Announce plan to require C++17 after Boost 1.80

From: Mateusz Loskot (mateusz_at_[hidden])
Date: 2022-06-26 12:23:20

Hi Folks,

We are announcing the plan about switching to C++17
some times soonish after Boost 1.80
https://github.com/boostorg/gil/pull/694

Best regards,
-- 
Mateusz Loskot, http://mateusz.loskot.net