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44 lines
1.1 KiB
44 lines
1.1 KiB
#pragma once
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#include <type_traits>
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template <typename T>
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struct pointer_wrapper{
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static_assert(std::is_object_v<T>, "T must be an object type");
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pointer_wrapper() noexcept = default;
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explicit pointer_wrapper(T* p) noexcept : ptr(p) {}
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explicit pointer_wrapper(T&& x) noexcept
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{
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T& ref = std::forward<T&&>(x);
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ptr = std::addressof(ref);
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}
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T& get() const noexcept { return *ptr; }
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auto operator->() const noexcept { return ptr; }
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operator T&() const noexcept { return *ptr; }
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auto operator*() const noexcept { return *ptr; }
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auto operator*() noexcept { return *ptr; }
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T copy() const noexcept { return *ptr; }
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auto raw() const noexcept -> T* { return ptr; }
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operator bool() const noexcept { return ptr != nullptr; }
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void clear() noexcept { ptr = nullptr; }
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private:
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T* ptr{nullptr};
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};
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template <typename T>
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auto make_pointer_wrapper(T* p) noexcept -> pointer_wrapper<T>
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{
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return pointer_wrapper<T>(p);
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}
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template <typename T>
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auto make_pointer_wrapper(T& x) noexcept -> pointer_wrapper<T>
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{
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return pointer_wrapper<T>(&x);
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}
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