Re: [boost] Re: Review: Boost Test Library

From: Jens Maurer (Jens.Maurer_at_[hidden])
Date: 2001-02-14 13:25:17

williamkempf_at_[hidden] wrote:
> A)  An exception type may not be derived from a std::exception type.

True.

> B)  The user might want to register special error handling beyond
> simple output of the cause for failure (execution_tools or even
> catch_exceptions() may be used outside of test harnesses).
> C)  The user may want to override previously registered handlers to
> do specific actions instead of or in addition to the previous
> behavior.

In response to B + C, if the user wants to deal specially with some
exceptions, I looks like a regular   try { } catch(my_exception&) 
block around his code is what he wants.  I don't see at the moment
why this should be wrapped in some external library where you have to
register a handler etc.

However, I do recognize that the pattern presented is an ingenious
one to offload exception type detection to somewhere else, thus allowing
code re-use.  Probably some future boost library can explore this a
bit more and make a nice service out of it.  In general, the need for
this seems to point out design problems in the exception design, though.

Jens Maurer