[c++] std::quoted

11 Dec 2023

When used with the input stream (std::istream), std::quoted manipulator reads a string enclosed in quotes from the input stream, allowing you to extract quoted fields from the input.

Here’s an example of how std::quoted can be used:

#include <iostream>
#include <string>
#include <sstream>

int main() {
    std::string input = "John,Doe,\"123 Main St\",New York";
    std::istringstream iss(input);
    
    std::string name, surname, address, city;
    
    std::getline(iss, name, ',');
    std::getline(iss, surname, ',');
    iss >> std::quoted(address);
    std::getline(iss >> std::ws, city); // Using std::ws to consume leading white space
    
    std::cout << "Name: " << name << ", Surname: " << surname << ", Address: " << address << ", City: " << city << std::endl;
    
    return 0;
}

In this example, std::quoted is used to extract the quoted address field from the input string, “123 Main St”.

By using std::quoted, you can gracefully handle the quoted fields in a delimited string.

For more information, you can refer to the cppreference page.