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Import all this stuff into a single repo called Serenity.
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94
AK/OwnPtr.h
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94
AK/OwnPtr.h
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#pragma once
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#include <cstddef>
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#include <utility>
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namespace AK {
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template<typename T>
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class OwnPtr {
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public:
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OwnPtr() { }
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explicit OwnPtr(T* ptr) : m_ptr(ptr) { }
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OwnPtr(OwnPtr&& other) : m_ptr(other.leakPtr()) { }
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template<typename U> OwnPtr(OwnPtr<U>&& other) : m_ptr(static_cast<T*>(other.leakPtr())) { }
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~OwnPtr() { clear(); }
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OwnPtr(std::nullptr_t) { };
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OwnPtr& operator=(OwnPtr&& other)
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{
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if (this != &other) {
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delete m_ptr;
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m_ptr = other.leakPtr();
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}
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return *this;
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}
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template<typename U>
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OwnPtr& operator=(OwnPtr<U>&& other)
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{
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if (this != static_cast<void*>(&other)) {
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delete m_ptr;
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m_ptr = other.leakPtr();
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}
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return *this;
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}
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OwnPtr& operator=(T* ptr)
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{
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if (m_ptr != ptr)
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delete m_ptr;
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m_ptr = ptr;
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return *this;
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}
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OwnPtr& operator=(std::nullptr_t)
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{
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clear();
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return *this;
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}
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void clear()
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{
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delete m_ptr;
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m_ptr = nullptr;
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}
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bool operator!() const { return !m_ptr; }
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typedef T* OwnPtr::*UnspecifiedBoolType;
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operator UnspecifiedBoolType() const { return m_ptr ? &OwnPtr::m_ptr : nullptr; }
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T* leakPtr()
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{
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T* leakedPtr = m_ptr;
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m_ptr = nullptr;
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return leakedPtr;
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}
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T* ptr() { return m_ptr; }
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const T* ptr() const { return m_ptr; }
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T* operator->() { return m_ptr; }
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const T* operator->() const { return m_ptr; }
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T& operator*() { return *m_ptr; }
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const T& operator*() const { return *m_ptr; }
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operator bool() { return !!m_ptr; }
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private:
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T* m_ptr = nullptr;
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};
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template<class T, class... Args> inline OwnPtr<T>
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make(Args&&... args)
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{
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return OwnPtr<T>(new T(std::forward<Args>(args)...));
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}
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}
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using AK::OwnPtr;
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using AK::make;
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