RegTokIt, C++ (gcc)

Language: Layout:

//g++  7.4.0
//RegTokIt
//this code is created by Rezaul Hoque on March 08,2022;contact: jewelmrh@yahoo.com,Dhaka, Bangladesh
//note: codes shared by Rezaul Hoque on rextester are not for sale; they are created and shared to facilitate the algorithm learning process; many like Hoque use this platform to practice programming ;Rezaul hopes his contribution helps others to fine tune their learning;
#include <iostream>
#include <iterator>
#include <string>
#include <regex>

int main ()
{

std::cout<<" regex_token_iterator:: operator==\n";
  std::string s ("\"Holistic holographic movie Hollowman was first released on a holiday in Hollywood\n\"");
  std::regex rg ("(\\b([hH]ol)([^ ]*))");

std::regex_token_iterator<std::string::iterator> regend;

// iterate over second submatches of each match:
  std::regex_token_iterator<std::string::iterator> regit ( s.begin(), s.end(), rg, 2 );

while (!(regit==regend)) {
    std::cout << *regit << std::endl;
    ++regit;
  }

//regex_token_iterator::operator=
//Copy assignment

std::cout<<" regex_token_iterator:: operator=\n";

typedef std::regex_token_iterator<std::string::iterator> it_type;

it_type rtiStr;

std::cout << "Full match:";
  for (rtiStr = it_type (s.begin(),s.end(),rg); rtiStr!=regend; ++rtiStr)
    std::cout << " [" << *rtiStr << "]";
  std::cout << std::endl;

std::cout << " Submatch #2:";
  for (rtiStr = it_type (s.begin(),s.end(),rg,2); rtiStr!=regend; ++rtiStr)
    std::cout << " [" << *rtiStr<< "]";
  std::cout << std::endl;

std::cout << " Submatche #1 & #2:";
  int submatches[] = { 1, 2 };
  for (rtiStr= it_type (s.begin(),s.end(),rg,submatches); rtiStr!=regend; ++rtiStr)
    std::cout << " [" << *rtiStr<< "]";
  std::cout << std::endl;

std::cout << "matches as splitters:";
  for (rtiStr= it_type (s.begin(),s.end(),rg,-1); rtiStr!=regend; ++rtiStr)
    std::cout << " [" << *rtiStr<< "]";
  std::cout << std::endl;

//regex_token_iterator::operator->
//Dereference regex_token_iterator

std::cout<<" regex_token_iterator:: operator->\n";
  // iterate over second submatches of each match:
  
  // iterate over second submatches of each match:
  std::regex_token_iterator<std::string::iterator> rit ( s.begin(), s.end(),rg,2);
  while (rit!=regend) {
    std::cout << rit->str() << std::endl;
    ++rit;
  }

//regex_token_iterator:: operator*

std::cout<<" regex_token_iterator:: operator*\n";

rtiStr=it_type(s.begin(),s.end(),rg,2);

while (rtiStr!=regend) {
    std::cout << *rtiStr<< std::endl;
    ++rtiStr;
  }

return 0;
}

Show compiler warnings [ + ] Compiler args [ + ] Show input
Compilation time: 3.73 sec, absolute running time: 0.15 sec, cpu time: 0.01 sec, memory peak: 5 Mb, absolute service time: 4,05 sec