regex_command_parser.cpp

// Example program
#include <iostream>
#include <string>
#include <map>
#include <regex>
#include <algorithm>

using std::cin;
using std::cout; 
using std::string;
using std::stod;
using std::smatch;
using std::regex_search;
using std::regex; 
  

std::regex operator "" _rx  (const char *str, std::size_t len) { return {str,len}; }

int main()
{
    string line;
    while (getline(cin,line) && line != "|") { //ok wczytalismy linie
    
        smatch match;
        if (!regex_search (line, match, "^\\s*([^:;]*[^:;\\s])?\\s*"_rx )) {
          cout << "Bad input '" << line <<"'\n";
          continue;
        }
        
        if( match[1].matched ) {
          cout << "Name: '" << match[1] <<"'\n";
        }
        
        if( match[0].second == line.end() )
        {
            continue;
        }
        
        string::const_iterator it = match[0].second;
        
        if( *(it++) == ':' ) {
            while( regex_search (it,line.cend(), match, "^\\s*([^,;]*[^,;\\s])?\\s*"_rx ) ) { 
                if( match[1].matched ) {
                  cout << "Var: '" << match[1] <<"'\n";
                }
                it = match[0].second;
                if( it == line.end() ||  *(it++) == ';' ) break;
            }
        }
        
        if(it != line.end()) {
            cout << "Comment: '" << string(it,line.cend())  <<"'\n";
        }
    }    
}