Jan Engelhardt <jengelh@xxxxxxxxxx> writes:
> let's begin with some code, point in case here, a struct with an unnamed
> union:
>
> struct foo {
> int a;
> union {
> int x;
> };
> };
>
> Given this struct, it is possible to access the x by using ".x" on the
> struct:
>
> struct foo test;
> test.x = 7; /* works */
>
> So essentially it behaves as if the union was not there. So far so good.
This is a gcc extension. It is not part of standard C.
> But if one can use .x on the struct in this way, why is not it possible
> to do the same in a C99 named initializer list?
>
> struct foo test = {.x = 7}; /* fails */
>
> Seems kinda counter-intuitive. Did I spot a bug^W missing feature in the
> C99 standard?
The gcc extension has apparently not been extended to support C99
designated initializers.
Ian
