C++ Weekly - Ep 448 - C++23's forward_like

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[victotronics]

I had to rewind. Yes, Jason indeed did not say "more or less equivalent": he said "morally equivalent". I think the term "C++ value system" is taking on whole new meanings.

[TsvetanDimitrov]

I love the ending. I know that's not the intended message, but I choose to interpret it that way - "get back as close as possible to C, except always use RAII objects"

[josephlagrange]

Your cartoon character on previews reminds me of charachers from "Dire Straits" musicians, "Money for Nothing" video clip.

[rezwanarefin]

Can you use deducing this to write all the begin() overloads for a container? I have tried but it seems that it'll have to be more verbose than just writing the overloads manually. Because "begin() const" is supposed to return a pointer to const, not a const pointer, so forward_like doesn't help in this.

[Raspredval]

I got the forwarding part: we receive the object reference as a forwarding reference, thus the need to 'deforward' the object ref type. But I still don't know why we needed std::forward_like, wouldn't std::forward do the same thing? 🤔

[christous]

In the case shown in the video returning would be the same as returning (with the exception of std::forward_like not handling volatile-qualified types) which doesn't make the code any better.

[AlfredoCorrea]

is this a good use of std::forward_like though? The same could have been achieved using

If value were replaced by a “legacy” member function with no rvalue version, that would have been more interesting.

[TheMrKeksLp]

C++ really blows my head sometimes... And not necessarily in a good way

[ruadeil_zabelin]

This is actually a really neat function. It reads like crap but it looks like i can remove a ton of getter overloads from my code

[pw]

PSA to never, ever use this in production code 😊

[amingholizad]

I am a bit confused why we have this mechanism if the only thing it is capable of is to replace (by complicating the code) a public value? why do we not just use a public value then?

[xybelis]

auto -> decltype(auto) what a cursed thing

[qsvui]

i still don't get what this is for

[anon_y_mousse]

If C++ ever drops the regular syntax for function signatures and forces everyone to use the arrow syntax, I'm going to stop using C++. I can't stand that ugly and unnecessary format, and anyone that tells me that it's somehow easier or in any way better is wrong. If you can't use a placeholder and go back and edit it after you've written the rest of the function, then you need to learn how to use your editor better. And yes, the placeholder should be something invalid so that it won't just compile and give you a silent error later. It should *NOT* be auto.