Re: [Config] Swappable/Movable std::streambuf requirement

From: Joaquín M López Muñoz (joaquinlopezmunoz_at_[hidden])
Date: 2020-05-16 20:14:00

Em 16 de mai de 2020, Ã (s) 16:44, Alexander Grund via Boost <boost_at_[hidden]> escreveu:
> 
> Hello,
> 
> 
> C++11 has  `std::basic_streambuf<char>::swap` and move operators for that defined.
> 
> However there are stdlibs which don't support that. clang 5.0 on travis e.g. fails due to that.
> 
> 
> Is there already something in Boost.Config dealing with that case which I can `requires` on to skip the build for that case?
> Most of the checks I've seen in Boost.Config are using the C++ feature test macros but for this there is none.
> 
> 
> If it doesn't exist: Would this be something to be added to Boost.Config? Or my local build files?

You can write a snippet that compiles or breaks and make your test conditional on this. Look for “boost_multi_index_key_supported” in

https://github.com/boostorg/multi_index/blob/develop/test/Jamfile.v2

Joaquín M López Muñoz