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  •  TehPers   ( @TehPers@beehaw.org ) English
    1·
    4 个月前

    That’s not an alternative, it’s removing let-else entirely. It’s equivalent to this:

    let i = if let Some(i) = opt_number {
    i
} else {
    return 0;
};

    let-else is specifically a feature that allows you to use a refutable pattern to deconstruct a value by providing a diverging else branch.

    •  soc   ( @soc@programming.dev ) English
      1·
      4 个月前

      Removing let-else is the whole point of the linked article series:

      Being able to do to everything Rust does, but without Rust’s zoo of if-then-else, match, if-let, let-else etc.