this post was submitted on 16 Oct 2024
60 points (96.9% liked)
Rust
5876 readers
120 users here now
Welcome to the Rust community! This is a place to discuss about the Rust programming language.
Wormhole
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
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
What if I specify the wrong type?
let retrieved = storage.get::<SomeOtherType>();?Is it a runtime error or a compile time error?
To answer my own question: I believe it's a runtime error: https://doc.rust-lang.org/stable/std/any/trait.Any.html#method.downcast
Well, you would determine the
TypeIdofSomeOtherType, then search for that as the key in your HashMap and get back aNone, because no entry exists and then you'd hand that back to the user.I guess, my little usage example should've included handling of an
Optionvalue...So, it's only a runtime error, if you decide to
.unwrap()or similar.