blob: 69ee83c7df5bd6f6077b461d1a7f4aea562d1e0f [file] [log] [blame]
// { dg-do assemble }
template <class STRUCT, class MEMBER> inline STRUCT *
setback(MEMBER *bp, MEMBER STRUCT::*offset)
{
// The implementation of this function may be platform dependend
if(!bp) return 0; // NULL pointers remain NULL
union { int i; MEMBER STRUCT::*of; } u; // Switch types. Casting won't work.
u.of = offset;
return (STRUCT *) ((int) bp - u.i);
}