57 lines
823 B
C++
57 lines
823 B
C++
/**
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* @file dl_array_enum.h
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* @brief array使用枚举类作为索引的封装
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*
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*
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* @version 1.0
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* @author lveyou
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* @date 22-06-27
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*
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* @note malloc不会调用构造函数
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* @note 访问尾后指针是合法的
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*/
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#pragma once
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#include <cassert>
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namespace dl
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{
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//! 枚举类数组
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template<typename V, auto N>
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class ArrayEnum
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{
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public:
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using E = decltype(N);
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/**
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* @brief 返回位置元素，debug版本检查越界
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*/
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V& operator[](E e)
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{
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#ifndef NDEBUG
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assert(CheckRange(e));
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#endif
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return _data[(size_t)e];
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}
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V& operator[](size_t index)
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{
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return operator[](E(index));
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}
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//! 越界检查
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bool CheckRange(E e)
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{
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return (size_t)e < (size_t)N;
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}
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size_t size() { return (size_t)N; }
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V* begin() { return _data; }
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V* end() { return _data + (size_t)N; }
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private:
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V _data[(size_t)N];
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};
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}
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