[boost] [variant] regressions in GCC 2.95 --seemingly an MPL-related problem

From: Joaquín Mª López Muñoz (joaquin_at_[hidden])
Date: 2004-10-25 07:33:52

I think I've reduced the problem Boost.Variant is
having with GCC 2.95 (see for instance http://tinyurl.com/4sd7u
and http://tinyurl.com/4dqqd)

The attached snippet works OK for GCC 3.2 and other compilers,
but ICEs on GCC 2.95, with the same problem shown in
Boost.Variant.

The culprit has to do with transform (and other MPL algoritmhs)
dealing with expressions of the form:

apply1<lambda<sizeof_<_1> >::type,_1>

wich AFAIK are correct (otherwise somebody please correct me.)

In case it is not possible to fix this in the MPL, I think I
can hack a specific workaround for GCC 2.95 into the code
of Boost.Variant, but I guess trying to fix MPL first is
more sensible.

HTH

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo