----- Mensaje original ----- De: Peter Dimov <pdimov@mmltd.net> Fecha: Domingo, Marzo 13, 2005 2:18 pm Asunto: Re: [boost] [aligned_storage][repost] problems with GCC 4.0.0 20050309

JOAQUIN LOPEZ MU?Z wrote:

...

The class aligned_storage in boost/aligned_storage.hpp has the following decl:

template < std::size_t size_ , std::size_t alignment_ = std::size_t(-1)

...

class aligned_storage;

GCC 4.0 complains about the default value for aligmnent_ saying that:

'(size_t)((-1))' is not a valid template argument for type 'unsigned int' because it is a non-constant expression

which is ruining some of the regression tests. Is GCC right or shall I submit a bug report at gcc.gnu.org/bugzilla?

I don't see anything in the standard or in the issue lists that prohibits size_t(-1) as an integral constant expression. Bug report.

Alas, I tried to isolate this into a simple snippet #include <cstddef> template < std::size_t size_ , std::size_t alignment_ = std::size_t(-1)> class aligned_storage { }; int main() { aligned_storage<1> as; } but then the problem goes away. Would some kind soul with access to GCC 4.0.0 care to take a look at this? The actual problem is shown at: http://tinyurl.com/4hxy5 Thank you very much, Joaquín M López Muñoz Telefónica, Investigación y Desarrollo