boost的operators

/* [e-mail] www.gaimo.net 02.15.2009*///dev c++//boost operators. #include <cstdlib>#include <iostream>#include <boost/operators.hpp>using namespace std;using namespace boost; //less_tahn_comparable//equality_comparable//addable //subtractable //rable for | and |=//andable & and &=//incrementable ++ //decrementable --//equivalent < ad ==//dereferenceable -> and *//indexable [] //totally_ordered//additve//...class some_class: equivalent<some_class>{public: some_class(int _value): value(_value){} bool less_than(const some_class & other)const { return value < other.value; } private: int value; }; bool operator< (const some_class &lhs, const some_class &rhs) { return lhs.less_than(rhs); } int main(int argc, char *argv[]){ some_class s1(1); some_class s2(-1); if(s1==s2) cout<<"s1==s2"<<endl; else cout<<"s1!=s2"<<endl; system("PAUSE"); return EXIT_SUCCESS;}

 

this instance come from beyond the c++ sl an introduction to booooooost