You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
55 lines
1.3 KiB
55 lines
1.3 KiB
#pragma once
|
|
|
|
#include <type_traits>
|
|
|
|
template <typename T>
|
|
struct alignas(8) pointer_wrapper {
|
|
static_assert(std::is_object_v<T>, "T must be an object type");
|
|
|
|
pointer_wrapper() noexcept = default;
|
|
|
|
explicit pointer_wrapper(T* p) noexcept : ptr(p) {}
|
|
|
|
explicit pointer_wrapper(T&& x) noexcept
|
|
{
|
|
T& ref = std::forward<T&&>(x);
|
|
ptr = std::addressof(ref);
|
|
}
|
|
|
|
T& get() const noexcept { return *ptr; }
|
|
|
|
auto operator->() const noexcept { return ptr; }
|
|
|
|
operator T&() const noexcept { return *ptr; }
|
|
|
|
auto operator*() const noexcept { return *ptr; }
|
|
|
|
auto operator*() noexcept { return *ptr; }
|
|
|
|
T copy() const noexcept { return *ptr; }
|
|
|
|
auto raw() const noexcept -> T* { return ptr; }
|
|
|
|
operator bool() const noexcept { return ptr != nullptr; }
|
|
|
|
void clear() noexcept { ptr = nullptr; }
|
|
|
|
bool operator==(const pointer_wrapper<T>& other) const noexcept { return ptr == other.ptr; }
|
|
|
|
bool operator!=(const pointer_wrapper<T>& other) const noexcept { return ptr != other.ptr; }
|
|
|
|
private:
|
|
T* ptr{nullptr};
|
|
};
|
|
|
|
template <typename T>
|
|
auto make_pointer_wrapper(T* p) noexcept -> pointer_wrapper<T>
|
|
{
|
|
return pointer_wrapper<T>(p);
|
|
}
|
|
|
|
template <typename T>
|
|
auto make_pointer_wrapper(T& x) noexcept -> pointer_wrapper<T>
|
|
{
|
|
return pointer_wrapper<T>(&x);
|
|
}
|