alt Hacker NewsI took some shit in the comments yesterday for suggesting "you can do it with a few lines of standard C++" to another similar thread, but yet again here we are.
Defer takes 10 lines to implement in C++. [1]
You don't have to wait 50 years for a committee to introduce basic convenience features, and you don't have to use non-portable extensions until they do (and in this case the __attribute__((cleanup)) has no equivalent in MSVC), if you use a remotely extensible language.
[1] https://www.gingerbill.org/article/2015/08/19/defer-in-cpp/
Why is this a relevant comment? We're talking about C, not C++. If you wanted to suggest using an alternative language, you're probably better off recommending Zig: defer takes 0 lines to implement there, and it's closer to C than what C++ is.