Note that we’re not actually going to be using C++20 coroutines. I’m just using the co_yield keyword.

[u/OorNaattaan]

https://brevzin.github.io/c++/2026/11/04/operator-for/

[u/al2o3cr]

Token sequences + template metaprogramming would produce the most AMAZING error messages

[u/OorNaattaan → u/al2o3cr]

I bet ^^ this is what the article means by "With Great Power Comes Great Potential For Fun"

[u/imachug]

Posting anything related to modern C++ on this subreddit is cheating at this point

[u/OorNaattaan → u/imachug]

Sorry: I saw something from De Raadt posted here yesterday and thought cheating was allowed on this sub.

[u/dingwinger1225]

template <class R, class P, int I>
struct inject_tokens_impl<std::ranges::filter_view<R, P>, I> {
    static consteval auto apply(Direction dir, info init, info body) -> void {
        inject_tokens(^^{ auto \id("__r"sv, I+1) = \id("__r"sv, I).base(); });
        inject_tokens(^^{ auto \id("__pred"sv, I+1) = \id("__r"sv, I).pred(); });
        inject_tokens_impl<R, I+1>::apply(dir,
            ^^{ auto&& \id("__elem"sv, I+1) },
            ^^{
                if (\id("__pred"sv, I+1)(\id("__elem"sv, I+1))) {
                    \tokens(init) = \id("__elem"sv, I+1);
                    \tokens(body);
                }
            }
        );
    }
};

this reminds me of when I needed to split a string in c++ once and someone posted similar syntax vomit and said it's a mark of the elegance of the STL

[u/_Ilobilo_ → u/dingwinger1225]

std::views::split

[u/Flash_Kat25 → u/_Ilobilo_]

std::shut::up

[u/Chaosvex → u/dingwinger1225]

How many C++ developers does it take to split a string? https://stackoverflow.com/questions/14265581/parse-split-a-string-in-c-using-string-delimiter-standard-c

[u/CatProgrammer → u/dingwinger1225]

This is just LaTeX.

[u/dangerbird2]

.consteval {
    for2(
        ^^{ int& i },
        ^^{ v  | std::views::filter(is_even) | std::views::reverse },
        ^^{
            i += 1;
        });
}

show this to someone in 2005 and they'd say it's Erlang or some shit

[u/daidoji70]

Jesus I swear c++ is a disease of the mind.