65 lines
1.2 KiB
C
65 lines
1.2 KiB
C
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//
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// Created by Administrator on 2021/4/30.
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//
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#ifndef SYNTAXPARSER_ITEMCOLLECTION_H
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#define SYNTAXPARSER_ITEMCOLLECTION_H
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#include <fstream>
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#include <iostream>
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#include <algorithm>
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#include <functional>
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#include <Item.h>
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#include <GrammarResourcePool.h>
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class ItemCollectionManager;
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class ItemCollection{
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int index = 0;
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std::map<size_t, Item *> items;
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std::vector<Item *> cache;
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GrammarResourcePool *pool;
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friend ItemCollectionManager;
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template <class T>
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inline void hash_combine(std::size_t& seed, const T& v) const
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{
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std::hash<T> hasher;
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seed ^= hasher(v) + 0x9e3779b9 + (seed<<6) + (seed>>2);
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}
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static bool compare_item_ptr(const Item* lhs, const Item* rhs);
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public:
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explicit ItemCollection(GrammarResourcePool *pool) : pool(pool) {
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}
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[[nodiscard]] const std::vector<Item *> &getItems() const {
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return cache;
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}
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[[nodiscard]] int getIndex() const {
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return index;
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}
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bool addItem(const Production *p_pdt, int dot_index, int terminator, bool generated = false);
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void CLOSURE();
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void print(std::wofstream &output) const;
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[[nodiscard]] size_t getHash() const;
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};
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#endif //SYNTAXPARSER_ITEMCOLLECTION_H
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