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Subject: Re: [boost] About all these metaprogramming libraries
From: Peter Dimov (lists_at_[hidden])
Date: 2017-03-19 20:29:00

Bruno Dutra wrote:
> > 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.

On MSVC, insert/erase return numbered vectors, but on g++ and clang++,
you're right, they return some weird v_item sequences.

What is our use case here though? From where would those mpl types come?

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