Oops, the subject line was not supposed to say 2/2 for this commit, and I
was not supposed to have Michael de Lang as the author ... I messed up my
git send-email and git cherry-pick commands!
Sorry Michael, I originally tried to use your tests from
https://github.com/Oipo/gcc/ but as noted in htt
From: Michael de Lang
Tested x86_64-linux, committed to trunk.
This is only supported for the cxx11 ABI, not for COW strings.
libstdc++-v3/ChangeLog:
* include/bits/basic_string.h (basic_string, operator""s): Add
constexpr for C++20.
(basic_string::basic_string(basic_s
