Immediate Functions in C++

Immediate functions or the functions which have consteval keyword before their return type has been introduced with the release of C 20 , consteval functions are the functions that must be evaluated at compile time to produce a constant. It serves the same functionality as constexpr function but with little more restriction.

So , before understanding the consteval functions let's have a look at constexpr functions.

Immediate Function is a new feature introduced in C 20 in 2020.

What is conste...