更改字符集
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EmsiaetKadosh
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//
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// Created by EmsiaetKadosh on 25-3-4.
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//
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#pragma once
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template <typename T, typename L = void>
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class AnywhereEditable;
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template <typename T, typename L = void>
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class AnywhereEditableList;
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template <typename T, typename L = void>
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class AnywhereIterator;
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class AnywhereIteratorEnd;
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/**
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* 此处无法进行代码编译层面的直接约束
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* @tparam T 满足T extends AnywhereEditable<T, L>
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* @tparam L 满足L extends AnywhereEditableList<T, L>
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*/
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template <typename T, typename L>
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class AnywhereEditable {
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public:
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using Lst = std::conditional_t<std::is_same_v<L, void>, AnywhereEditableList<T, L>, L>;
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private:
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friend class AnywhereIterator<T, L>;
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friend class AnywhereEditableList<T, L>;
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friend class AnywhereIteratorEnd;
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friend L;
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AnywhereEditable* prev = nullptr;
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AnywhereEditable* next = nullptr;
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AnywhereEditableList<T, L>* list = nullptr; // 指示自身属于某个列表
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protected:
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bool managedByList = false; // 指示是否在列表内管理内存，而非列表外管理内存
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byte reserved[7]{}; // reserved[0]: Task::schedulePop
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public:
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AnywhereEditable() = default;
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AnywhereEditable(const AnywhereEditable& other) {}
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AnywhereEditable(AnywhereEditable&& other) noexcept : prev(other->prev), next(other->next), list(other->list) {
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other->prev = nullptr;
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other->next = nullptr;
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other->list = nullptr;
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}
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virtual ~AnywhereEditable() {
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if (list) {
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managedByList = false;
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auto lst = list;
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list = nullptr;
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lst->pop(static_cast<T*>(this));
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Logger.warn(L"~AnywhereEditable() : 析构时没有清除list，导致了析构时pop");
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}
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}
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int pushCopy(AnywhereEditableList<T, L>& list) noexcept;
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int pushThis(AnywhereEditableList<T, L>& list) noexcept;
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virtual int pop() noexcept;
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AnywhereEditableList<T, L>* getContainer() const noexcept { return list; }
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};
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template <typename T, typename L>
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class AnywhereIterator {
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friend class AnywhereIteratorEnd;
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AnywhereEditable<T, L>* current;
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public:
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explicit AnywhereIterator(AnywhereEditable<T, L>* current) : current(current) {}
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AnywhereIterator(const AnywhereIterator& other) = default;
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T& operator*() noexcept(false) {
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if (current->next) return static_cast<T&>(*current);
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throw RuntimeException(L"AnywhereIterator::operator*() : next is null, end of list");
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}
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T* operator->() noexcept(false) {
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if (current->next) return &static_cast<T&>(*current);
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throw RuntimeException(L"AnywhereIterator::operator*() : next is null, end of list");
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}
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bool operator!=(const AnywhereIterator& other) const noexcept { return current != other.current; }
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bool operator==(const AnywhereIterator& other) const noexcept { return current == other.current; }
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bool operator!=(const AnywhereIteratorEnd& other) const noexcept;
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bool operator==(const AnywhereIteratorEnd& other) const noexcept;
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AnywhereIterator& operator++() noexcept(false) {
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if (current->next) current = current->next;
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else throw InvalidOperationException(L"AnywhereIterator::operator++() : end of list");
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return *this;
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}
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AnywhereIterator operator++(int) noexcept(false) {
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if (current->next) {
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AnywhereIterator ret = *this;
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current = current->next;
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return ret;
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}
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throw InvalidOperationException(L"AnywhereIterator::operator++() : end of list");
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}
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AnywhereIterator& operator--() noexcept(false) {
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if (current->prev) current = current->prev;
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else throw InvalidOperationException(L"AnywhereIterator::operator--() : begin of list");
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return *this;
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}
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AnywhereIterator operator--(int) noexcept(false) {
