comptime/constinit.cpp

The following code example is taken from the book
C++20 - The Complete Guide by Nicolai M. Josuttis, Leanpub, 2021
The code is licensed under a Creative Commons Attribution 4.0 International License. Creative Commons License

// raw code

#include "truthc.hpp"
#include <iostream>

constinit int val = theTruth.value ;  // initialized after theTruth is initialized

int main()
{
  std::cout << val << '\n';   // guaranteed to be 42
  ++val;
  std::cout << val << '\n';   // guaranteed to be 43
}