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

module;              // start module unit with global module fragment

#include <string>

module Mod2:Order;   // internal partition declaration

struct Order {
  int count;
  std::string name;
  double price;

  Order(int c, std::string n, double p)
   : count{c}, name{n}, price{p} {