Regex_search special symbol

gistfile1.txt

//
//  main.cpp
//  Seiki
//
//  Created by Shichimitoucarashi on 2020/07/12.
//  Copyright © 2020 keisukeYamagishi. All rights reserved.
//

#include <iostream>
#include <regex>

using namespace::std;

int main(int argc, const char * argv[]) {
    // insert code here...
    string tokushu[31] = {"!","\"","+","-","@",">","<","~","$",
        "%","&","?","#","\'",":","*","/"," ","(",")","{","}", "|","`","=","","＋","^","[","]","_"};
    smatch match;
    int len = sizeof(tokushu) / sizeof(tokushu[0]);
    for( int i = 0; i < len; ++i ){
        if(regex_search(tokushu[i], match, regex("[!\"+-@><~$%&?#\'*/ ^(:_;){}¥|`=[\\]]"))){
            cout << "matched: " << tokushu[i] << endl;
        }else{
            cout << tokushu[i] << endl;
        }
    }
    return 0;
}