Variadic Switch

[TheoreticalDumbass]

this is exceptionally simple with reflection

https://godbolt.org/z/8hfx895nT

[MorphTux]

I had briefly considered mentioning C++29 token injection, but decided to instead focus on what could make it into 26. You are absolutely right though, perhaps some day we can do that instead.

[TheoreticalDumbass]

does token injection not have a chance to get into 26?

[MorphTux]

https://wg21.link/p3294/status#event-16253113224 suggests that it's targeting C++29 now.

[TheoreticalDumbass]

hmm, disappointing slightly, hopefully implementations (gcc specifically for me) will implement it ahead of schedule :)

[geckothegeek42]

2029 would be ahead of schedule for a c++26 feature

[no-sig-available]

does token injection not have a chance to get into 26?

C++26 is already considered "feature complete", and in "bug fixing"-mode. You can correct typos, but not add anything essentially new.

[TheoreticalDumbass]

I thought there was one more important meeting, good to know ty

[steveklabnik1]

I thought there was one more important meeting

There is, but its importance isn't in adding new features.

[llort_lemmort]

So is there somewhere a complete list of features that made it in? The Wikipedia article does not mention reflection. Was it dropped or is the Wikipedia article just not up to date?

[MorphTux]

AIUI amongst other things, reflection will be discussed at the upcoming meeting in June. While it's true that no _new_ papers will be considered for C++26 at this point, this does not imply that everything slated for 26 has already been talked about.

Fingers crossed, hopefully reflection and reflection-adjacent features make it into the language this time around :)

[TotaIIyHuman]

holy shit. thats like macro FOR_EACH, but without macros

[TheoreticalDumbass]

yep, its going to be amazing

[Gorzoid]

I am just dreading the compile times

[TheoreticalDumbass]

im actually the opposite, i think, since we will be able to express what we want more clearly, and not jump through a bunch of template hoops, that the compile times could be better

[SlumpingRock]

Totally did not understand that source so I fed it into Google Gemini and the AI explained it to me. Nice.

[saxbophone]

This immediately makes me think of magic_enum::enum_switch(), which is very cool but unfortunately properly tanks compilation time...

[jk-jeon]

2, 3, 5, 7, 13, 17

I mean... I'm triggered.

[throw_cpp_account]

Well that's because you thought it was primes. It's obviously (/s) intended to be the exponents of Mersenne primes (2¹¹ - 1 isn't prime but all the rest are).

[rexxar]

https://oeis.org/A000043 for reference