// fig08_18.cpp
// Matching patterns throughout a string.
#include <fmt/format.h> 
#include <iostream>
#include <regex>
#include <string>

int main() {
   // performing a simple match
   std::string s1{"Programming is fun"};
   std::cout << fmt::format("s1: {}\n\n", s1);
   std::cout << "Search anywhere in s1:\n"
      << fmt::format("Programming: {}; fun: {}; fn: {}\n\n",
            std::regex_search(s1, std::regex{"Programming"}),
            std::regex_search(s1, std::regex{"fun"}),
            std::regex_search(s1, std::regex{"fn"}));

   // ignoring case
   std::string s2{"SAM WHITE"};
   std::smatch match; // store the text that matches the pattern
   std::cout << fmt::format("s2: {}\n\n", s2);
   std::cout << "Case insensitive search for Sam in s2:\n"
      << fmt::format("Sam: {}\n", std::regex_search(s2, match,
            std::regex{"Sam", std::regex_constants::icase}))
      << fmt::format("Matched text: {}\n\n", match.str());

   // finding all matches
   std::string contact{
      "Wally White, Home: 555-555-1234, Work: 555-555-4321"};
   std::regex phone{R"(\d{3}-\d{3}-\d{4})"};

   std::cout << fmt::format("Finding phone numbers in:\n{}\n", contact);
   while (std::regex_search(contact, match, phone)) {
      std::cout << fmt::format("   {}\n", match.str());
      contact = match.suffix();
   }
}




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