[cfe-commits] r113018 - in /cfe/trunk: lib/Sema/SemaDecl.cpp test/SemaCXX/flexible-array-test.cpp

Anders Carlsson andersca at mac.com
Wed Sep 8 19:12:30 PDT 2010

Sep 6, 2010 kl. 9:49 PM skrev Francois Pichet:

> Any reason to to disallow flexible array element in union?
> Both gcc 4.5 and msvc allow it. For example:
> struct A
> {
>    int   Length;
>    union
>    {
>        char   dataC[];
>        short  dataS[];
>        long   dataL[];
>    };
> };

Hi Francois,

the reason for it was that it doesn't make sense to have a single union with a flexible array element, for example:

union A {
	int a;
	char[] b;

but I definitely agree that having them in unions is OK as long as they're nested inside another struct (and all fields are flexible array members etc).

- Anders


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