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// { dg-do compile { target c++17 } }
// { dg-options "-O2 -fno-exceptions -Wno-return-type" }
template <class a> struct b { typedef a *c; };
class e {};
template <typename a> class d {
public:
typedef typename b<a>::c c;
c begin();
c end();
};
struct f {
enum { g } h;
};
struct i {
d<f *> j();
};
struct l {
d<i *> k();
};
class ac;
class o {
public:
o(int *, int *, int *, ac *);
};
class ac {
public:
ac(e);
virtual o *ae(int *, int *, int *, int *);
};
class p {
void af(f *m) {
switch (m->h)
case f::g:
ag();
}
public:
void n() {
l ah;
for (i *ai : ah.k())
for (f *m : ai->j())
af(m);
}
virtual void ag() { __builtin_unreachable(); }
};
template <typename = int> class an : o {
public:
an(int *, int *, int *, int *, ac *);
};
class q : ac {
public:
q() : ac([]() -> e {}()) {}
o *ae(int *ap, int *aq, int *ar, int *as) { an(ap, aq, ar, as, this); }
};
template <typename at>
an<at>::an(int *, int *aq, int *ar, int *as, ac *au) : o(aq, ar, as, au) {
p().n();
}
void av() { new q; }
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