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// { dg-do run { target c++26 } }
#include <memory>
#include <scoped_allocator>
#include <utility>
#include <vector>
#ifndef __cpp_lib_polymorphic
# error __cpp_lib_polymorphic feature test macro missing in <memory>
#elif __cpp_lib_polymorphic != 202502
# error __cpp_lib_polymorphic feature test macro has wrong value in <memory>
#endif
#include <testsuite_hooks.h>
#include <testsuite_allocator.h>
struct Base {
friend constexpr
bool operator==(const Base& lhs, const Base& rhs)
{ return lhs.eq(rhs); }
virtual constexpr int
get_personality() const
{ return -1; }
private:
constexpr virtual bool
eq(const Base& other) const
{ return true; }
};
struct ObjDerived : Base
{
constexpr ObjDerived()
: x(0), y(0), z(0)
{ }
constexpr ObjDerived(int a, int b, int c)
: x(a), y(b), z(c)
{ }
virtual constexpr int
get_personality() const
{ return -2; }
private:
constexpr bool
eq(const Base& other) const override
{
if (auto op = dynamic_cast<const ObjDerived*>(&other))
return this->x == op->x && this->y == op->y && this->z == op->z;
return false;
}
int x;
int y;
int z;
};
template<typename T, typename Allocator>
struct VecDerived : Base, std::vector<T, Allocator>
{
using VecBase = std::vector<T, Allocator>;
using VecBase::VecBase;
constexpr int
get_personality() const override
{ return this->get_allocator().get_personality(); }
private:
constexpr bool
eq(const Base& other) const override
{
if (auto op = dynamic_cast<const VecDerived*>(&other))
return *static_cast<const VecBase*>(this)
== *static_cast<const VecBase*>(op);
return false;
}
};
using __gnu_test::uneq_allocator;
using UneqAlloc = uneq_allocator<int>;
using ScopedAlloc = std::scoped_allocator_adaptor<
uneq_allocator<Base>,
UneqAlloc>;
constexpr void
test_default_ctor()
{
using __gnu_test::default_init_allocator;
std::polymorphic<Base, default_init_allocator<Base>> i1;
default_init_allocator<int> a{};
// The contained object and the allocator should be value-initialized.
VERIFY( *i1 == Base() );
VERIFY( i1->get_personality() == -1 );
VERIFY( i1.get_allocator() == a );
a.state = 5;
// Allocator-extended default constructor:
std::polymorphic<Base, default_init_allocator<Base>> i2(std::allocator_arg, a);
VERIFY( *i1 == Base() );
VERIFY( i1->get_personality() == -1 );
}
constexpr void
test_forwarding_ctor()
{
const ObjDerived src(1, 2, 3);
std::polymorphic<Base> i1(src);
VERIFY( *i1 == src );
VERIFY( i1->get_personality() == -2 );
std::polymorphic<Base> i2(std::move(src));
VERIFY( *i2 == src );
VERIFY( i2->get_personality() == -2 );
ObjDerived obj = src;
std::polymorphic<Base> i3(obj);
VERIFY( *i3 == src );
VERIFY( i3->get_personality() == -2 );
std::polymorphic<Base> i4(std::move(obj));
VERIFY( *i4 == src );
VERIFY( i4->get_personality() == -2 );
if (std::is_constant_evaluated())
return;
const VecDerived<int, UneqAlloc> v{1, 2, 3, 4, 5};
// Object is constructed using allocator-aware constructor.
std::polymorphic<Base, ScopedAlloc>
i5(std::allocator_arg, ScopedAlloc(11, 22), v);
VERIFY( *i5 == v );
VERIFY( i5->get_personality() == 22 );
VERIFY( i5.get_allocator().get_personality() == 11 );
std::polymorphic<Base, ScopedAlloc>
i6(std::allocator_arg, ScopedAlloc(11, 22), auto(v));
VERIFY( *i6 == v );
VERIFY( i6->get_personality() == 22 );
VERIFY( i6.get_allocator().get_personality() == 11 );
}
constexpr void
test_inplace_ctor()
{
std::polymorphic<Base> i1(std::in_place_type<ObjDerived>);
VERIFY( *i1 == ObjDerived() );
VERIFY( i1->get_personality() == -2 );
std::polymorphic<Base> i2(std::in_place_type<ObjDerived>, 10, 20, 30);
VERIFY( *i2 == ObjDerived(10, 20, 30) );
VERIFY( i2->get_personality() == -2 );
std::polymorphic<Base, uneq_allocator<Base>>
i3(std::allocator_arg, 42, std::in_place_type<ObjDerived>);
VERIFY( *i3 == ObjDerived() );
VERIFY( i3->get_personality() == -2 );
VERIFY( i3.get_allocator().get_personality() == 42 );
std::polymorphic<Base, uneq_allocator<Base>>
i4(std::allocator_arg, 42, std::in_place_type<ObjDerived>, 10, 20, 30);
VERIFY( *i4 == ObjDerived(10, 20, 30) );
VERIFY( i4->get_personality() == -2 );
VERIFY( i4.get_allocator().get_personality() == 42 );
const VecDerived<int, UneqAlloc> ze;
const VecDerived<int, UneqAlloc> fe(5, 13);
const VecDerived<int, UneqAlloc> il{1, 2, 3 ,4};
std::polymorphic<Base>
i5(std::in_place_type<VecDerived<int, UneqAlloc>>, UneqAlloc{42});
VERIFY( *i5 == ze );
VERIFY( i5->get_personality() == 42 );
std::polymorphic<Base>
i6(std::in_place_type<VecDerived<int, UneqAlloc>>, 5, 13, UneqAlloc{42});
VERIFY( *i6 == fe );
VERIFY( i6->get_personality() == 42 );
std::polymorphic<Base>
i7(std::in_place_type<VecDerived<int, UneqAlloc>>, {1, 2, 3, 4}, UneqAlloc{42});
VERIFY( *i7 == il );
VERIFY( i7->get_personality() == 42 );
if (std::is_constant_evaluated())
return;
std::polymorphic<Base, ScopedAlloc>
i8(std::allocator_arg, ScopedAlloc(11, 22),
std::in_place_type<VecDerived<int, UneqAlloc>>);
VERIFY( *i8 == ze );
VERIFY( i8->get_personality() == 22 );
VERIFY( i8.get_allocator().get_personality() == 11 );
std::polymorphic<Base, ScopedAlloc>
i9(std::allocator_arg, ScopedAlloc(11, 22),
std::in_place_type<VecDerived<int, UneqAlloc>>, 5, 13);
VERIFY( *i9 == fe );
VERIFY( i9->get_personality() == 22 );
VERIFY( i9.get_allocator().get_personality() == 11 );
std::polymorphic<Base, ScopedAlloc>
i10(std::allocator_arg, ScopedAlloc(11, 22),
std::in_place_type<VecDerived<int, UneqAlloc>>, {1, 2, 3, 4});
VERIFY( *i10 == il );
VERIFY( i10->get_personality() == 22 );
VERIFY( i10.get_allocator().get_personality() == 11 );
}
int main()
{
test_default_ctor();
test_forwarding_ctor();
test_inplace_ctor();
static_assert([] {
test_default_ctor();
test_forwarding_ctor();
test_inplace_ctor();
return true;
}());
}
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