58 lines
1.5 KiB
C++
58 lines
1.5 KiB
C++
#pragma once
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#include<string.h>
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namespace hgl
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{
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/**
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* 比较处理模板基类
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*/
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template<typename T> class Comparator ///比较处理模板基类
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{
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public:
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/**
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* 比较函数，需被特例化或派生实现. 正确情况下此函数不应该会被调用
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*/
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virtual const int compare(const T &other)const=0;
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const bool operator > (const T &i)const{return compare(i)>0;}
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const bool operator < (const T &i)const{return compare(i)<0;}
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const bool operator >=(const T &i)const{return compare(i)>=0;}
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const bool operator <=(const T &i)const{return compare(i)<=0;}
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const bool operator ==(const T &i)const{return compare(i)==0;}
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const bool operator !=(const T &i)const{return compare(i)!=0;}
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};//class Comparator
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template<typename T> class ComparatorData:public Comparator<T>
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{
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public:
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const int compare(const T &other)const override final
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{
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return memcmp(this,&other,sizeof(T));
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}
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};//class ComparatorData
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template<typename T> class ItemComparator
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{
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public:
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static const int compare(const T &a,const T &b);
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static void cpy(T *dst,const T *src)
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{
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memcpy(dst,src,sizeof(T));
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}
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static void exchange(T &a,T &b)
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{
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T temp;
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cpy(&temp,&a);
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cpy(&a,&b);
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cpy(&b,&temp);
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}
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};
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}//namespace hgl
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