[Bug translator/11598] @defined() with @cast() oddity

[jistone at redhat dot com]

------- Additional Comments From jistone at redhat dot com  2010-05-13 21:23 -------
(In reply to comment #0)
>     printf("%d\n", &@cast(0, "task_struct", "kernel<linux/sched.h>")->rcu)      
>     printf("%d\n", @defined(@cast(0, "task_struct", "kernel<linux/sched.h>")->rcu)
>            ? 1 : 0)                                                            

> I don't see why the last @defined is coming out false instead of true (like the
> 1st @defined).

It's because @defined works by checking whether the $target of @cast would
normally be a valid access.  If you tried this case, you'd get:

  semantic error: 'struct rcu_head' is being accessed instead of a member

That's why the printf still works with a '&' in front -- just use the same
thing: @defined(&@cast(...)->rcu)

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             Status|NEW                         |WAITING


http://sourceware.org/bugzilla/show_bug.cgi?id=11598

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