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From: Terje Slettebø (tslettebo_at_[hidden])
Date: 2003-03-22 12:01:03

>From: "Gennaro Prota" <gennaro_prota_at_[hidden]>

> On Sat, 22 Mar 2003 09:52:07 -0500, David Abrahams
> <dave_at_[hidden]> wrote:
> >Kevlin Henney <kevlin_at_[hidden]> writes:
> >> However, the decision as to whether this should be in the 'what' string
> >> is perhaps one that can be revisited. It would be feasible to avoid any
> >> allocation issues at all by leaving the human readable string as
> >> as it was before and adding type_info members that described the source
> >> and target types.
> >
> >Yes, that was my suggestion.
> I'm happy that std::type_info has a private copy constructor. Hadn't
> it been for that, my suggestion to use just a couple of typedefs would
> have been routinely rejected :-)

Storing a couple of type members is not enough, by itself. How would a
catch-clause taking e.g. a reference to bad_lexical_cast access them? To
access the typedefs, you need to know the exact type thrown, which means you
need to know the types to begin with...

I don't understand how this relates to private copy constructor, though,
could you explain?



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