Re: Boost 1.73, beast and -fconcepts

From: David P. Riedel (driedel_at_[hidden])
Date: 2020-05-04 02:07:02

I'm all set.

Thanks !!!

On 5/2/20 10:44 AM, Richard Hodges via Boost-users wrote:
> Hi David,
> 
> There was a last-minute change to Asio just before the release of boost 
> 1.73 and we didn't catch the fact that this, while fixing Asio for gcc-9 
> -fconcepts, `gcc-10 -std=c++20` and `clang-10 -std=c++20`, it cause 
> Beast to break.
> 
> I have committed a fix to boostorg/beast develop branch.
> 
> Please get in touch if you need help patching your boost-1.73 sources. 
> Either by email or on cpplang slack in the #beast channel.
> 
> https://cppalliance.org/#links
> 
> 
> 
> 
> On Sat, 2 May 2020 at 15:31, David P. Riedel via Boost-users 
> <boost-users_at_[hidden] <mailto:boost-users_at_[hidden]>> wrote:
> 
>     Hi
> 
>     It seems that beast still does not work with gcc 9.3 and -fconcepts.
> 
>     If I try to build the beast test programs using -fconcepts, I still get
>     a lot of errors such as those below.
> 
>     I thought this was fixed in 1.73.
> 
>     ????
> 
>     Thanks
> 
>     ---------------------
> 
>     In file included from ../../../boost/beast/core/basic_stream.hpp:1457,
>      Â  Â  Â  Â  Â  Â  Â  Â  Â  from ../../../boost/beast/core.hpp:16,
>      Â  Â  Â  Â  Â  Â  Â  Â  Â  from doc/core_snippets.cpp:19:
>     ../../../boost/beast/core/impl/basic_stream.hpp:781:1: error: no
>     declaration matches ‘auto boost::beast::basic_stream<
>     <template-parameter-1-1>, <template-parameter-1-2>,
>     <template-parameter-1-3> >::async_connect(const endpoint_type&,
>     ConnectHandler&&)’
>      Â  Â 781 | basic_stream<Protocol, Executor, RatePolicy>::
>      Â  Â  Â  Â | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>     In file included from ../../../boost/beast/core.hpp:16,
>      Â  Â  Â  Â  Â  Â  Â  Â  Â  from doc/core_snippets.cpp:19:
>     ../../../boost/beast/core/basic_stream.hpp:1202:5: note: candidates
>     are:
>     ‘template<class Protocol, class Executor, class RatePolicy>
>     template<class Iterator, class ConnectCondition, class
>     IteratorConnectHandler>Â  requires
>     completion_token_for<IteratorConnectHandler, void()> typename
>     boost::asio::async_result<typename
>     std::decay<RangeConnectHandler>::type, void(boost::system::error_code,
>     Iterator)>::return_type boost::beast::basic_stream<
>     <template-parameter-1-1>, <template-parameter-1-2>,
>     <template-parameter-1-3> >::async_connect(Iterator, Iterator,
>     ConnectCondition, IteratorConnectHandler&&)’
>      Â  1202 |Â  Â  Â async_connect(
>      Â  Â  Â  Â |Â  Â  Â ^~~~~~~~~~~~~
>     ../../../boost/beast/core/basic_stream.hpp:1141:5: note:
>     ‘template<class Protocol, class Executor, class RatePolicy>
>     template<class Iterator, class IteratorConnectHandler>Â  requires
>     completion_token_for<IteratorConnectHandler, void()> typename
>     boost::asio::async_result<typename
>     std::decay<RangeConnectHandler>::type, void(boost::system::error_code,
>     Iterator)>::return_type boost::beast::basic_stream<
>     <template-parameter-1-1>, <template-parameter-1-2>,
>     <template-parameter-1-3> >::async_connect(Iterator, Iterator,
>     IteratorCon
> 
> 
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> 
> 
> -- 
> Richard Hodges
> hodges.r_at_[hidden] <mailto:hodges.r_at_[hidden]>
> office: [phone]
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> 
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