Re: [boost] About all these metaprogramming libraries

On Sun, Mar 19, 2017 at 8:09 PM, Peter Dimov via Boost < boost@lists.boost.org> wrote:

Oswin Krause wrote:

For me the biggest question is: will it work natively with mpl::vector?

...

Not very well at the moment; mpl::vector is a list of fixed size 20, whereas mpl::vector::type is of size 3, but still fixed. It will only work with algorithms that don't need to change the size of the list.

It would be possible in principle to make the algorithms take mpl::vector and return mp_list, I suppose.

You forgot to take into account that algorithms such as mpl::insert and mpl::erase return proxies that inherit from vectors and don't expose the elements in their types signatures, while being themselves valid instances of a Vector. This is the real deal breaker.