Match

std::regex_match determines if text matches a text pattern. You can further analyse the search result of type std::match_results.

The code snippet below shows three simple applications of std::regex_match: a C string, a C++ string and a range returning only a boolean. The three variants are available for std::match_results objects respectively.

std::match

// match.cpp 
...
#include <regex>
...

std::string numberRegEx(R"([-+]?([0-9]*\.[0-9]+|[0-9]+))");
std::regex rgx(numberRegEx);
const char* numChar{"2011"};

if (std::regex_match(numChar, rgx)){
  std::cout << numChar << " is a number." << std::endl;
}                                            // 2011 is a number.

const std::string numStr{"3.14159265359"};
if (std::regex_match(numStr, rgx)){
  std::cout << numStr << " is a number." << std::endl;
}                                           // 3.14159265359 is a number.

const...