[PATCH v2] [PR105324] libstdc++: testsuite: pr105324 requires FP from_char

[Jonathan Wakely]

On Tue, 3 May 2022, 18:26 Alexandre Oliva, <oliva@adacore.com> wrote:

> On May  3, 2022, Jonathan Wakely <jwakely.gcc@gmail.com> wrote:
>
> > That macro should start with two underscores.
>
> Doh!  Wow, eagle eyes!  :-)  Good catch, thanks!
>
> Here's the corrected patch I'm installing, trunk for now, 12 and 11 once
> it's allowed in 12.
>

Great, thanks.


> > OK for trunk and gcc-11 with that change.
>
> > gcc-12 branch needs RM approval. OK for 12.2 if not approved for 12.1
>
>
> [PR105324] libstdc++: testsuite: pr105324 requires FP from_char
>
> From: Alexandre Oliva <oliva@adacore.com>
>
> The floating-point overloads of from_char are only declared if
> _GLIBCXX_HAVE_USELOCALE is #defined as nonzero.  That's exposed from
> charconv as __cpp_lib_to_chars >= 201611L, so guard the test body with
> that.
>
>
> for  libstdc++-v3/ChangeLog
>
>         PR c++/105324
>         * testsuite/20_util/from_chars/pr105324.cc: Guard test body
>         with conditional for floating-point overloads of from_char.
> ---
>  .../testsuite/20_util/from_chars/pr105324.cc       |    2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/libstdc++-v3/testsuite/20_util/from_chars/pr105324.cc
> b/libstdc++-v3/testsuite/20_util/from_chars/pr105324.cc
> index cecb17e41cc68..ef24b4c5c7b71 100644
> --- a/libstdc++-v3/testsuite/20_util/from_chars/pr105324.cc
> +++ b/libstdc++-v3/testsuite/20_util/from_chars/pr105324.cc
> @@ -5,10 +5,12 @@
>
>  int main()
>  {
> +#if __cpp_lib_to_chars >= 201611L // FP from_char not available otherwise.
>    // PR libstdc++/105324
>    // std::from_chars() assertion at floating_from_chars.cc:78
>    std::string s(512, '1');
>    s[1] = '.';
>    long double d;
>    std::from_chars(s.data(), s.data() + s.size(), d);
> +#endif
>  }
>
>
> --
> Alexandre Oliva, happy hacker                https://FSFLA.org/blogs/lxo/
>    Free Software Activist                       GNU Toolchain Engineer
> Disinformation flourishes because many people care deeply about injustice
> but very few check the facts.  Ask me about <https://stallmansupport.org>
>