blob: 2e5ea0e7eb4306d7f94be26a9c8f9123be0afd92 [file] [log] [blame]
// PR c++/88337 - Implement P1327R1: Allow dynamic_cast/typeid in constexpr.
// { dg-do compile { target c++20 } }
// Downcast, with hint > 0.
struct B {
virtual void baz () {}
};
struct B2 {
virtual void baz2 () {}
};
struct D : B, B2 { };
constexpr bool
fn ()
{
// try &/&&, add address test
bool ok = true;
B2 b;
B2 *b1 = &b;
if (D *pd = dynamic_cast<D*>(b1))
ok = false;
D d;
B2 *b2 = &d;
if (D *pd = dynamic_cast<D*>(b2))
/*OK*/;
else
ok = false;
return ok;
}
static_assert(fn ());
constexpr D d;
constexpr B2 *b = const_cast<D*>(&d);
static_assert(dynamic_cast<D*>(b) == &d);
static_assert(&dynamic_cast<D&>(*b) == &d);