You don't at all. #[macro_use] is not required in 2018 edition. I was able to compile it fine without it using only the 2nd change I described above. To be clear, the typo I described before was of my own doing and nothing to do with your code.
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You don't at all.
#[macro_use]is not required in 2018 edition. I was able to compile it fine without it using only the 2nd change I described above. To be clear, the typo I described before was of my own doing and nothing to do with your code.