[cfe-dev] new warnings

[me22]

On Thu, Sep 25, 2008 at 22:39, Mike Stump <mrs at apple.com> wrote:
>
> class DeclGroupRef {
>   uintptr_t ThePtr;
>
>
>   iterator begin() {
>     if (getKind() == DeclKind)
>       return ThePtr ? (Decl**) &ThePtr : 0;
>
> ?  You think that is safe?  Why?  I don't see any unions, I don't see
> any memcpys, no character types.
>

That's a reinterpret_cast, so my understanding is that it's legal iff
ThePtr was originally set by a reinterpret_cast from something with
static type Decl**.