Re: [Boost-users] [mpl]pop_front function on integral sequence

Vít Kasal wrote:

Hi,

I have a problem with using pop_front on an integral sequence.

pop_front< vector_c<T, c1, c2, ... cn> >::type

results in

vector<c2, ... cn>

Really? It removes two elements - or is that just a typo?

Is it intended behavior?

Returning a 'vector' instead of a 'vector_c'? Yes, since 'vector_c' is just a "convenience wrapper" to create 'vector's. Removing two elements instead of one? No. That would be a bug.

Is there some way to get

vector_c<T, c2, ... cn> >

No. Why do you need it? You get a Random Access Sequence full of Integral Constants. Treat it as such and you don't need to rely on the identity of the template-id. Regards, Tobias