https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120554
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at gcc dot gnu.org,
| |mpolacek at gcc dot gnu.org
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So, seems g++ rejects #c6 with -std=c++11, and accepts it for -std=c++1y and
above since r6-7277-gb47d1d904d5397a61bba40fba095f02bd00f04c1.
While clang++ accepts it only for -std=c++23.
C++20 (looking at N4849) has in [class.copy.assign]/10
The implicitly-defined copy/move assignment operator is constexpr if
...
X is a literal type, and
...
but unsure where it is specified one can't mark it constexpr on explicit
defaulted declaration.
This later changed e.g. with https://wg21.link/p2448r2 and
https://wg21.link/p2706r0
Anyway, on the libgcobol side, I'd just suggest dropping constexpr, if it is
not literal type, constexpr for copy assignment makes no sense for it.
