Return an slice from a previously created array

1

Hi, I have this code :
let key = match args_vec.get(0) {

        Some(&"rand") => &rand::random::<[u8; 16]>(),

        Some(k) => k.as_bytes(),

        None => {

            msg.reply(ctx, "input a key").await?;

            return Ok(())

        }

    };

The rust compiler complains because rand::random::<[u8; 16]>() does not live long enough. How can I extend his lifetime so I can successfully return a slice from it?

2

You can't return references to something that you create on the spot. You could return the array by value, but since you need the types to match with the non-random case, why don't you just turn both values (random() and k) into a Vec instead?

3

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