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#pragma once
#include "borrowed-ptr.hpp"
#ifdef FM_NO_WEAK_BPTR
#error weak_bptr not supported!
#endif
namespace floormat {
template<typename T>
class weak_bptr final
{
detail_bptr::control_block* blk;
static detail_bptr::control_block* _copy(detail_bptr::control_block* ptr);
weak_bptr& _copy_assign(detail_bptr::control_block* other) noexcept;
weak_bptr& _move_assign(detail_bptr::control_block*& other) noexcept;
public:
weak_bptr(std::nullptr_t) noexcept;
weak_bptr& operator=(std::nullptr_t) noexcept;
weak_bptr() noexcept;
~weak_bptr() noexcept;
template<detail_bptr::DerivedFrom<T> Y> weak_bptr(const bptr<Y>& ptr) noexcept;
template<detail_bptr::DerivedFrom<T> Y> weak_bptr(const weak_bptr<Y>& ptr) noexcept;
weak_bptr(const weak_bptr& ptr) noexcept;
template<detail_bptr::DerivedFrom<T> Y> weak_bptr& operator=(const bptr<Y>& ptr) noexcept;
template<detail_bptr::DerivedFrom<T> Y> weak_bptr& operator=(const weak_bptr<Y>& ptr) noexcept;
weak_bptr& operator=(const weak_bptr& ptr) noexcept;
template<detail_bptr::DerivedFrom<T> Y> weak_bptr(weak_bptr<Y>&& ptr) noexcept;
weak_bptr(weak_bptr&& ptr) noexcept;
template<detail_bptr::DerivedFrom<T> Y> weak_bptr& operator=(weak_bptr<Y>&& ptr) noexcept;
weak_bptr& operator=(weak_bptr&& ptr) noexcept;
void reset() noexcept;
void swap(weak_bptr& other) noexcept;
uint32_t use_count() const noexcept;
bool expired() const noexcept;
bptr<T> lock() const noexcept;
bool operator==(const weak_bptr<const T>& other) const noexcept;
};
} // namespace floormat
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