Sometimes ago I have shown a first real life example of the reason of existence of generic lambda, I have managed to make.
Now please consider this:
1 2 3 4 5 6 7 8 9 10 | /* recursive generic lambda */ auto summa = [](auto first, auto ... second) { if constexpr (sizeof ... (second) > 0) { return first + summa(second ...); } else { return first; } }; |
This is not a toy. I also use it in my previous post. For me this is the celebration of standard C++. But.
Make no mistake. There are still numerous people who consider this kind of code the epitome of the end of C++. They are hotly against Functional Programming (FP) . And hotly against the auto keyword. And hotly against whatever they can think of on a given day in some forum.
I have really nothing against them, but I have to think these are the people who first jumped from the C++11/14/17 “lunacy” onto the D bandwagon, and then jumped of it, when it turned to be a “slow train crash“.
Now they are probably considering “Rust“. Until they make a full circle back to the jumping onto the standard C++ bandwagon.
