this post was submitted on 27 Sep 2023
182 points (97.4% liked)

Rust

5979 readers
88 users here now

Welcome to the Rust community! This is a place to discuss about the Rust programming language.

Wormhole

!performance@programming.dev

Credits

  • The icon is a modified version of the official rust logo (changing the colors to a gradient and black background)

founded 1 year ago
MODERATORS
182
The ???? operator (programming.dev)
submitted 1 year ago* (last edited 1 year ago) by snaggen@programming.dev to c/rust@programming.dev
 

I found this funny.

The context is as explained by @laund@hachyderm.io

the issue is that you can't return from inside a closure, since the closure might be called later/elsewhere

and this post was the asnwer to the question by @antonok@fosstodon.org

you got me curious what the record for the longest ? operator chain on crates.io is

Original post: https://fosstodon.org/users/antonok/statuses/111134824451525448

you are viewing a single comment's thread
view the rest of the comments
[–] sip@programming.dev 12 points 1 year ago* (last edited 1 year ago) (2 children)

there was a comment about adding an ?! operator that would resolve any number of ? operators but I can't find it.

[–] aloso@programming.dev 2 points 1 year ago

I can't remember ever needing more than two question marks (??), and even that is very rare in my experience.