[Bug libstdc++/107649] New std::complex specializations are never used

["cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107649

--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jakub Jelinek <jakub@gcc.gnu.org>:

https://gcc.gnu.org/g:0e2c5510e001e5ccbde9e4b7df757e2bba2fdb00

commit r13-4096-g0e2c5510e001e5ccbde9e4b7df757e2bba2fdb00
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Wed Nov 16 14:45:40 2022 +0100

    libstdc++: Fix up <complex> for extended floating point types [PR107649]

    As filed by Jonathan in the PR, I've screwed up the requires syntax
    in the extended floating point specialization:
    -    requires(__complex_type<_Tp>::type)
    +    requires requires { typename __complex_type<_Tp>::type; }
    and doing this change resulted in lots of errors because __complex_whatever
    overfloads from extended floating point types were declared after the
    templates which used them.

    The following patch fixes that.

    Bootstrapped/regtested on x86_64-linux and i686-linux, additionally
    I've tested that with _GLIBCXX_HAVE_FLOAT128_MATH not being defined
    while __STDCPP_FLOAT128_T__ defined one can still use
    std::complex<std::float128_t> for basic arithmetic etc., just one can't
    expect std::sin etc. to work in that case (because we don't have any
    implementation).

    2022-11-16  Jakub Jelinek  <jakub@redhat.com>
                Jonathan Wakely  <jwakely@redhat.com>

            PR libstdc++/107649
            * include/std/complex (__complex_abs, __complex_arg, __complex_cos,
            __complex_cosh, __complex_exp, __complex_log, __complex_sin,
            __complex_sinh, __complex_sqrt, __complex_tan, __complex_tanh,
            __complex_pow): Move __complex__ _Float{16,32,64,128} and
            __complex__ decltype(0.0bf16) overloads earlier in the file.
            (complex): Fix up requires on the partial specialization for
extended
            float types.
            (__complex_acos, __complex_asin, __complex_atan, __complex_acosh,
            __complex_asinh, __complex_atanh): Move
            __complex__ _Float{16,32,64,128} and __complex__ decltype(0.0bf16)
            overloads earlier in the file.