Programming

17511 readers

172 users here now

Welcome to the main community in programming.dev! Feel free to post anything relating to programming here!

Cross posting is strongly encouraged in the instance. If you feel your post or another person's post makes sense in another community cross post into it.

Hope you enjoy the instance!

Rules

Follow the programming.dev instance rules
Keep content related to programming in some way
If you're posting long videos try to add in some form of tldr for those who don't want to watch videos

Wormhole

Follow the wormhole through a path of communities !webdev@programming.dev

founded 1 year ago

MODERATORS

snowe@programming.dev

Ategon@programming.dev

MaungaHikoi@lemmy.nz

201

The empire of C++ strikes back with Safe C++ proposal (www.theregister.com)

submitted 1 month ago by mox@lemmy.sdf.org to c/programming@programming.dev

56 comments fedilink hide all child comments

you are viewing a single comment's thread
view the rest of the comments

[–] Ephera@lemmy.ml 8 points 1 month ago (1 children)

I'm a bit surprised that it's supposed to be this bad, given that Mozilla uses it in Firefox and there's the whole CXX toolchain.

Granted, Rust was not designed from the ground up to be C++-like, but I'm really not sure that's a good idea anyways.
Wanting bug-free programs without wanting functional programming paradigms is a bit like:

Of course, if we're able to migrate a lot of old C++ codebases to a slightly better standard relatively easily, then that is still something...

[–] FizzyOrange@programming.dev 2 points 1 month ago (1 children)

The biggest issue is move constructors. Explanation here: https://cxx.rs/binding/cxxstring.html#restrictions

Probably seems like a little thing but I found it quite annoying in practice, and there are other things like not being able to combine serde-derive and cxx FFI on the same struct.

[–] Ephera@lemmy.ml 3 points 1 month ago

Sounds like you'll always have to do this little dance for any string you want to pass through, so I can definitely see how that could become quite annoying.

For not being able to combine serde-derive and cxx FFI on the same struct, there's a simple trick that can be used for many such situations:

struct CxxThingamabob { ... }

#[derive(Serialize, Deserialize)]
#[serde(transparent)]
struct SerializableCxxThingamabob(CxxThingamabob);

That just moves the Serde implementation to a different struct, so that you can choose which one you want by either wrapping or unwrapping it.