Re: [Glsdk-devel] The use of anonymous structures

[Stefanos A. <sta...@gm...>]

On Sun, Aug 24, 2008 at 6:31 AM, Branan Riley <br...@gm...> wrote:
>         Could be a different version of MSVC giving different
>         warnings.

Actually no, just stricter warnings (warning level 4, where the default
is 3). GCC doesn't produce any warnings even with -Wall.

However, please note that the anonymous union is *not* valid C89 (fails
to compile with "gcc -ansi"). I'm not saying this is a problem (//-style
comments aren't valid C89 either), just something to keep in mind and
document.

// Not valid C89
union
{
    float data[2];
    struct { float x, y; };
};

/* Valid C89 */
union foo_union
{
    float data[2];
    struct bar_struct { float x, y; } bar;
} foo;

Anyone knows if these have been standardized in C99?