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// PR c++/108437
// { dg-do run { target c++23 } }
struct S { static int &operator[] (int x) { static int a[2]; return a[x]; } };
struct U { static int &operator[] (int x, int y, int z) { static int a[2]; return a[x + y + z]; } };
struct V { static int &operator[] () { static int a; return a; } };
int cnt;
template <typename T>
T &
bar (T &x)
{
++cnt;
return x;
}
template <class T, class W, class X> void
foo ()
{
S s;
bar (s)[0]++;
T t;
bar (t)[0]++;
U u;
bar (u)[0, 0, 0]++;
V v;
bar (v)[]++;
W w;
bar (w)[0, 0, 0]++;
X x;
bar (x)[]++;
}
int
main ()
{
S::operator[] (0) = 1;
U::operator[] (0, 0, 0) = 2;
V::operator[] () = 3;
foo <S, U, V> ();
if (S::operator[] (0) != 3 || U::operator[] (0, 0, 0) != 4 || V::operator[] () != 5 || cnt != 6)
__builtin_abort ();
}
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