Bug in <complex> header in trunk from malformed "requires" statement, causes compilation errors if included

[Jonathan Wakely]

On Fri, 18 Nov 2022 at 18:59, Gavin Ray via Libstdc++
<libstdc++@gcc.gnu.org> wrote:
>
> Hello all,
>
> Hit a very confusing bug this morning. I'm using Clang with GCC
> upstream libstdc++ from jwakely's repo.
> The following program fails to compile:
>
> #include <complex>
> int main() { return 0; }
>
> It appears there was an initial commit which added "requires" clauses,
> and then a fixup commit later:
> - libstdc++: Fix up <complex> for extended floating point types
> [PR107649] · gcc-mirror/gcc@0e2c551 (github.com)

Yes, that was https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107649 but
isn't included in my gcc-latest builds yet.

>
> But there seems to be one last malformed "requires" statement in trunk:
> https://github.com/gcc-mirror/gcc/blob/59cc4da605e5cb8e31e9f1d54ef2b5ba47fc8f88/libstdc%2B%2B-v3/include/std/complex#L2531

Thanks.