"C++ preg split() 구현"의 두 판 사이의 차이

2023년 9월 29일 (금) 16:49 판

1 개요

C++ 문자열 split() 구현
C++ 문자열 preg_split() 구현

2 aaa1bbb2ccc

C++

CPU

2.7s

MEM

177M

2.8s

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#include <iostream>
#include <vector>
#include <regex>
using namespace std;

int main() {
    string line("aaa1bbb2ccc");    
    regex rx("[0-9]");
    sregex_token_iterator iter(line.begin(), line.end(), rx, -1), end;
    vector<string> strs{iter, end};
    for (string s: strs) cout << s << ", "; // aaa, bbb, ccc, 
}

aaa, bbb, ccc,

3 123aaa

C++

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#include <iostream>
#include <vector>
#include <regex>
using namespace std;

int main() {
    string line("123aaa");
    regex seps("[0-9]");
    sregex_token_iterator iter(line.begin(), line.end(), seps, -1), end;
    vector<string> tokens{iter, end};
    for (string t: tokens) cout << t << ", "; // , , , aaa, 
}

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C++

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#include <iostream>
#include <vector>
#include <regex>
using namespace std;

int main() {
    string line("123aaa");
    regex seps("[0-9]");
    sregex_token_iterator iter(line.begin(), line.end(), seps, -1);
    auto tokens = vector<string>(iter, sregex_token_iterator());
    tokens.erase(remove_if(tokens.begin(), tokens.end(), [](string const& s){ return s.empty(); }), tokens.end());
    for (string t: tokens) cout << t << ", "; // aaa, 
}

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4 abc,defgh,ijk

C++

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#include <iostream>
#include <regex>
#include <vector>
using namespace std;

int main() {
    string in = "abc,defgh,ijk";
    
    regex rx(",");
    sregex_token_iterator iter(in.begin(), in.end(), rx, -1), end;
    vector<string> strs{iter, end};
    for (string s: strs) cout << s << ' '; // abc defgh ijk 
}

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C++

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#include <iostream>
#include <sstream>
#include <vector>
using namespace std;

int main() {
    string in = "abc,defgh,ijk";
    
    vector<string> strs;
    istringstream ss(in);
    for (string s; getline(ss, s, ','); ) {
        strs.push_back(s);
    }
    for (string s: strs) cout << s << ' '; // abc defgh ijk 
}

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