[PATCH] libstdc++: Fix up to_chars ppc64le _Float128 overloads [PR107636]

[Jonathan Wakely]

On Sat, 12 Nov 2022, 08:47 Jakub Jelinek via Libstdc++, <
libstdc++@gcc.gnu.org> wrote:

> Hi!
>
> As reported, I've misplaced __extension__ keywords in these cases
> (wanted not to have them on the whole inlines because _Float128 is
> completely standard now while __float128 is not, but before return
> it is a syntax error.
> I've verified on a short testcase that both g++ and clang++ accept
> __extension__ after return keyword.
>
> Bootstrapped/regtested on x86_64-linux and i686-linux (admittedly
> not powerpc64le-linux with new glibc), ok for trunk?
>

OK, thanks



> 2022-11-12  Jakub Jelinek  <jakub@redhat.com>
>
>         PR libstdc++/107636
>         * include/std/charconv (to_chars): Fix up powerpc64le _Float128
>         overload __extension__ placement.
>
> --- libstdc++-v3/include/std/charconv.jj        2022-11-11
> 08:15:45.696183293 +0100
> +++ libstdc++-v3/include/std/charconv   2022-11-11 16:32:52.992693605 +0100
> @@ -892,23 +892,25 @@ namespace __detail
>    inline to_chars_result
>    to_chars(char* __first, char* __last, _Float128 __value) noexcept
>    {
> -    __extension__
> -    return to_chars(__first, __last, static_cast<__float128>(__value));
> +    return __extension__ to_chars(__first, __last,
> +                                 static_cast<__float128>(__value));
>    }
>    inline to_chars_result
>    to_chars(char* __first, char* __last, _Float128 __value,
>            chars_format __fmt) noexcept
>    {
> -    __extension__
> -    return to_chars(__first, __last, static_cast<__float128>(__value),
> __fmt);
> +
> +    return __extension__ to_chars(__first, __last,
> +                                 static_cast<__float128>(__value), __fmt);
>    }
>    inline to_chars_result
>    to_chars(char* __first, char* __last, _Float128 __value,
>            chars_format __fmt, int __precision) noexcept
>    {
> -    __extension__
> -    return to_chars(__first, __last, static_cast<__float128>(__value),
> __fmt,
> -                   __precision);
> +
> +    return __extension__ to_chars(__first, __last,
> +                                 static_cast<__float128>(__value), __fmt,
> +                                 __precision);
>    }
>  #else
>    to_chars_result to_chars(char* __first, char* __last, _Float128 __value)
>
>         Jakub
>
>