C++ On and off the bandwagon

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:

/* recursive generic lambda */
auto summa = [](auto first, auto ... second) 
{
 if constexpr (sizeof ... (second) > 0) {
    return first + summa(second ...);
 }
 else {
    return first;
 }
};

/* 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.

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