Rust const generics MVP hits beta

Re:Rust const generics MVP hits beta by safarimonkey on Friday February 26, 2021 @06:06PM (#26280918)

I ran into this the other day, and it took me a moment to realise that I could just use `matches!`:

    // want to do this
    if not let Some("pattern") = val {
        doSomething();
    }

    // can instead do
    if !matches!(val, Some("pattern")) {
        doSomething();
    }

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Re:Rust const generics MVP hits beta by NobodyNada on Friday February 26, 2021 @06:18PM (#26281006)

That won’t allow extracting a value from the optional though, will it? i.e. I can’t do this something along the lines of:

    if !matches!(val, Some(let x))

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Re:Rust const generics MVP hits beta by safarimonkey on Friday February 26, 2021 @07:05PM (#26281338)

Indeed not, so it's not a full replacement. I'm not entirely sure that I like the idea of an "if let" variant creating bindings that escape the visual block, but I'd probably get over it.

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