On Mon, 23 Mar 2020 at 17:09, David P. Riedel via Boost-users <boost-users@lists.boost.org> wrote:
Hi
 ...
 
Are beast and asio not concepts ready? Or am I missing something?  Is
there some flag I need to set?


My set up:

boost: 1.72
gcc: 9.3

I added -std=c++2a -fconcepts  to compile flags in my user-config.jam
file to enable compiler concepts support.


Are these the only criteria to reproduce the problem, or is there something else I should know about the setup prior to investigating?
 
I have no problems using these compiler flags with other non-boost code.


Thanks


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