C++ Lambda Idioms (2022) [video]

https://www.youtube.com/watch?v=xBAduq0RGes

by lichtenberger • 3 years ago

54 7 3 years ago

Good god kill it with fire. If lambdas have so many subtleties they're more trouble than they're worth.

You know what improves readability? Writing a function and giving it an explicit suffix like _callback or _filter_condition or _ordering.

C++ Lambdas can respectfully get flushed down the toilet with most of the C++ standard and the 10 billion cases of undefined behavior you have to keep in the back of your head at all times.

gemstones• 3 years ago

Out of curiosity, I wonder it there's a group that would be willing to sponsor a C++ standard that is just a subset of the current C++ one?

Having the standard, and the ABI, seems valuable. And it would be a lot of trouble to write one from scratch. But it would be less trouble, probably, to go through the standard and remove things that could be safely removed.

i_am_a_peasant3• 3 years ago

At this point I'm just betting that someone is going to write a TypeScript for C++. Until then, I'm sticking to Rust. I just want to get the job done and make money, and so far the ROI on Rust has been HUGE for me. I can't remember the last segfault I've seen.

tcbawo• 3 years ago

Locality also improves readability. Lambdas for std::algorithm functions are intuitive and concise. Like everything, they can be misused.

thom• 3 years ago

Not sure if you've seen std::visit or if it's covered in this talk, but it's another triumph of the possible over the sensible using C++ lambdas.

C++ Lambda Idioms (2022) [video]

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