Joel wrote:
Brian Braatz wrote:
Could it be as simple as missing the namespace on the is_sqeuence<> call?
Have you tried it? If it was, I wouldn't have bothered the list ;-) Try replacing int_<0> with int.
I think the problem is the way mpl::is_sequence is implemented. It tries to detect the presence of a "tag" typedef and a "begin" typedef and concludes that a type is an mpl::sequence if it has both. I've complained a long time ago about this. I think this behavior is error prone. It's quite easy to come up with a situation where I have a type T with a "tag" and a "begin" but is not an MPL sequence. There must be a better way. MPL should not monopolize on the usage of "tag" and a "begin" in a type. Anyway, in any case, is_sequence<int_<0> >::value should never fail to compile. Regards, -- Joel de Guzman http://www.boost-consulting.com http://spirit.sf.net