https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100676
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |11.2
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Using __builtin_unreachable works, and the diagnostic seems acceptable:
In file included from /home/jwakely/gcc/12/include/c++/12.0.0/iosfwd:38,
from /home/jwakely/gcc/12/include/c++/12.0.0/string_view:40,
from sv.C:1:
sv.C:5:21: in 'constexpr' expansion of 'f()'
sv.C:3:56: in 'constexpr' expansion of
's.std::basic_string_view<char>::front()'
/home/jwakely/gcc/12/include/c++/12.0.0/string_view:251:9: error:
'__builtin_unreachable()' is not a constant expression
251 | __glibcxx_assert(this->_M_len > 0);
| ^~~~~~~~~~~~~~~~
