What is the best way to do compile time value replacement ? ( enum, constexpr )

[chris-nee]

Came across this - Compiler Explorer

• using const / constexpr does help us to do compile time value replacement

Notes:

• Discussion on stackoverflow: https://stackoverflow.com/questions/57079166/does-the-compiler-replace-constant-variables-with-their-value-in-c

[benedictkao]

Yup I think we can just use constexpr in cpp files, but not sure what is the best practice for header files