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shared_ptr.hpp: don't use fake objects

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This lifts the limitation for casting with abstract classes.
Use new C++20 feature (constexpr allocator) to test viability.
Add SamePtr concept to types.hpp
This commit is contained in:
Nekotekina 2021-05-29 11:21:57 +03:00
parent eec9578619
commit f5e529db61
4 changed files with 130 additions and 149 deletions
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49
rpcs3/stdafx.cpp
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@ -11,3 +11,52 @@ static_assert(be_t<u16>(1) + be_t<u32>(2) + be_t<u64>(3) == 6);
static_assert(le_t<u16>(1) + le_t<u32>(2) + le_t<u64>(3) == 6);
static_assert(sizeof(nullptr) == sizeof(void*));
static_assert(__cpp_constexpr_dynamic_alloc >= 201907L);
namespace
{
struct A
{
int a;
};
struct B : A
{
int b;
};
struct Z
{
};
struct C
{
virtual ~C() = 0;
int C;
};
struct D : Z, B
{
int d;
};
struct E : C, B
{
int e;
};
struct F : C
{
virtual ~F() = 0;
};
static_assert(is_same_ptr<B, A>());
static_assert(is_same_ptr<A, B>());
static_assert(is_same_ptr<D, B>());
static_assert(is_same_ptr<B, D>());
static_assert(!is_same_ptr<E, B>());
static_assert(!is_same_ptr<B, E>());
static_assert(is_same_ptr<F, C>());
static_assert(is_same_ptr<C, F>());
}