#include <iostream>

#include <string>

#include <regex>

using namespace std;

int main()

{

    //regex_match匹配整个字符串

    regex reg1("\\w+day");

    string s1 = "saturday";

    string s2 = "saturday and sunday";

    smatch r1;

    smatch r2;

    cout << boolalpha << regex_match(s1, r1, reg1) << endl;

    cout << boolalpha << regex_match(s2, r2, reg1) << endl;

    cout << "s1匹配结果：" << r1.str() << endl;

    cout << "s2匹配结果：" << r2.str() << endl;

    cout << endl;

    //regex_match只返回第一个匹配结果

    smatch rr1;

    smatch rr2;

    cout << boolalpha << regex_search(s1, rr1, reg1) << endl;

    cout << "s1匹配结果：" << rr1.str() << endl;

    cout << boolalpha << regex_search(s2, rr2, reg1) << endl;

    cout << "s1匹配结果：" << rr2.str() << endl;

    cout << endl;

    //使用iterator返回多个匹配结果

    //结果要用->

    cout << "iterator结果：" << endl;

    sregex_iterator it(s2.begin(), s2.end(), reg1);

    sregex_iterator end;

    for(; it != end; ++it)

    {

        cout << it->str() << endl;

        //cout << *it << endl; 错误

    }

    cout << "token_iterator结果：" << endl;

    sregex_token_iterator tit(s2.begin(), s2.end(), reg1);

    sregex_token_iterator tend;

    for(; tit != tend; ++tit)

    {

        cout << tit->str() << endl;

        cout << *tit << endl;

    }

    //子表达式匹配

    regex reg2("(\\d{1,3}):(\\d{1,3}):(\\d{1,3}):(\\d{1,3})");

    string ip = "0:11:222:333";

    smatch m;

    regex_match(ip, m, reg2);

    cout << "输出：str()" << endl;

    cout << m.str() << endl;

    cout << m.str() << endl;

    cout << m.str() << endl;

    cout << m.str() << endl;

    cout << m.str() << endl;

    cout << "输出：[i]" << endl;

    cout << m[] << endl;

    cout << m[] << endl;

    cout << m[] << endl;

    cout << m[] << endl;

    cout << m[] << endl;

    //输出结果同上

    //regex_search(ip, m, str2);

    cout << endl;

    string ip2 = "0:11:222:333 4:55:66:7";

    sregex_iterator ip_it(ip2.begin(), ip2.end(), reg2);

    sregex_iterator ip_end;

    for(; ip_it != ip_end; ++ip_it)

    {

        cout << ip_it->str() << endl;

        cout << ip_it->str() << endl;

        cout << ip_it->str() << endl;

        cout << ip_it->str() << endl;

        cout << ip_it->str() << endl;

    }

    return ;

}