williamkempf@[...].. wrote:
>  I've been thinking a bit about the desire for catch_exceptions() to
>  be able to handle registered exception types

[ Lots of explanation removed. ]

>  Any thoughts or comments on the idea?

This looks interesting. However, I believe we should consider
this only after having initially released the boost test library
and after someone actually writing tests comes up with a need for
it. Usually, I'd expect the ex.what() string to be sufficiently
descriptive. Except for some standard library implementations where
std::bad_alloc::what() is always the empty string. But we do handle
all standard exceptions explicitly already, so that point is moot.

Jens Maurer