//********************************************************
// The following code example is taken from the book
//  C++ Move Semantics - The Complete Guide
//  by Nicolai M. Josuttis (www.josuttis.com)
//  http://www.cppmove.com
//
// The code is licensed under a
//  Creative Commons Attribution 4.0 International License
//  http://creativecommons.org/licenses/by/4.0/
//********************************************************


#include <iostream>
#include <string>

class IntString
{
  private:
    int val;           // value
    std::string sval;  // cached string representation of the value
  public:
    IntString(int i = 0)
     : val{i}, sval{std::to_string(i)} {
    }
    void setValue(int i) {
      val = i;
      sval = std::to_string(i);
    }
    //...
    void dump() const {
      std::cout << " [" << val << "/'" << sval << "']\n";
    }
};