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// { dg-do run { target c++11 } }
// { dg-options "" }
struct A { int i; long long j; } a[64];
A b[32];
template <typename T>
void
foo (T &b)
{
int i = 0;
for (auto &x : a)
{
x.i = i;
x.j = 2 * i++;
}
for (auto & [ x, y ] : a) // { dg-warning "decomposition declaration only available with" "" { target c++14_down } }
{
x += 2;
y += 3;
}
i = 0;
for (const auto [ u, v ] : a) // { dg-warning "decomposition declaration only available with" "" { target c++14_down } }
{
if (u != i + 2 || v != 2 * i++ + 3)
__builtin_abort ();
}
i = 0;
for (auto [ x, y ] : a) // { dg-warning "decomposition declaration only available with" "" { target c++14_down } }
{
x += 4;
y += 5;
if (x != i + 6 || y != 2 * i++ + 8)
__builtin_abort ();
}
i = 0;
for (const auto x : a)
{
if (x.i != i + 2 || x.j != 2 * i++ + 3)
__builtin_abort ();
}
i = 0;
for (auto &x : b)
{
x.i = i;
x.j = 2 * i++;
}
for (auto & [ x, y ] : b) // { dg-warning "decomposition declaration only available with" "" { target c++14_down } }
{
x -= 2;
y -= 3;
}
i = 0;
for (const auto [ u, v ] : b) // { dg-warning "decomposition declaration only available with" "" { target c++14_down } }
{
if (u != i - 2 || v != 2 * i++ - 3)
__builtin_abort ();
}
i = 0;
for (auto [ x, y ] : b) // { dg-warning "decomposition declaration only available with" "" { target c++14_down } }
{
x -= 4;
y -= 5;
if (x != i - 6 || y != 2 * i++ - 8)
__builtin_abort ();
}
i = 0;
for (const auto x : b)
{
if (x.i != i - 2 || x.j != 2 * i++ - 3)
__builtin_abort ();
}
}
int
main ()
{
foo (b);
for (int i = 0; i < 64; i++)
{
if (a[i].i != i + 2 || a[i].j != 2 * i + 3)
__builtin_abort ();
if (i >= 32)
continue;
if (b[i].i != i - 2 || b[i].j != 2 * i - 3)
__builtin_abort ();
}
}
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