Re: [PATCH experiment 00/16] C++20 coroutine backend

[Paolo Bonzini]

On 3/15/22 15:24, Peter Maydell wrote:
> On Tue, 15 Mar 2022 at 14:09, Stefan Hajnoczi <stefanha@redhat.com> wrote:
> > Also, once C++ is available people will
> > start submitting C++ patches simply because they are more comfortable
> > with C++ (especially one-time/infrequent contributors).
>
> This to my mind is the major argument against using C++
> for coroutines...

I agree on the need for a policy, but _what_ C++ are they going to be 
contributing that we should be scared of?  We're talking about:

* major features contributed by one-time/infrequent participants (which 
is already a once-in-a-year thing or so, at least for me)

* ... in an area where there are no examples of using C++ in the tree 
(or presumably the maintainer would be comfortable reviewing it)

* ... but yet C++ offer killer features (right now there's only C++ 
coroutines and fpu/)

* ... and where the one-time contributor has put enough investment in 
using these killer C++ features, that telling them to remove the 
features would amount to a rewrite.

That does not seem to be a common situation, and not even a problematic 
one if it were to happen.

Paolo