Re: [proposal] OpenMethod library

From: Dominique Devienne (ddevienne_at_[hidden])
Date: 2025-03-11 13:17:37

On Tue, Mar 11, 2025 at 1:50 PM Jean-Louis Leroy via Boost
<boost_at_[hidden]> wrote:
> > Quick question: Given the ability to return different (necessarily related?)
> > types from the same open-method, can we say BOM allows co-variant return type?
> > Like virtual methods / polymorphism allows, just more flexible that plain
> > pointers?
>
> Yes. And in that case, the return type can act as a tie-breaker,
>  as described in N2216.

Thanks again JLL.

I see now this is explicitly treated in the (old) [N2216 paper][1], in fact.

Regarding Boost.TypeErasure, in preparation for the review,
a few words in the doc to compare/contrast them might be warranted.

I look forward to the review. Thanks, --DD

[1]: https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2216.pdf