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if (current->prev) {
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AnywhereIterator ret = *this;
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current = current->prev;
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return ret;
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}
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throw InvalidOperationException(L"AnywhereIterator::operator--() : begin of list");
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}
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};
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class AnywhereIteratorEnd {
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public:
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AnywhereIteratorEnd() {}
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AnywhereIteratorEnd(const AnywhereIteratorEnd& other) = delete;
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AnywhereIteratorEnd(AnywhereIteratorEnd&& other) = delete;
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template <typename T, typename L>
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bool operator!=(const AnywhereIterator<T, L>& other) const noexcept { return other.current && other.current->next; }
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template <typename T, typename L>
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bool operator==(const AnywhereIterator<T, L>& other) const noexcept { return !operator!=(other); }
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};
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template <typename T, typename L>
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class AnywhereEditableList {
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protected:
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AnywhereEditable<T, L> head;
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AnywhereEditable<T, L> tail;
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public:
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AnywhereEditableList() {
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head.next = &tail;
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tail.prev = &head;
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}
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virtual ~AnywhereEditableList() { for (AnywhereIterator<T, L> it = begin(); it != end(); ++it) {} }
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int pushCopy(T* value) noexcept;
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int pushThis(T* value) noexcept;
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int pushNewed(T* value) noexcept;
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virtual int pop(T* value) noexcept;
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AnywhereIterator<T, L> begin() noexcept { return AnywhereIterator<T, L>(head.next); }
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AnywhereIteratorEnd end() noexcept { return AnywhereIteratorEnd(); }
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AnywhereIterator<T, L> begin() const noexcept { return AnywhereIterator<T, L>(head.next); }
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AnywhereIteratorEnd end() const noexcept { return AnywhereIteratorEnd(); }
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AnywhereEditable<T, L>* front() const noexcept { return head.next == &tail ? nullptr : head.next; }
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AnywhereEditable<T, L>* back() const noexcept { return tail.prev == &head ? nullptr : tail.prev; }
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};
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template <typename T, typename L>
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int AnywhereEditable<T, L>::pushCopy(AnywhereEditableList<T, L>& list) noexcept { return list.pushCopy(static_cast<T*>(this)); }
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template <typename T, typename L>
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int AnywhereEditable<T, L>::pushThis(AnywhereEditableList<T, L>& list) noexcept { return list.pushThis(static_cast<T*>(this)); }
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template <typename T, typename L>
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int AnywhereEditable<T, L>::pop() noexcept { return list->pop(static_cast<T*>(this)); }
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template <typename T, typename L>
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bool AnywhereIterator<T, L>::operator!=(const AnywhereIteratorEnd& other) const noexcept { return other != *this; }
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template <typename T, typename L>
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bool AnywhereIterator<T, L>::operator==(const AnywhereIteratorEnd& other) const noexcept { return other == *this; }
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template <typename T, typename L>
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int AnywhereEditableList<T, L>::pushCopy(T* value) noexcept {
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T* nv = new T(*value);
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return pushNewed(nv);
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}
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template <typename T, typename L>
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int AnywhereEditableList<T, L>::pushThis(T* value) noexcept {
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if (value->list) {
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Logger.error(L"AnywhereEditableList::pushThis() : value is already in a list");
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Failed();
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}
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value->list = this;
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tail.prev->next = value;
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value->prev = tail.prev;
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value->next = &tail;
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tail.prev = value;
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Success();
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}
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template <typename T, typename L>
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int AnywhereEditableList<T, L>::pushNewed(T* value) noexcept {
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const int ret = pushThis(value);
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if (ret) delete value;
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else value->managedByList = true;
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return ret;
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}
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template <typename T, typename L>
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int AnywhereEditableList<T, L>::pop(T* value) noexcept {
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if (value->list != this) {
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Logger.error(L"AnywhereEditableList::pop() : value is not in this list");
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Failed();
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}
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value->list = nullptr;
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value->next->prev = value->prev;
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value->prev->next = value->next;
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if (value->managedByList) delete value;
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Success();
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}
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