Rust const generics MVP hits beta

Re:Rust const generics MVP hits beta by NobodyNada on Friday February 26, 2021 @05:51PM (#26280804)

Swift has had ‘guard’ statements since 2015, and it’s the biggest thing I miss when programming in Rust:

    guard let x = ... else {
        // must not fall through, so a return, break, throw, non-returning function call, etc. is required
    }
    // do something with x

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Re:Rust const generics MVP hits beta by kibwen on Friday February 26, 2021 @07:05PM (#26281341)

In Rust I would just do:

    let x = match foo {
        Some(x) => ...,
        None => return // or break, etc.
    };
    // do something with x

(This is assuming that you don't want to propagate an error or panic, which could be more easily done with `foo?` or `foo.unwrap()` respectively.)

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Re:Rust const generics MVP hits beta by emptysea on Friday February 26, 2021 @07:32PM (#26281500)

A nice quality of the `guard` in swift is that you can chain multiple conditions, which is harder to do in rust (maybe with some macros a la if_chain?)

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