pmr/pmrsync0.cpp

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.

---

// raw code

#include <iostream>
#include <string>
#include <map>

int main()
{
  std::map<long, std::string> coll;

  for (int i=0; i<10; ++i) {
    std::string s{"Customer" + std::to_string(i)};
    coll.emplace(i, s);
  }

  // print element distances:
  for (const auto& elem : coll) {
    static long long lastVal = 0;
    long long val = reinterpret_cast<long long>(&elem);
    std::cout << "diff: " << (val-lastVal) << '\n';
    lastVal = val;
  }
}