Source code for the examples in my Udemy course "Update to C++17" https://www.udemy.com/course/update-to-cpp17/?couponCode=BF4FE4A01D9249D07B43
This course is also available as an e-book: https://books2read.com/u/baoxz6
and also in hardback and paperback: https://www.amazon.com/dp/B0BW2RY4VX