[cfe-dev] Is this a bug? _Static_assert() failed although __has_feature(c_static_assert) is false

[Richard Smith]

On Fri, Jul 19, 2013 at 4:18 PM, Gao, Yunzhong <
yunzhong_gao at playstation.sony.com> wrote:

>  Hi,
> When compiling the following test program on my Ubuntu machine, I get a
> compile-time error:
>
> /* test.c */
> #if __has_feature(c_static_assert)
> #pragma message("HAS_STATIC_ASSERT")
> #else
> _Static_assert(1==0,"");  // if there is no static assert support
> #endif
> /* end of test.c */
>
> $ install/bin/clang -S -o - test.c
> test.c:4:1: error: static_assert failed ""
> _Static_assert(1==0,"");
> ^              ~~~~
> 1 error generated.
>
> Since __has_feature(c_static_assert) is false, I would not expect
> _Static_assert() to be enabled here. Should I file a clang bug?
>

No; we support _Static_assert as an extension. See
__has_extension(c_static_assert).


> Thanks,
> - Gao.
>
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>
>
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