The following code example is taken from the book
C++17 - The Complete Guide by Nicolai M. Josuttis, Leanpub, 2017
The code is licensed under a Creative Commons Attribution 4.0 International License. Creative Commons License

// raw code

#include <string>
#include <utility>  // for std::move()

class Customer {
  std::string first;
  std::string last;
  long val;
  Customer (std::string f, std::string l, long v)
   : first{std::move(f)}, last{std::move(l)}, val{v} {
  std::string getFirst() const {
    return first;
  std::string getLast() const {
    return last;
  long getValue() const {
    return val;