Re: [boost] boost::variant 0.2 (was: Yet another ...)

From: Giovanni Bajo (giovannibajo_at_[hidden])
Date: 2002-07-16 04:33:09

----- Original Message -----
From: Itay Maman
To: boost_at_[hidden]
Sent: Tuesday, July 16, 2002 10:45 AM
Subject: Re: [boost] boost::variant 0.2 (was: Yet another ...)

>An updated version of boost::variant is now available at:
http://groups.yahoo.com/group/boost/files/boost_variant_160702.zip. This
version is compatbile with these compilers: GCC >3.0.4, CodeWarrior 7.0,
MSVC 6 and MSVC 7.
>Please note that test4 is currently broken with MSVC 7, since it
instantiates variants with more than 8 types. The other 3 compilers use the
RDSL (Reduced Dot-Style Typelist) >mechanism, so they don't impose this
restriction. Anyway, I expect this issue to be fixed with MPL's formal
relese code.

>Comments and compatibility reports are welcomed.

All the tests work on Comeau but the first one which still triggers an
internal Comeau 'issue' (it generates a symbol name too long for MSVC to
handle it). Just two questions, from a quick look I gave to the examples.
Please, simply ignore them if they have been already answered, I'll go back
looking for them in the loooong variant threads :)

- Why variant_casts cast between pointers instead of objects (references)?
- Is it possibile to autodetect when incomplete<> is needed? Since it
actually depends on things like header include order and such, it seems to
me a hazard forcing the user to specify incomplete<>.

Giovanni Bajo