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What are some mind blowing Rust tricks?
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this post was submitted on 16 Oct 2024
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Rust
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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.