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// { dg-do assemble }
template <class STRUCT, class MEMBER> inline STRUCT *
setback(MEMBER *bp, MEMBER STRUCT::*offset)
{
if(!bp) return 0;
union { int i; MEMBER STRUCT::*of; } u;
u.of = offset;
return (STRUCT *) ((__SIZE_TYPE__) bp - u.i);
}
struct S
{
int i;
};
int main()
{
S s;
S* sp = setback (&s.i, &S::i);
}
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